Diagnosis Item
24: Short to power supply or earth, open circuit or line-to-line short in the CAN-B bus lines
| caution |
When servicing a CAN bus line, earth
yourself by touching a metal object such as an unpainted water pipe. If you fail to do, a component
connected to the CAN bus line may be broken.
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FUNCTION
TROUBLE JUDGMENT CONDITIONS
TROUBLESHOOTING HINTS
- Malfunction of the connector (short to power supply or earth in connector
or improperly connected)
- Malfunction of the wiring harness (short to power supply or earth, open circuit
or line-to-line short in CAN bus lines)
- Faulty ECU(s) (internal short to power supply or earth)
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STEP 1. Checking short to earth (resistance measurement)
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| note |
This check determines whether there is a short to earth in the CAN-B bus line. If a short
to earth is present in either the CAN_H or CAN_L line, check the appropriate
line only.
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| caution |
- Disconnect the negative battery terminal. For
details refer to
 .
- A digital multimeter should be used. For details refer to .
- The test wiring harness should be used. For details refer to .
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(1)Disconnect C-301 ETACS-ECU connector, and measure at the wiring harness side.
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(2)Measure the resistance between C-301 ETACS-ECU connector terminal No.6 and body
earth. <CAN_H>
OK: 1 kΩ or more
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(3)Measure the resistance between C-301 ETACS-ECU connector terminal No.7 and body
earth. <CAN_L>
OK: 1 kΩ or more
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Q.
Is the check result normal?
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 Go to Step 11.
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 Go to Step 2.
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STEP 2. Check the wiring harness between C-32 SRS connector and C-105
joint connector (CAN1) for short to earth (resistance measurement).
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| caution |
- Disconnect the negative battery terminal. For
details refer to .
- A digital multimeter should be used. For details refer to .
- The test wiring harness should be used. For details refer to .
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(1)Disconnect joint connector (CAN1), and measure at the wiring harness side.
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(2)Measure the resistance between C-105 joint connector (CAN1) terminal No.1 <LHD>
or 7 <RHD> and body earth. <CAN_H>
OK: 1 kΩ or more
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(3)Measure the resistance between C-105 joint connector (CAN1) terminal No.12 <LHD>
or 20 <RHD> and body earth. <CAN_L>
OK: 1 kΩ or more
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Q.
Is the check result normal?
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Go to Step 3.
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Go to Step 40.
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STEP 3. Check the wiring harness between C-111 A/C-ECU connector
and C-105 joint connector (CAN1) for short to earth (resistance measurement).
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| caution |
- Disconnect the negative battery terminal. For
details refer to .
- A digital multimeter should be used. For details refer to .
- The test wiring harness should be used. For details refer to .
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(1)Disconnect joint connector (CAN1), and measure at the wiring harness side.
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(2)Measure the resistance between C-105 joint connector (CAN1) terminal No.9 and body
earth. <CAN_H>
OK: 1 kΩ or more
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(3)Measure the resistance between C-105 joint connector (CAN1) terminal No.22 and
body earth. <CAN_L>
OK: 1 kΩ or more
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Q.
Is the check result normal?
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Go to Step 4.
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Go to Step 41.
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STEP 4. Check the wiring harness between C-03 combination meter connector
and C-105 joint connector (CAN1) for short to earth (resistance measurement).
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| caution |
- Disconnect the negative battery terminal. For
details refer to .
- A digital multimeter should be used. For details refer to .
- The test wiring harness should be used. For details refer to .
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(1)Disconnect joint connector (CAN1), and measure at the wiring harness side.
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(2)Measure the resistance between C-105 joint connector (CAN1) terminal No.3 and body
earth. <CAN_H>
OK: 1 kΩ or more
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(3)Measure the resistance between C-105 joint connector (CAN1) terminal No.14 and
body earth. <CAN_L>
OK: 1 kΩ or more
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Q.
Is the check result normal?
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YES <vehicles with WCM> : Go to Step 5.
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YES <vehicles with KOS> : Go to Step 6.
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NO (the check result is not normal.) : Go to Step 42.
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STEP 5. Check the wiring harness between C-33 WCM connector and C-105
joint connector (CAN1) for short to earth (resistance measurement).
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| caution |
- Disconnect the negative battery terminal. For
details refer to .
- A digital multimeter should be used. For details refer to .
- The test wiring harness should be used. For details refer to .
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(1)Disconnect joint connector (CAN1), and measure at the wiring harness side.
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(2)Measure the resistance between C-105 joint connector (CAN1) terminal No.5 and body
earth. <CAN_H>
OK: 1 kΩ or more
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(3)Measure the resistance between C-105 joint connector (CAN1) terminal No.16 and
body earth. <CAN_L>
OK: 1 kΩ or more
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Q.
Is the check result normal?
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YES <vehicles without audio unit and MMCS> : Go to Step 10.
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YES <vehicles with audio unit> : Go to Step 7.
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YES <vehicles with MMCS> : Go to Step 8.
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NO (the check result is not normal.) : Go to Step 43.
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STEP 6. Check the wiring harness between C-104 KOS-ECU connector and
C-105 joint connector (CAN1) for short to earth (resistance measurement).
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| caution |
- Disconnect the negative battery terminal. For
details refer to .
- A digital multimeter should be used. For details refer to .
- The test wiring harness should be used. For details refer to .
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(1)Disconnect joint connector (CAN1), and measure at the wiring harness side.
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(2)Measure the resistance between C-105 joint connector (CAN1) terminal No.8 and body
earth. <CAN_H>
OK: 1 kΩ or more
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(3)Measure the resistance between C-105 joint connector (CAN1) terminal No.21 and
body earth. <CAN_L>
OK: 1 kΩ or more
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Q.
Is the check result normal?
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YES <vehicles without audio unit and MMCS> : Go to Step 10.
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YES <vehicles with audio unit> : Go to Step 7.
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YES <vehicles with MMCS> : Go to Step 8.
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NO (the check result is not normal.) : Go to Step 44.
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STEP 7. Check the wiring harness between C-18 audio unit connector
and C-105 joint connector (CAN1) for short to earth (resistance measurement).
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| caution |
- Disconnect the negative battery terminal. For
details refer to .
- A digital multimeter should be used. For details refer to .
- The test wiring harness should be used. For details refer to .
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(1)Disconnect joint connector (CAN1), and measure at the wiring harness side.
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(2)Measure the resistance between C-105 joint connector (CAN1) terminal No.10 <LHD>
or 2 <RHD> and body earth. <CAN_H>
OK: 1 kΩ or more
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(3)Measure the resistance between C-105 joint connector (CAN1) terminal No.23 <LHD>
or 13 <RHD> and body earth. <CAN_L>
OK: 1 kΩ or more
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Q.
Is the check result normal?
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YES <vehicles without hands-free system> : Go to Step 10.
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YES <vehicles with hands-free system> : Go to Step 9.
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NO (the check result is not normal.) : Go to Step 45.
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STEP 8. Check the wiring harness between C-15 CAN box unit connector
and C-105 joint connector (CAN1) for short to earth (resistance measurement).
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| caution |
- Disconnect the negative battery terminal. For
details refer to .
- A digital multimeter should be used. For details refer to .
- The test wiring harness should be used. For details refer to .
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(1)Disconnect joint connector (CAN1), and measure at the wiring harness side.
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(2)Measure the resistance between C-105 joint connector (CAN1) terminal No.10 <LHD>
or 2 <RHD> and body earth. <CAN_H>
OK: 1 kΩ or more
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(3)Measure the resistance between C-105 joint connector (CAN1) terminal No.23 <LHD>
or 33 <RHD> and body earth. <CAN_L>
OK: 1 kΩ or more
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Q.
Is the check result normal?
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YES <vehicles without hands-free system> : Go to Step 10.
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YES <vehicles with hands-free system> : Go to Step 9.
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NO (the check result is not normal.) : Go to Step 46.
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STEP 9. Check the wiring harness between C-122 hands free-ECU connector
and C-105 joint connector (CAN1) for short to earth (resistance measurement).
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| caution |
- Disconnect the negative battery terminal. For
details refer to .
- A digital multimeter should be used. For details refer to .
- The test wiring harness should be used. For details refer to .
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(1)Disconnect joint connector (CAN1), and measure at the wiring harness side.
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(2)Measure the resistance between C-105 joint connector (CAN1) terminal No.7 <LHD>
or 11 <RHD> and body earth. <CAN_H>
OK: 1 kΩ or more
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(3)Measure the resistance between C-105 joint connector (CAN1) terminal No.20 <LHD>
or 24 <RHD> and body earth. <CAN_L>
OK: 1 kΩ or more
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Q.
Is the check result normal?
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Go to Step 10.
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Go to Step 47.
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STEP 10. Check the wiring harness between C-301 ETACS-ECU connector
and C-105 joint connector (CAN1) for short to earth (resistance measurement).
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| caution |
- Disconnect the negative battery terminal. For
details refer to .
- A digital multimeter should be used. For details refer to .
- The test wiring harness should be used. For details refer to .
- Strictly observe the specified wiring harness repair procedure. For details refer
to .
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(1)Disconnect ETACS-ECU connector and joint connector (CAN1), and measure at the wiring
harness side.
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(2)Measure the resistance between C-105 joint connector (CAN1) terminal No.6 and body
earth. <CAN_H>
OK: 1 kΩ or more
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(3)Measure the resistance between C-105 joint connector (CAN1) terminal No.19 and
body earth. <CAN_L>
OK: 1 kΩ or more
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Q.
Is the check result normal?
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Go to Step 48.
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Repair the wiring harness between C-301 ETACS-ECU connector and C-105 joint connector
(CAN1).
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STEP 11. Checking short to power supply (voltage measurement)
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| note |
This check determines whether there is a short to power supply in the CAN-B bus line.
If a failure is present in either the CAN_H or CAN_L line, check the appropriate
line only.
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| caution |
- A digital multimeter should be used. For details
refer to .
- The test wiring harness should be used. For details refer to .
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(1)Disconnect C-301 ETACS-ECU connector, and measure at the wiring harness side.
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(2)Turn the ignition switch to the ON position.
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(3)Measure the voltage between C-301 ETACS-ECU connector terminal No.6 and body earth. <CAN_H>
OK: 5 V or less
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(4)Measure the voltage between C-301 ETACS-ECU connector terminal No.7 and body earth. <CAN_L>
OK: 5 V or less
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Q.
Is the check result normal?
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Go to Step 21.
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Go to Step 12.
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STEP 12. Check the wiring harness between C-32 SRS connector and C-105
joint connector (CAN1) for short to power supply (voltage measurement).
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| caution |
- A digital multimeter should be used. For details
refer to .
- The test wiring harness should be used. For details refer to .
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(1)Disconnect joint connector (CAN1), and measure at the wiring harness side.
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(2)Turn the ignition switch to the ON position.
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(3)Measure the voltage between C-105 joint connector (CAN1) terminal No.1 <LHD>
or 7 <RHD> and body earth. <CAN_H>
OK: 5 V or less
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(4)Measure the voltage between C-105 joint connector (CAN1) terminal No.12 <LHD>
or 20 <RHD> and body earth. <CAN_L>
OK: 5 V or less
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Q.
Is the check result normal?
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Go to Step 13.
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Go to Step 40.
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STEP 13. Check the wiring harness between C-111 A/C-ECU connector
and C-105 joint connector (CAN1) for short to power supply (voltage measurement).
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| caution |
- A digital multimeter should be used. For details
refer to .
- The test wiring harness should be used. For details refer to .
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(1)Disconnect joint connector (CAN1), and measure at the wiring harness side.
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(2)Turn the ignition switch to the ON position.
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(3)Measure the voltage between C-105 joint connector (CAN1) terminal No.9 and body
earth. <CAN_H>
OK: 5 V or less
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(4)Measure the voltage between C-105 joint connector (CAN1) terminal No.22 and body
earth. <CAN_L>
OK: 5 V or less
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Q.
Is the check result normal?
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Go to Step 14.
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Go to Step 41.
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STEP 14. Check the wiring harness between C-03 combination meter connector
and C-105 joint connector (CAN1) for short to power supply (voltage measurement).
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| caution |
- A digital multimeter should be used. For details
refer to .
- The test wiring harness should be used. For details refer to .
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(1)Disconnect joint connector (CAN1), and measure at the wiring harness side.
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(2)Turn the ignition switch to the ON position.
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(3)Measure the voltage between C-105 joint connector (CAN1) terminal No.3 and body
earth. <CAN_H>
OK: 5 V or less
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(4)Measure the voltage between C-105 joint connector (CAN1) terminal No.14 and body
earth. <CAN_L>
OK: 5 V or less
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Q.
Is the check result normal?
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YES <vehicles with WCM> : Go to Step 15.
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YES <vehicles with KOS> : Go to Step 16.
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NO (the check result is not normal.) : Go to Step 42.
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STEP 15. Check the wiring harness between C-33 WCM connector and C-105
joint connector (CAN1) for short to power supply (voltage measurement).
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| caution |
- A digital multimeter should be used. For details
refer to .
- The test wiring harness should be used. For details refer to .
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(1)Disconnect joint connector (CAN1), and measure at the wiring harness side.
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(2)Turn the ignition switch to the ON position.
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(3)Measure the voltage between C-105 joint connector (CAN1) terminal No.5 and body
earth. <CAN_H>
OK: 5 V or less
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(4)Measure the voltage between C-105 joint connector (CAN1) terminal No.16 and body
earth. <CAN_L>
OK: 5 V or less
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Q.
Is the check result normal?
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YES <vehicles without audio unit and MMCS> : Go to Step 20.
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YES <vehicles with audio unit> : Go to Step 17.
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YES <vehicles with MMCS> : Go to Step 18.
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NO (the check result is not normal.) : Go to Step 43.
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STEP 16. Check the wiring harness between C-104 KOS-ECU connector
and C-105 joint connector (CAN1) for short to power supply (voltage measurement).
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| caution |
- A digital multimeter should be used. For details
refer to .
- The test wiring harness should be used. For details refer to .
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(1)Disconnect joint connector (CAN1), and measure at the wiring harness side.
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(2)Turn the ignition switch to the ON position.
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(3)Measure the voltage between C-105 joint connector (CAN1) terminal No.8 and body
earth. <CAN_H>
OK: 5 V or less
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(4)Measure the voltage between C-105 joint connector (CAN1) terminal No.21 and body
earth. <CAN_L>
OK: 5 V or less
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Q.
Is the check result normal?
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YES <vehicles without audio unit and MMCS> : Go to Step 20.
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YES <vehicles with audio unit> : Go to Step 17.
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YES <vehicles with MMCS> : Go to Step 18.
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NO (the check result is not normal.) : Go to Step 44.
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STEP 17. Check the wiring harness between C-18 audio unit connector
and C-105 joint connector (CAN1) for short to power supply (voltage measurement).
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| caution |
- A digital multimeter should be used. For details
refer to .
- The test wiring harness should be used. For details refer to .
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(1)Disconnect joint connector (CAN1), and measure at the wiring harness side.
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(2)Turn the ignition switch to the ON position.
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(3)Measure the voltage between C-105 joint connector (CAN1) terminal No.10 <LHD>
or 2 <RHD> and body earth. <CAN_H>
OK: 5 V or less
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(4)Measure the voltage between C-105 joint connector (CAN1) terminal No.23 <LHD>
or 13 <RHD> and body earth. <CAN_L>
OK: 5 V or less
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Q.
Is the check result normal?
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YES <vehicles without hands-free system> : Go to Step 20.
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YES <vehicles with hands-free system> : Go to Step 19.
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NO (the check result is not normal.) : Go to Step 45.
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STEP 18. Check the wiring harness between C-15 CAN box unit connector
and C-105 joint connector (CAN1) for short to power supply (voltage measurement).
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| caution |
- A digital multimeter should be used. For details
refer to .
- The test wiring harness should be used. For details refer to .
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(1)Disconnect joint connector (CAN1), and measure at the wiring harness side.
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(2)Turn the ignition switch to the ON position.
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(3)Measure the voltage between C-105 joint connector (CAN1) terminal No.10 <LHD>
or 2 <RHD> and body earth. <CAN_H>
OK: 5 V or less
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(4)Measure the voltage between C-105 joint connector (CAN1) terminal No.23 <LHD>
or 33 <RHD> and body earth. <CAN_L>
OK: 5 V or less
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Q.
Is the check result normal?
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YES <vehicles without hands-free system> : Go to Step 20.
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YES <vehicles with hands-free system> : Go to Step 19.
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NO (the check result is not normal.) : Go to Step 46.
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STEP 19. Check the wiring harness between C-122 hands free-ECU connector
and C-105 joint connector (CAN1) for short to power supply (voltage measurement).
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| caution |
- A digital multimeter should be used. For details
refer to .
- The test wiring harness should be used. For details refer to .
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(1)Disconnect joint connector (CAN1), and measure at the wiring harness side.
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(2)Turn the ignition switch to the ON position.
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(3)Measure the voltage between C-105 joint connector (CAN1) terminal No.7 <LHD>
or 11 <RHD> and body earth. <CAN_H>
OK: 5 V or less
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(4)Measure the voltage between C-105 joint connector (CAN1) terminal No.20 <LHD>
or 24 <RHD> and body earth. <CAN_L>
OK: 5 V or less
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Q.
Is the check result normal?
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Go to Step 20.
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Go to Step 47.
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STEP 20. Check the wiring harness between C-301 ETACS-ECU connector
and C-105 joint connector (CAN1) for short to power supply (voltage measurement).
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| caution |
- A digital multimeter should be used. For details
refer to .
- The test wiring harness should be used. For details refer to .
- Strictly observe the specified wiring harness repair procedure. For details refer
to .
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(1)Disconnect the joint connector (CAN1), and measure at the wiring harness side.
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(2)Turn the ignition switch to the ON position.
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(3)Measure the voltage between C-105 joint connector (CAN1) terminal No.6 and body
earth. <CAN_H>
OK: 5 V or less
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(4)Measure the voltage between C-105 joint connector (CAN1) terminal No.19 and body
earth. <CAN_L>
OK: 5 V or less
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Q.
Is the check result normal?
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Go to Step 48.
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Repair the wiring harness between C-301 ETACS-ECU connector and C-105 joint connector
(CAN1).
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STEP 21. Checking line-to-line short
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| caution |
- Disconnect the negative battery terminal. For
details refer to .
- A digital multimeter should be used. For details refer to .
- The test wiring harness should be used. For details refer to .
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(1)Disconnect C-301 ETACS-ECU connector, and check that there is continuity at the
harness side.
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(2)Check that there is continuity between C-301 ETACS-ECU connector terminal Nos.6
and 7.
OK: No continuity
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Q.
Is the check result normal?
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Go to Step 31.
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Go to Step 22.
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STEP 22. Check the wiring harness between C-32 SRS connector and C-105
joint connector (CAN1) for line-to-line short.
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| caution |
- Disconnect the negative battery terminal. For
details refer to .
- A digital multimeter should be used. For details refer to .
- The test wiring harness should be used. For details refer to .
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(1)Disconnect joint connector (CAN1), and check that there is continuity at the harness
side.
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(2)Check that there is continuity between C-105 joint connector terminal Nos.1 and
12 <LHD> or 7 and 20 <RHD>.
OK: No continuity
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Q.
Is the check result normal?
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Go to Step 23.
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Go to Step 40.
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STEP 23. Check the wiring harness between C-111 A/C-ECU connector
and C-105 joint connector (CAN1) for line-to-line short.
|
|
|
| caution |
- Disconnect the negative battery terminal. For
details refer to .
- A digital multimeter should be used. For details refer to .
- The test wiring harness should be used. For details refer to .
|
|
|
|
(1)Disconnect joint connector (CAN1), and check that there is continuity at the harness
side.
|
|
|
(2)Check that there is continuity between C-105 joint connector terminal Nos.9 and
22.
OK: No continuity
|
|
|
Q.
Is the check result normal?
|
|
|
Go to Step 24.
|
|
|
|
|
|
Go to Step 41.
|
|
|
|
|
|
STEP 24. Check the wiring harness between C-03 combination meter connector
and C-105 joint connector (CAN1) for line-to-line short.
|
|
|
| caution |
- Disconnect the negative battery terminal. For
details refer to .
- A digital multimeter should be used. For details refer to .
- The test wiring harness should be used. For details refer to .
|
|
|
|
(1)Disconnect joint connector (CAN1), and check that there is continuity at the harness
side.
|
|
|
(2)Check that there is continuity between C-105 joint connector terminal Nos.3 and
14.
OK: No continuity
|
|
|
Q.
Is the check result normal?
|
|
|
YES <vehicles with WCM> : Go to Step 25.
|
|
|
|
|
|
YES <vehicles with KOS> : Go to Step 26.
|
|
|
|
|
|
NO (the check result is not normal.) : Go to Step 42.
|
|
|
|
|
|
STEP 25. Check the wiring harness between C-33 WCM connector and C-105
joint connector (CAN1) for line-to-line short.
|
|
|
| caution |
- Disconnect the negative battery terminal. For
details refer to .
- A digital multimeter should be used. For details refer to .
- The test wiring harness should be used. For details refer to .
|
|
|
|
(1)Disconnect joint connector (CAN1), and check that there is continuity at the harness
side.
|
|
|
(2)Check that there is continuity between C-105 joint connector terminal Nos.5 and
16.
OK: No continuity
|
|
|
Q.
Is the check result normal?
|
|
|
YES <vehicles without audio unit or MMCS> : Go to Step 30.
|
|
|
|
|
|
YES <vehicles with audio unit> : Go to Step 27.
|
|
|
|
|
|
YES <vehicles with MMCS> : Go to Step 28.
|
|
|
|
|
|
NO (the check result is not normal.) : Go to Step 43.
|
|
|
|
|
|
STEP 26. Check the wiring harness between C-104 KOS-ECU connector
and C-105 joint connector (CAN1) for line-to-line short.
|
|
|
| caution |
- Disconnect the negative battery terminal. For
details refer to .
- A digital multimeter should be used. For details refer to .
- The test wiring harness should be used. For details refer to .
|
|
|
|
(1)Disconnect joint connector (CAN1), and check that there is continuity at the harness
side.
|
|
|
(2)Check that there is continuity between C-105 joint connector terminal Nos.8 and
21.
OK: No continuity
|
|
|
Q.
Is the check result normal?
|
|
|
YES <vehicles without audio unit or MMCS> : Go to Step 30.
|
|
|
|
|
|
YES <vehicles with audio unit> : Go to Step 27.
|
|
|
|
|
|
YES <vehicles with MMCS> : Go to Step 28.
|
|
|
|
|
|
NO (the check result is not normal.) : Go to Step 44.
|
|
|
|
|
|
STEP 27. Check the wiring harness between C-18 audio unit connector
and C-105 joint connector (CAN1) for line-to-line short.
|
|
|
| caution |
- Disconnect the negative battery terminal. For
details refer to .
- A digital multimeter should be used. For details refer to .
- The test wiring harness should be used. For details refer to .
|
|
|
|
(1)Disconnect joint connector (CAN1), and check that there is continuity at the harness
side.
|
|
|
(2)Check that there is continuity between C-105 joint connector terminal Nos.10 and
23 <LHD> or 2 and 13 <RHD>.
OK: No continuity
|
|
|
Q.
Is the check result normal?
|
|
|
YES <vehicles without hands-free system> : Go to Step 29.
|
|
|
|
|
|
YES <vehicles without hands-free system> : Go to Step 30.
|
|
|
|
|
|
NO (the check result is not normal.) : Go to Step 45.
|
|
|
|
|
|
STEP 28. Check the wiring harness between C-15 CAN box unit connector
and C-105 joint connector (CAN1) for line-to-line short.
|
|
|
| caution |
- Disconnect the negative battery terminal. For
details refer to .
- A digital multimeter should be used. For details refer to .
- The test wiring harness should be used. For details refer to .
|
|
|
|
(1)Disconnect joint connector (CAN1), and check that there is continuity at the harness
side.
|
|
|
(2)Check that there is continuity between C-105 joint connector terminal Nos.10 and
23 <LHD> or 2 and 33 <RHD>.
OK: No continuity
|
|
|
Q.
Is the check result normal?
|
|
|
YES <vehicles without hands-free system> : Go to Step 29.
|
|
|
|
|
|
YES <vehicles without hands-free system> : Go to Step 30.
|
|
|
|
|
|
NO (the check result is not normal.) : Go to Step 46.
|
|
|
|
|
|
STEP 29. Check the wiring harness between C-122 hands free-ECU connector
and C-105 joint connector (CAN1) for line-to-line short.
|
|
|
| caution |
- Disconnect the negative battery terminal. For
details refer to .
- A digital multimeter should be used. For details refer to .
- The test wiring harness should be used. For details refer to .
|
|
|
|
(1)Disconnect joint connector (CAN1), and check that there is continuity at the harness
side.
|
|
|
(2)Check that there is continuity between C-105 joint connector terminal Nos.7 and
20 <LHD> or 11 and 24 <RHD>.
OK: No continuity
|
|
|
Q.
Is the check result normal?
|
|
|
Go to Step 30.
|
|
|
|
|
|
Go to Step 47.
|
|
|
|
|
|
STEP 30. Check the wiring harness between C-301 ETACS-ECU connector
and C-105 joint connector (CAN1) for line-to-line short.
|
|
|
| caution |
- Disconnect the negative battery terminal. For
details refer to .
- A digital multimeter should be used. For details refer to .
- The test wiring harness should be used. For details refer to .
- Strictly observe the specified wiring harness repair procedure. For details refer
to .
|
|
|
|
(1)Disconnect joint connector (CAN1), and check that there is continuity at the harness
side.
|
|
|
(2)Check that there is continuity between C-105 joint connector terminal Nos.6 and
19.
OK: No continuity
|
|
|
Q.
Is the check result normal?
|
|
|
Go to Step 48.
|
|
|
|
|
|
Repair the wiring harness between C-301 ETACS-ECU connector and C-105 joint connector
(CAN1).
|
|
|
|
|
|
STEP 31. Check the wiring harness between C-32 SRS-ECU connector and
C-105 joint connector (CAN1)
|
|
|
(1)Disconnect SRS-ECU connector and joint connector (CAN1), and check the following
wiring harness.
|
|
|
(2)Check that there is continuity between C-32 SRS-ECU connector terminal No.15 and
C-105 joint connector (CAN1) terminal No.1 <LHD> or 7 <RHD>
OK: Continuity exists (2 Ω or less)
|
|
|
(3)Check that there is continuity between C-32 SRS-ECU connector terminal No.16 and
C-105 joint connector (CAN1) terminal No.12 <LHD> or 20 <RHD>
OK: Continuity exists (2 Ω or less)
|
|
|
Q.
Is the check result normal?
|
|
|
Go to Step 32.
|
|
|
|
|
|
Go to Step 40.
|
|
|
|
|
|
STEP 32. Check the wiring harness between C-111 A/C-ECU connector
and C-105 joint connector (CAN1)
|
|
|
(1)Disconnect A/C-ECU connector and joint connector (CAN1), and check the
following wiring harness.
|
|
|
(2)Check that there is continuity between C-111 A/C-ECU connector terminal
No.11 and C-105 joint connector (CAN1) terminal No.9
OK: Continuity exists (2 Ω or less)
|
|
|
(3)Check that there is continuity between C-111 A/C-ECU connector terminal
No.12 and C-105 joint connector (CAN1) terminal No.22
OK: Continuity exists (2 Ω or less)
|
|
|
Q.
Is the check result normal?
|
|
|
Go to Step 33.
|
|
|
|
|
|
Go to Step 41.
|
|
|
|
|
|
STEP 33. Check the wiring harness between C-03 combination meter connector
and C-105 joint connector (CAN1)
|
|
|
(1)Disconnect combination meter connector and joint connector (CAN1), and check the
wiring harness.
|
|
|
(2)Check that there is continuity between C-03 combination meter connector terminal
No.14 and C-105 joint connector (CAN1) terminal No.3
OK: Continuity exists (2 Ω or less)
|
|
|
(3)Check that there is continuity between C-03 combination meter connector terminal
No.15 and C-105 joint connector (CAN1) terminal No.14
OK: Continuity exists (2 Ω or less)
|
|
|
Q.
Is the check result normal?
|
|
|
YES <vehicles with WCM> : Go to Step 34.
|
|
|
|
|
|
YES <vehicles with KOS> : Go to Step 35.
|
|
|
|
|
|
NO (the check result is not normal.) : Go to Step 42.
|
|
|
|
|
|
STEP 34. Check the wiring harness between C-33 WCM connector and C-105
joint connector (CAN1)
|
|
|
(1)Disconnect WCM connector and joint connector (CAN1), and check the following wiring
harness.
|
|
|
(2)Check that there is continuity between C-33 WCM connector terminal No.11 and C-105
joint connector (CAN1) terminal No.5
OK: Continuity exists (2 Ω or less)
|
|
|
(3)Check that there is continuity between C-33 WCM connector terminal No.10 and C-105
joint connector (CAN1) terminal No.16
OK: Continuity exists (2 Ω or less)
|
|
|
Q.
Is the check result normal?
|
|
|
YES <vehicles without audio unit and MMCS> : Go to Step 39.
|
|
|
|
|
|
YES <vehicles with audio unit> : Go to Step 36.
|
|
|
|
|
|
YES <vehicles with MMCS> : Go to Step 37.
|
|
|
|
|
|
NO (the check result is not normal.) : Go to Step 43.
|
|
|
|
|
|
STEP 35. Check the wiring harness between C-104 KOS-ECU connector
and C-105 joint connector (CAN1)
|
|
|
(1)Disconnect KOS-ECU connector and joint connector (CAN1), and check the following
wiring harness.
|
|
|
(2)Check that there is continuity between C-104 KOS-ECU connector terminal No.1 and
C-105 joint connector (CAN1) terminal No.8
OK: Continuity exists (2 Ω or less)
|
|
|
(3)Check that there is continuity between C-104 KOS-ECU connector terminal No.2 and
C-105 joint connector (CAN1) terminal No.21
OK: Continuity exists (2 Ω or less)
|
|
|
Q.
Is the check result normal?
|
|
|
YES <vehicles without audio unit and MMCS> : Go to Step 39.
|
|
|
|
|
|
YES <vehicles with audio unit> : Go to Step 36.
|
|
|
|
|
|
YES <vehicles with MMCS> : Go to Step 37.
|
|
|
|
|
|
NO (the check result is not normal.) : Go to Step 44.
|
|
|
|
|
|
STEP 36. Check the wiring harness between C-18 audio unit connector
and C-105 joint connector (CAN1)
|
|
|
(1)Disconnect audio unit connector and joint connector (CAN1), and check the following
wiring harness.
|
|
|
(2)Check that there is continuity between C-18 audio unit connector terminal No.23
and C-105 joint connector (CAN1) terminal No.10 <LHD> or 2 <RHD>
OK: Continuity exists (2 Ω or less)
|
|
|
(3)Check that there is continuity between C-18 audio unit connector terminal No.33
and C-105 joint connector (CAN1) terminal No.23 <LHD> or 13 <RHD>
OK: Continuity exists (2 Ω or less)
|
|
|
Q.
Is the check result normal?
|
|
|
YES <vehicles without hands-free system> : Go to Step 39.
|
|
|
|
|
|
YES <vehicles with hands-free system> : Go to Step 38.
|
|
|
|
|
|
NO (the check result is not normal.) : Go to Step 45.
|
|
|
|
|
|
STEP 37. Check the wiring harness between C-15 CAN box unit connector
and C-105 joint connector (CAN1)
|
|
|
(1)Disconnect CAN box unit connector and joint connector (CAN1), and check the following
wiring harness.
|
|
|
(2)Check that there is continuity between C-15 CAN box unit connector terminal No.8
and C-105 joint connector (CAN1) terminal No.10 <LHD> or 2 <RHD>
OK: Continuity exists (2 Ω or less)
|
|
|
(3)Check that there is continuity between C-15 CAN box unit connector terminal No.9
and C-105 joint connector (CAN1) terminal No.23 <LHD> or 33 <RHD>
OK: Continuity exists (2 Ω or less)
| note |
Check C-19 intermediate connector, and repair if necessary.
|
|
|
|
Q.
Is the check result normal?
|
|
|
YES <vehicles without hands-free system> : Go to Step 39.
|
|
|
|
|
|
YES <vehicles with hands-free system> : Go to Step 38.
|
|
|
|
|
|
NO (the check result is not normal.) : Go to Step 46.
|
|
|
|
|
|
STEP 38. Check the wiring harness between C-122 hands free-ECU connector
and C-105 joint connector (CAN1)
|
|
|
(1)Disconnect hands free-ECU connector and joint connector (CAN1), and check the following
wiring harness.
|
|
|
(2)Check that there is continuity between C-122 hands free-ECU connector terminal
No.4 and C-105 joint connector (CAN1) terminal No.7 <LHD> or 11 <RHD>
OK: Continuity exists (2 Ω or less)
|
|
|
(3)Check that there is continuity between C-122 hands free-ECU connector terminal
No.16 and C-105 joint connector (CAN1) terminal No.20 <LHD> or 24 <RHD>
OK: Continuity exists (2 Ω or less)
|
|
|
Q.
Is the check result normal?
|
|
|
Go to Step 39.
|
|
|
|
|
|
Go to Step 47.
|
|
|
|
|
|
STEP 39 Check the wiring harness between C-301 ETACS-ECU connector
and C-105 joint connector (CAN1)
|
|
|
| caution |
Strictly observe the specified wiring harness repair procedure.
For details refer to .
|
|
|
|
(1)Disconnect ETACS-ECU connector and joint connector (CAN1), and check the following
wiring harness.
|
|
|
(2)Check that there is continuity between C-301 ETACS-ECU connector terminal No.6
and C-105 joint connector (CAN1) terminal No.6
OK: Continuity exists (2 Ω or less)
|
|
|
(3)Check that there is continuity between C-301 ETACS-ECU connector terminal No.7
and C-105 joint connector (CAN1) terminal No.19
OK: Continuity exists (2 Ω or less)
|
|
|
Q.
Is the check result normal?
|
|
|
Go to Step 48.
|
|
|
|
|
|
Repair the wiring harness between C-301 ETACS-ECU connector and C-105 joint connector
(CAN1).
|
|
|
|
|
|
STEP 40. M.U.T.-III CAN bus diagnostics (checking the SRS-ECU for
internal short)
|
|
|
| caution |
Strictly observe the specified wiring harness repair procedure.
For details refer to .
|
|
|
|
Disconnect C-32 SRS-ECU connector, and diagnose the CAN bus line.
|
|
OK: The display of the M.U.T.-III is as shown in the figure.
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between C-32 SRS-ECU connector and C-105 joint connector
(CAN1).
Check the SRS-ECU connector, and repair if necessary. If the SRS-ECU connector
is in good condition, replace the SRS-ECU.
|
|
|
STEP 41. M.U.T.-III CAN bus diagnostics (checking the A/C-ECU
for internal short)
|
|
|
| caution |
Strictly observe the specified wiring harness repair procedure.
For details refer to .
|
|
|
|
Disconnect C-111 A/C-ECU connector, and diagnose the CAN bus line.
|
|
OK: The display of the M.U.T.-III is as shown in the figure.
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between C-111 A/C-ECU connector and C-105 joint
connector (CAN1).
Check the A/C-ECU connector, and repair if necessary. If the A/C-ECU
connector is in good condition, replace the A/C-ECU.
|
|
|
STEP 42. M.U.T.-III CAN bus diagnostics (checking the combination
meter for internal short)
|
|
|
| caution |
Strictly observe the specified wiring harness repair procedure.
For details refer to .
|
|
|
|
Disconnect C-03 combination meter connector, and diagnose the CAN bus line.
|
|
OK: The display of the M.U.T.-III is as shown in the figure.
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between C-03 combination meter connector and C-105 joint
connector (CAN1).
Check the combination meter connector, and repair if necessary. If the combination
meter connector is in good condition, replace the combination meter.
|
|
|
STEP 43. M.U.T.-III CAN bus diagnostics (checking the WCM for internal
short)
|
|
|
| caution |
Strictly observe the specified wiring harness repair procedure.
For details refer to .
|
|
|
|
Disconnect C-33 WCM connector, and diagnose the CAN bus line.
|
|
OK: The display of the M.U.T.-III is as shown in the figure.
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between C-33 WCM connector and C-105 joint connector
(CAN1).
Check the WCM connector, and repair if necessary. If the WCM connector is in good
condition, replace the WCM.
|
|
|
STEP 44. M.U.T.-III CAN bus diagnostics (checking the KOS-ECU for
internal short)
|
|
|
| caution |
Strictly observe the specified wiring harness repair procedure.
For details refer to .
|
|
|
|
Disconnect C-104 KOS-ECU connector, and diagnose the CAN bus line.
|
|
OK: The display of the M.U.T.-III is as shown in the figure.
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between C-104 KOS-ECU connector and C-105 joint connector
(CAN1).
Check the KOS-ECU connector, and repair if necessary. If the KOS-ECU connector
is in good condition, replace the KOS-ECU.
|
|
|
STEP 45. M.U.T.-III CAN bus diagnostics (checking the audio unit for
internal short)
|
|
|
| caution |
Strictly observe the specified wiring harness repair procedure.
For details refer to .
|
|
|
|
Disconnect C-18 audio unit connector, and diagnose the CAN bus line.
|
|
OK: The display of the M.U.T.-III is as shown in the figure.
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between C-18 audio unit connector and C-105 joint connector
(CAN1).
Check the audio unit connector, and repair if necessary. If the audio unit connector
is in good condition, replace the audio unit.
|
|
|
STEP 46. M.U.T.-III CAN bus diagnostics (checking the CAN box unit
for internal short)
|
|
|
| caution |
Strictly observe the specified wiring harness repair procedure.
For details refer to .
|
|
|
|
Disconnect C-15 CAN box unit connector, and diagnose the CAN bus line.
|
|
OK: The display of the M.U.T.-III is as shown in the figure.
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between C-15 CAN box unit connector and C-105 joint
connector (CAN1).
Check the CAN box unit connector, and repair if necessary. If the CAN box unit
connector is in good condition, replace the CAN box unit.
|
|
|
STEP 47. M.U.T.-III CAN bus diagnostics (checking the hands free-ECU
for internal short)
|
|
|
| caution |
Strictly observe the specified wiring harness repair procedure.
For details refer to .
|
|
|
|
Disconnect C-122 hands free-ECU connector, and diagnose the CAN bus line.
|
|
OK: The display of the M.U.T.-III is as shown in the figure.
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between C-122 hands free-ECU connector and C-105 joint
connector (CAN1).
Check the hands free-ECU connector, and repair if necessary. If the hands free-ECU
connector is in good condition, replace the hands free-ECU.
|
|
|
STEP 48. Trouble symptom check
|
|
|
Diagnose the CAN bus line, and check that normal condition is displayed.
|
|
|
Q.
Is the check result normal?
|
|
|
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to use Troubleshooting/inspection Service Points - How to Cope with Intermittent
Malfunction ).
|
|
|
|
|
|
Check the ETACS-ECU connector, and repair if necessary. If the ETACS-ECU connector
is in good condition, replace the ETACS-ECU.
|
|
|
|