Diagnosis Item
2: Diagnose shorts in the earth to CAN bus line.
| 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.
|
FUNCTION
TROUBLE JUDGEMENT CONDITIONS
TROUBLESHOOTING HINTS
- Malfunction of the wiring harness
- Malfunction of the connector
- Malfunction of each ECU
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STEP 1. Check the CAN bus lines. Resistance measurement
at D-127 diagnosis connector.
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|
| caution |
A digital multimeter should be used. For details refer to  .
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|
| caution |
The test wiring harness should be used. For details refer
to .
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| note |
This inspection allows you to check that there is a short to earth in either CAN_H
line or CAN_L line. Thus, in the following steps, check the CAN bus line that is defective.
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(1)Disconnect resistor connector D-42 <vehicles without ASTC>
or
ASTC-ECU connector D-223 <vehicles with ASTC>
and combination meter connector
D-04, and measure the resistance at harness side of diagnosis connector D-127.
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(2)
| caution |
When measuring the resistance, disconnect the negative battery
terminal. For details refer to .
|
Ensure that the negative battery terminal is disconnected.
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|
(3)Resistance between D-127 diagnosis connector terminal No.6 (CAN_H) and
body earth
OK: 1 kΩ
or more
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(4)Resistance between D-127 diagnosis connector terminal No.14 (CAN_L) and
body earth
OK: 1 kΩ
or more
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|
Q.
Is the check result normal?
|
|
|
 <Both of the measurement results show 1 kΩ
or more>
Go
to Step 28 .
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 <Either of CAN_H line or CAN_L line the measurement
results shows 1 kΩ
or less>
Go to Step 2.
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STEP 2. Check the CAN line. Resistance measurement at D-230 intermediate
connector.
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|
| caution |
A digital multimeter should be used. For details refer to .
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|
| caution |
The test wiring harness should be used. For details refer
to .
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|
(1)Disconnect the intermediate connector (D-230), and measure at its female-side intermediate
connector (at the control wiring harness side).
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(2)
| caution |
When measuring the resistance, disconnect the negative battery
terminal. For details refer to .
|
Ensure that the negative battery terminal is disconnected.
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(3)Resistance between D-230 intermediate connector terminal No.13 (CAN_H)
and body earth
OK: 1 kΩ
or more
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(4)Resistance between D-230 intermediate connector terminal No.12 (CAN_L)
and body earth
OK: 1 kΩ
or more
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|
Q.
Is the check result normal?
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|
<1 kΩ
or more> Go to Step 15.
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<Less than 1 kΩ> Go to Step 3.
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STEP 3. Check the CAN line between joint connector (CAN2) and the
resistor <vehicles without ASTC>
or ASTC-ECU <vehicles with ASTC>.
Resistance measurement at D-22 joint connector (CAN2).
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|
| caution |
A digital multimeter should be used. For details refer to .
|
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|
| caution |
The test wiring harness should be used. For details refer
to .
|
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|
(1)Disconnect joint connector (CAN2), and measure at the wiring harness side.
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(2)
| caution |
When measuring the resistance, disconnect the negative battery
terminal. For details refer to .
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between D-22 joint connector (CAN2) terminal No.6 (CAN_H) and
body earth <3000, 3800>
OK: 1 kΩ
or more
|
|
|
(4)Resistance between D-22 joint connector (CAN2) terminal No.11 (CAN_L)
and body earth <3000, 3800>
OK: 1 kΩ
or more
|
|
|
(5)Resistance between D-22 joint connector (CAN2) terminal No.1 (CAN_H) and
body earth <3200>
OK: 1 kΩ
or more
|
|
|
(6)Resistance between D-22 joint connector (CAN2) terminal No.12 (CAN_L)
and body earth <3200>
OK: 1 kΩ
or more
|
|
|
(7)
| caution |
Strictly observe the specified wiring harness repair procedure.
For details refer to .
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|
Q.
Is the check result normal?
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|
|
YES <Vehicles with ASTC> : <1 kΩ
or more>
Go to Step 4.
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YES <Vehicles without ASTC> : <1 kΩ
or more>
Go to Step 6.
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NO (the check result is not normal.) : <Less than 1 kΩ>
Repair the wiring harness between
joint connector (CAN2) and the resistor connector <vehicle without ASTC>
or
ASTC-ECU connector <vehicles with ASTC>.
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STEP 4. Check the CAN line between joint connector (CAN2) and the
G and yaw rate sensor. Resistance measurement at D-22 joint connector (CAN2).
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|
|
| caution |
A digital multimeter should be used. For details refer to .
|
|
|
|
| caution |
The test wiring harness should be used. For details refer
to .
|
|
|
|
(1)Disconnect joint connector (CAN2), and measure at the wiring harness side.
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|
|
(2)
| caution |
When measuring the resistance, disconnect the negative battery
terminal. For details refer to .
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between D-22 joint connector (CAN2) terminal No.1 (CAN_H) and
body earth <3000, 3800>
OK: 1 kΩ
or more
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|
(4)Resistance between D-22 joint connector (CAN2) terminal No.4 (CAN_L) and
body earth <3000, 3800>
OK: 1 kΩ
or more
|
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(5)Resistance between D-22 joint connector (CAN2) terminal No.2 (CAN_H) and
body earth <3200>
OK: 1 kΩ
or more
|
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|
(6)Resistance between D-22 joint connector (CAN2) terminal No.13 (CAN_L)
and body earth <3200>
OK: 1 kΩ
or more
|
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|
(7)
| caution |
Strictly observe the specified wiring harness repair procedure.
For details refer to .
|
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|
Q.
Is the check result normal?
|
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<1 kΩ
or more> Go to Step 6.
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<Less than 1 kΩ> Go to Step 5.
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STEP 5. M.U.T.-III CAN bus diagnostics [G and yaw rate sensor
connector disconnected]
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|
(1)Disconnect G and yaw rate sensor connector D-18, and diagnose by using the M.U.T.-III.
|
|
(2)Diagnose CAN bus lines, and check if M.U.T.-III screen is as shown in the illustration.
Q.
Does M.U.T.-III screen correspond to the illustration?
Check the intermediate connector (D-225), and repair if necessary. If the intermediate
connector is in good condition, repair the wiring harness between joint connector (CAN2) and
the G and yaw rate sensor connector.
Check the G and yaw rate sensor connector, and repair if necessary. If the G and
yaw rate sensor connector is in good condition, replace the G and yaw rate sensor.
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STEP 6. Check the CAN line between joint connector (CAN2) and the
engine-A/T-ECU <3000-A/T, 3800>
or engine-ECU <3000-M/T, 3200>.
Resistance measurement at D-22 joint connector (CAN2).
|
|
|
| caution |
A digital multimeter should be used. For details refer to .
|
|
|
|
| caution |
The test wiring harness should be used. For details refer
to .
|
|
|
|
(1)Disconnect joint connector (CAN2), and measure at the wiring harness side.
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the negative battery
terminal. For details refer to .
|
Ensure that the negative battery terminal is disconnected.
|
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|
(3)Resistance between D-22 joint connector (CAN2) terminal No.7 (CAN_H) and
body earth <3000, 3800>
OK: 1 kΩ
or more
|
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|
(4)Resistance between D-22 joint connector (CAN2) terminal No.12 (CAN_L)
and body earth <3000, 3800>
OK: 1 kΩ
or more
|
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|
(5)Resistance between D-22 joint connector (CAN2) terminal No.5 (CAN_H) and
body earth <3200>
OK: 1 kΩ
or more
|
|
|
(6)Resistance between D-22 joint connector (CAN2) terminal No.16 (CAN_L)
and body earth <3200>
OK: 1 kΩ
or more
|
|
|
Q.
Is the check result normal?
|
|
|
YES <3200-A/T> : <1 kΩ
or more> Go to Step 9.
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YES <except 3200-A/T> : <1 kΩ
or more> Go to Step 11.
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NO : <Less than 1 kΩ> Go to Step 7.
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STEP 7. M.U.T.-III CAN bus diagnostics [engine-A/T-ECU connector <3000-A/T,
3800>
or engine-ECU connector <3000-M/T, 3200>
disconnected]
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|
|
(1)Disconnect engine-A/T-ECU connector D-216 <3000-A/T, 3800>
or
engine-ECU connector D-245 <3000-M/T>
or D-215 <3200>, and
diagnose by using the M.U.T.-III.
|
|
(2)Diagnose CAN bus lines, and check if M.U.T.-III screen is as shown in the illustration.
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between joint connector (CAN2) and engine-A/T-ECU connector <3000-A/T, 3800>
or
engine-ECU connector <3000-M/T, 3200>.
Go to Step 8.
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|
STEP 8. M.U.T.-III CAN bus diagnostics (retest the system)
|
|
|
Diagnose CAN bus lines, and check if M.U.T.-III screen shows normal state.
|
|
|
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 engine-A/T-ECU connector <3000-A/T, 3800>
or engine-ECU
connector <3000-M/T, 3200>, and repair if necessary. If engine-A/T-ECU connector <3000-A/T,
3800>
or engine-ECU connector <3000-M/T, 3200>
is in good condition,
replace the engine-A/T-ECU <3000-A/T, 3800>
or engine-ECU <3000-M/T, 3200>.
|
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|
STEP 9. Check the CAN line between joint connector (CAN2) and the
A/T-ECU. Resistance measurement at D-22 joint connector (CAN2).
|
|
|
| caution |
A digital multimeter should be used. For details refer to .
|
|
|
|
| caution |
The test wiring harness should be used. For details refer
to .
|
|
|
|
(1)Disconnect joint connector (CAN2), and measure at the wiring harness side.
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the negative battery
terminal. For details refer to .
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between D-22 joint connector (CAN2) terminal No.4 (CAN_H) and
body earth
OK: 1 kΩ
or more
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|
(4)Resistance between D-22 joint connector (CAN2) terminal No.15 (CAN_L)
and body earth
OK: 1 kΩ
or more
|
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|
(5)
| caution |
Strictly observe the specified wiring harness repair procedure.
For details refer to .
|
|
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|
Q.
Is the check result normal?
|
|
|
<1 kΩ
or more> Go to Step 11.
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<Less than 1 kΩ> Go to Step 10.
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|
STEP 10. M.U.T.-III CAN bus diagnostics [A/T-ECU connector
disconnected]
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|
(1)Disconnect A/T-ECU connector D-140, and diagnose by using the M.U.T.-III.
|
|
(2)Diagnose CAN bus lines, and check if M.U.T.-III screen is as shown in the illustration.
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between joint connector (CAN2) and the A/T-ECU connector.
Check the A/T-ECU connector, and repair if necessary. If the A/T-ECU connector
is in good condition, replace the A/T-ECU.
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|
STEP 11. Check the CAN line between joint connector (CAN2) and the
SRS-ECU. Resistance measurement at D-22 joint connector (CAN2).
|
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|
| caution |
A digital multimeter should be used. For details refer to .
|
|
|
|
| caution |
The test wiring harness should be used. For details refer
to .
|
|
|
|
(1)Disconnect joint connector (CAN2), and measure at the wiring harness side.
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the negative battery
terminal. For details refer to .
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between D-22 joint connector (CAN2) terminal No.3 (CAN_H) and
body earth
OK: 1 kΩ
or more
|
|
|
(4)Resistance between D-22 joint connector (CAN2) terminal No.9 (CAN_L) and
body earth <3000, 3800>
OK: 1 kΩ
or more
|
|
|
(5)Resistance between D-22 joint connector (CAN2) terminal No.14 (CAN_L)
and body earth <3200>
OK: 1 kΩ
or more
|
|
|
(6)
| caution |
Strictly observe the specified wiring harness repair procedure.
For details refer to .
|
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ
or more> Go to Step 13.
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|
|
NO : <Less than 1 kΩ> Go to Step 12.
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|
STEP 12. M.U.T.-III CAN bus diagnostics [SRS-ECU connector
disconnected]
|
|
|
(1)Disconnect SRS-ECU connector D-24, and diagnose by using the M.U.T.-III.
|
|
(2)Diagnose CAN bus lines, and check if M.U.T.-III screen is as shown in the illustration.
Q.
Does M.U.T.-III screen correspond to the illustration?
Check the intermediate connector (D-231), and repair if necessary. If the intermediate
connector is in good condition, repair the wiring harness between joint connector (CAN2) and
the SRS-ECU connector.
Check the SRS-ECU connector, and repair if necessary. If the SRS-ECU connector
is in good condition, replace the SRS-ECU.
|
|
|
STEP 13. Check the CAN line between joint connector (CAN2) and the
transfer-ECU. Resistance measurement at D-22 joint connector (CAN2).
|
|
|
| caution |
A digital multimeter should be used. For details refer to .
|
|
|
|
| caution |
The test wiring harness should be used. For details refer
to .
|
|
|
|
(1)Disconnect joint connector (CAN2), and measure at the wiring harness side.
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the negative battery
terminal. For details refer to .
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between D-22 joint connector (CAN2) terminal No.8 (CAN_H) and
body earth <3000, 3800>
OK: 1 kΩ
or more
|
|
|
(4)Resistance between D-22 joint connector (CAN2) terminal No.10 (CAN_L)
and body earth <3000, 3800>
OK: 1 kΩ
or more
|
|
|
(5)Resistance between D-22 joint connector (CAN2) terminal No.6 (CAN_H) and
body earth <3200>
OK: 1 kΩ
or more
|
|
|
(6)Resistance between D-22 joint connector (CAN2) terminal No.17 (CAN_L)
and body earth <3200>
OK: 1 kΩ
or more
|
|
|
(7)
| caution |
Strictly observe the specified wiring harness repair procedure.
For details refer to .
|
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ
or more> Repair intermediate connector (D-230), or the wiring
harness between joint connector (CAN2) and the intermediate connector (D-230).
|
|
|
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|
|
NO : <Less than 1 kΩ> Go to Step 14.
|
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|
STEP 14. M.U.T.-III CAN bus diagnostics [transfer-ECU connector
disconnected]
|
|
|
(1)Disconnect transfer-ECU connector D-124, and diagnose by using the M.U.T.-III.
|
|
(2)Diagnose CAN bus lines, and check if M.U.T.-III screen is as shown in the illustration.
Q.
Does M.U.T.-III screen correspond to the illustration?
Check the intermediate connector (D-224), and repair if necessary. If the intermediate
connector is in good condition, repair the wiring harness between joint connector (CAN2) and
the transfer-ECU connector.
Check the transfer-ECU connector, and repair if necessary. If the transfer-ECU
connector is in good condition, replace the transfer-ECU.
|
|
|
STEP 15. Check the CAN line between joint connector (CAN1) and the
combination meter. Resistance measurement at D-03 joint connector (CAN1).
|
|
|
| caution |
A digital multimeter should be used. For details refer to .
|
|
|
|
| caution |
The test wiring harness should be used. For details refer
to .
|
|
|
|
(1)Disconnect joint connector (CAN1), and measure at the wiring harness side.
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the negative battery
terminal. For details refer to .
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between D-03 joint connector (CAN1) terminal No.3 (CAN_H) and
body earth <3000, 3200-LHD, 3800>
OK: 1 kΩ
or more
|
|
|
(4)Resistance between D-03 joint connector (CAN1) terminal No.14 (CAN_L)
and body earth <3000, 3200-LHD, 3800>
OK: 1 kΩ
or more
|
|
|
(5)Resistance between D-03 joint connector (CAN1) terminal No.1 (CAN_H) and
body earth <3200-RHD>
OK: 1 kΩ
or more
|
|
|
(6)Resistance between D-03 joint connector (CAN1) terminal No.12 (CAN_L)
and body earth <3200-RHD>
OK: 1 kΩ
or more
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ
or more> Go to Step 16.
|
|
|
|
|
|
<Less than 1 kΩ> Repair the wiring harness between joint connector
(CAN1) and the combination meter connector.
|
|
|
|
|
|
STEP 16. Check CAN line between joint connector (CAN1) and the ETACS-ECU.
Resistance measurement at D-03 joint connector (CAN1).
|
|
|
| caution |
A digital multimeter should be used. For details refer to .
|
|
|
|
| caution |
The test wiring harness should be used. For details refer
to .
|
|
|
|
(1)Disconnect joint connector (CAN1), and measure at the wiring harness side.
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the negative battery
terminal. For details refer to .
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between D-03 joint connector (CAN1) terminal No.6 (CAN_H) and
body earth
OK: 1 kΩ
or more
|
|
|
(4)Resistance between D-03 joint connector (CAN1) terminal No.17 (CAN_L)
and body earth
OK: 1 kΩ
or more
|
|
|
(5)
| caution |
Strictly observe the specified wiring harness repair procedure.
For details refer to .
|
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ
or more> Go to Step 19.
|
|
|
|
|
|
<Less than 1 kΩ> Go to Step 17.
|
|
|
|
|
|
STEP 17. M.U.T.-III CAN bus diagnostics [ETACS-ECU connector
disconnected]
|
|
|
(1)Disconnect ETACS-ECU connector D-420, and diagnose by using the M.U.T.-III.
|
|
(2)Diagnose CAN bus lines, and check if M.U.T.-III screen is as shown in the illustration.
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between joint connector (CAN2) and the ETACS-ECU connector.
Go to Step 18.
|
|
|
STEP 18. M.U.T.-III CAN bus diagnostics (retest the system)
|
|
|
Diagnose CAN bus lines, and check if M.U.T.-III screen shows normal state.
|
|
|
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.
|
|
|
|
|
|
STEP 19. Check the CAN line between joint connector (CAN1) and the
centre display. Resistance measurement at D-03 joint connector (CAN1).
|
|
|
| caution |
A digital multimeter should be used. For details refer to .
|
|
|
|
| caution |
The test wiring harness should be used. For details refer
to .
|
|
|
|
(1)Disconnect joint connector (CAN1), and measure at the wiring harness side.
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the negative battery
terminal. For details refer to .
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between D-03 joint connector (CAN1) terminal No.4 (CAN_H) and
body earth
OK: 1 kΩ
or more
|
|
|
(4)Resistance between D-03 joint connector (CAN1) terminal No.15 (CAN_L)
and body earth
OK: 1 kΩ
or more
|
|
|
(5)
| caution |
Strictly observe the specified wiring harness repair procedure.
For details refer to .
|
|
|
|
Q.
Is the check result normal?
|
|
|
YES <Vehicles with auto lamp or security alarm> : <1 kΩ
or more> Go to Step 21.
|
|
|
|
|
|
YES <Vehicles without auto lamp or security alarm> : <1 kΩ
or more> Go to Step 23.
|
|
|
|
|
|
NO : <Less than 1 kΩ> Go to Step 20.
|
|
|
|
|
|
STEP 20. M.U.T.-III CAN bus diagnostics [centre display connector
disconnected]
|
|
|
(1)Disconnect centre display connector D-106, and diagnose by using the M.U.T.-III.
|
|
(2)Diagnose CAN bus lines, and check if M.U.T.-III screen is as shown in the illustration.
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between joint connector (CAN1) and the centre display
connector.
Check the centre display connector, and repair if necessary. If the centre display
connector is in good condition, replace the centre display.
|
|
|
STEP 21. Check the CAN line between joint connector (CAN1) and the
CAN converter-ECU. Resistance measurement at D-03 joint connector (CAN1).
|
|
|
| caution |
A digital multimeter should be used. For details refer to .
|
|
|
|
| caution |
The test wiring harness should be used. For details refer
to .
|
|
|
|
(1)Disconnect joint connector (CAN1), and measure at the wiring harness side.
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the negative battery
terminal. For details refer to .
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between D-03 joint connector (CAN1) terminal No.7 (CAN_H) and
body earth
OK: 1 kΩ
or more
|
|
|
(4)Resistance between D-03 joint connector (CAN1) terminal No.18 (CAN_L)
and body earth
OK: 1 kΩ
or more
|
|
|
(5)
| caution |
Strictly observe the specified wiring harness repair procedure.
For details refer to .
|
|
|
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Q.
Is the check result normal?
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YES <vehicles with ASTC> : <1 kΩ
or more> Go to Step 23.
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YES <3200 (vehicles without ASTC)> : <1 kΩ
or more> Go to Step 25.
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YES <3000 (vehicles without ASTC), 3800 (vehicles without ASTC)> : <1 kΩ
or more> Go to Step 27.
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<Less than 1 kΩ> Go to Step 22.
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STEP 22. M.U.T.-III CAN bus diagnostics [CAN converter-ECU
connector disconnected]
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(1)Disconnect CAN converter-ECU connector D-252, and diagnose by using the M.U.T.-III.
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(2)Diagnose CAN bus lines, and check if M.U.T.-III screen is as shown in the illustration.
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between joint connector (CAN1) and the CAN converter-ECU
connector.
Check the CAN converter-ECU connector, and repair if necessary. If the CAN converter-ECU
connector is in good condition, replace the CAN converter-ECU.
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STEP 23. Check the CAN line between joint connector (CAN1) and the
steering wheel sensor. Resistance measurement at D-03 joint connector (CAN1).
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|
| caution |
A digital multimeter should be used. For details refer to .
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|
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|
| caution |
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)
| caution |
When measuring the resistance, disconnect the negative battery
terminal. For details refer to .
|
Ensure that the negative battery terminal is disconnected.
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(3)Resistance between D-03 joint connector (CAN1) terminal No.2 (CAN_H) and
body earth
OK: 1 kΩ
or more
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(4)Resistance between D-03 joint connector (CAN1) terminal No.13 (CAN_L)
and body earth
OK: 1 kΩ
or more
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(5)
| caution |
Strictly observe the specified wiring harness repair procedure.
For details refer to .
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|
Q.
Is the check result normal?
|
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|
YES <3000, 3800> : <1 kΩ
or more> Go to Step 27.
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YES <3200> : <1 kΩ
or more> Go to Step 25.
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NO <3800 and 3200> : <Less than 1 kΩ> Go to Step 24.
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STEP 24. M.U.T.-III CAN bus diagnostics [steering wheel sensor
connector disconnected]
|
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|
(1)Disconnect steering wheel sensor connector D-308, and diagnose by using the M.U.T.-III.
|
|
(2)Diagnose CAN bus lines, and check if M.U.T.-III screen is as shown in the illustration.
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between joint connector (CAN1) and the steering wheel
sensor connector.
Check the steering wheel sensor connector, and repair if necessary. If the steering
wheel sensor connector is in good condition, replace the steering wheel sensor.
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STEP 25. Check the CAN line between joint connector (CAN1) and the
immobilizer-ECU. Resistance measurement at D-03 joint connector (CAN1).
|
|
|
| caution |
A digital multimeter should be used. For details refer to .
|
|
|
|
| caution |
The test wiring harness should be used. For details refer
to .
|
|
|
|
(1)Disconnect joint connector (CAN1), and measure at the wiring harness side.
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the negative battery
terminal. For details refer to .
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between D-03 joint connector (CAN1) terminal No.5 (CAN_H) and
body earth
OK: 1 kΩ
or more
|
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|
(4)Resistance between D-03 joint connector (CAN1) terminal No.16 (CAN_L)
and body earth
OK: 1 kΩ
or more
|
|
|
(5)
| caution |
Strictly observe the specified wiring harness repair procedure.
For details refer to .
|
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ
or more> Go to Step 27.
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|
|
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|
<Less than 1 kΩ> Go to Step 26.
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|
STEP 26. M.U.T.-III CAN bus diagnostics [immobilizer-ECU connector
disconnected]
|
|
|
(1)Disconnect immobilizer-ECU connector D-126, and diagnose by using the M.U.T.-III.
|
|
(2)Diagnose CAN bus lines, and check if M.U.T.-III screen is as shown in the illustration.
Q.
Does M.U.T.-III screen correspond to the illustration?
Repair the wiring harness between joint connector (CAN1) and the immobilizer-ECU
connector.
Check the immobilizer-ECU connector, and repair if necessary. If the immobilizer-ECU
connector is in good condition, replace the immobilizer-ECU.
|
|
|
STEP 27. Check the CAN line between joint connector (CAN1) and the
diagnosis connector. Resistance measurement at D-03 joint connector (CAN1).
|
|
|
| caution |
A digital multimeter should be used. For details refer to .
|
|
|
|
| caution |
The test wiring harness should be used. For details refer
to .
|
|
|
|
(1)Disconnect joint connector (CAN1), and measure at the wiring harness side.
|
|
|
(2)
| caution |
When measuring the resistance, disconnect the negative battery
terminal. For details refer to .
|
Ensure that the negative battery terminal is disconnected.
|
|
|
(3)Resistance between D-03 joint connector (CAN1) terminal No.1 (CAN_H) and
body earth <LHD>
OK: 1 kΩ
or more
|
|
|
(4)Resistance between D-03 joint connector (CAN1) terminal No.12 (CAN_L)
and body earth <LHD>
OK: 1 kΩ
or more
|
|
|
(5)Resistance between D-03 joint connector (CAN1) terminal No.3 (CAN_H) and
body earth <RHD>
OK: 1 kΩ
or more
|
|
|
(6)Resistance between D-03 joint connector (CAN1) terminal No.14 (CAN_L)
and body earth <RHD>
OK: 1 kΩ
or more
|
|
|
(7)
| caution |
Strictly observe the specified wiring harness repair procedure.
For details refer to .
|
|
|
|
Q.
Is the check result normal?
|
|
|
<1 kΩ
or more> Repair the intermediate connector, or the wiring harness
between joint connector (CAN1) and the intermediate connector (D-230).
|
|
|
|
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|
<Less than 1 kΩ> Repair the diagnosis connector, or the wiring harness
between joint connector (CAN1) and the diagnosis connector.
|
|
|
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|
|
STEP 28. M.U.T.-III CAN bus diagnostics [resistor <vehicles without
ASTC>
or ASTC-ECU <vehicles with ASTC>
connector disconnected]
|
|
|
(1)Disconnect resistor connector D-42 <vehicles without ASTC>
or
ASTC-ECU connector D-223 <vehicles with ASTC>
and diagnose by using the M.U.T.-III.
|
|
(2)Diagnose CAN bus lines, and check if M.U.T.-III screen is as shown in the illustration.
Q.
Does M.U.T.-III screen correspond to the illustration?
Go to Step 30.
Go to Step 29.
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|
|
STEP 29. M.U.T.-III CAN bus diagnostics (retest the system)
|
|
|
Diagnose CAN bus lines, and check if M.U.T.-III screen shows normal state.
|
|
|
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 resistor <vehicles without ASTC>
or ASTC-ECU <vehicles
with ASTC>
connector, and repair if necessary. If the resistor <vehicles without ASTC>
or
ASTC-ECU <vehicles with ASTC>
connector is in good condition, replace the
resistor <vehicles without ASTC>
or ASTC-ECU <vehicles with ASTC>.
|
|
|
|
|
|
STEP 30. M.U.T.-III CAN bus diagnostics (retest the system)
|
|
|
Diagnose CAN bus lines, and check if M.U.T.-III screen shows normal state.
|
|
|
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 combination meter connector, and repair if necessary. If the combination
meter connector is in good condition, replace the combination meter.
|
|
|
|