Code No.U1515 No-Bus activity error (LIN) <Vehicles with lighting control sensor>
TROUBLE JUDGMENT
PROBABLE CAUSES
- Malfunction of the ETACS-ECU
- Malfunction of the slave ECU
- LIN bus lines shorted to power supply
- LIN bus lines shorted to earth
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STEP 1. Check the following connectors.
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Check the following connectors:
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- C-301 and C-316 <vehicles with sunroof> ETACS-ECU connectors
- C-212 Column switch connector
- E-18 Power window main switch connector
- E-05 Front power window sub switch connector
- E-24 Rear power window sub switch (LH) connector
- E-10 Rear power window sub switch (RH) connector
- D-04 Sunroof motor assembly connector <vehicles with sunroof>
- D-131 Lighting control sensor connector <vehicles with lighting control sensor>
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Q.
Are all the connectors in good condition?
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 Go to Step 2.
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 Repair the defective connector.
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STEP 2. Check the following wiring harness.
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Check the wiring harness between the following connectors:
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- Wiring harness from C-301 ETACS-ECU connector terminal No.1 to C-212 column switch connector terminal No.3.
- Wiring harness from C-301 ETACS-ECU connector terminal No.1 to E-18 power window main switch connector terminal No.4.
- Wiring harness from C-301 ETACS-ECU connector terminal No.1 to E-05 front power window sub switch connector terminal No.6.
- Wiring harness from C-301 ETACS-ECU connector terminal No.1 to E-24 rear power window sub switch (LH) connector terminal No.6.
- Wiring harness from C-301 ETACS-ECU connector terminal No.1 to E-10 rear power window sub switch (RH) connector terminal No.6.
- Wiring harness from C-316 ETACS-ECU connector terminal No.1 to D-04 sunroof motor assembly connector terminal No.7. <vehicles with sunroof>
- Wiring harness from C-316 ETACS-ECU connector terminal No.1 to D-131 lighting control sensor connector terminal No.3. <vehicles with lighting control sensor>
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| note |
Prior to the wiring harness inspection, check intermediate connectors C-35, C-114, C-129, D-23 and D-36, and repair if necessary.
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Q.
Are all the wiring harness wires in good condition?
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Go to Step 3.
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Repair the wiring harness.
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STEP 3. Measure the voltage at the LIN bus lines.
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Check the LIN bus lines for short to power supply.
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(1)Disconnect all the connectors which are connecter to the LIN bus lines.
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(2)Turn the ignition switch from "LOCK" (OFF) to "ON" position.
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(3)Measure the voltage between C-212 column switch connector terminal No.3 and earth.
- The voltmeter needle does not swing.
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If the LIN bus lines are short to power supply, the voltmeter indicates a constant value.
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(4)Measure the voltage between D-04 sunroof motor assembly connector terminal No.7 and earth. <vehicles with sunroof>
- The voltmeter needle does not swing.
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If the LIN bus lines are short to power supply, the voltmeter indicates a constant value.
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Q.
Is the check result normal?
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Go to Step 4.
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Repair the wiring harness.
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STEP 4. Measure the resistance at the LIN bus lines.
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Check the LIN bus lines for short to earth.
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(1)Disconnect all the connectors which are connecter to the LIN bus lines.
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(2)Measure the resistance value between C-212 column switch connector terminal No.3 and earth.
- No continuity (1 kΩ or more)
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(3)Measure the resistance value between D-04 sunroof motor assembly connector terminal No.7 and earth. <vehicles with sunroof>
- No continuity (1 kΩ or more)
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Q.
Is the check result normal?
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Go to Step 5.
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Repair the wiring harness.
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STEP 5. Check the column switch.
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Disconnect C-212 column switch connector, and recheck whether diagnosis code No. U1515 is set.
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(1)Connect all the relevant ECUs, and disconnect C-212 column switch connector only.
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(2)Erase the diagnosis code.
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(3)Turn the ignition switch from "LOCK" (OFF) to "ON" position.
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(4)Check whether diagnosis code No. U1515 is set.
| note |
If diagnosis code No. U1515 is not set, diagnosis code No. U1109 is set because the column switch is disconnected. This is normal.
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(5)Turn the ignition switch to the "LOCK" (OFF) position.
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Q.
Is diagnosis code No. U1515 set?
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Reconnect the column switch connector, and go to Step 6.
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Replace the column switch.
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STEP 6. Check the power window main switch.
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Disconnect E-18 power window main switch connector, and recheck whether diagnosis code No. U1515 is set.
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(1)Connect all the relevant ECUs, and disconnect E-18 power window main switch connector only.
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(2)Erase the diagnosis code.
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(3)Turn the ignition switch from "LOCK" (OFF) to "ON" position.
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(4)Check whether diagnosis code No. U1515 is set.
| note |
If diagnosis code No. U1515 is not set, diagnosis code No. U0215 is set because the power window main switch is disconnected. This is normal.
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(5)Turn the ignition switch to the "LOCK" (OFF) position.
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Q.
Is diagnosis code No. U1515 set?
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Reconnect the power window main switch connector, and go to Step 7.
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Replace the power window main switch.
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STEP 7. Check the front power window sub switch.
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Disconnect E-05 front power window sub switch connector, and recheck whether diagnosis code No. U1515 is set.
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(1)Connect all the relevant ECUs, and disconnect E-05 front power window sub switch connector only.
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(2)Erase the diagnosis code.
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(3)Turn the ignition switch from "LOCK" (OFF) to "ON" position.
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(4)Check whether diagnosis code No. U1515 is set.
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If diagnosis code No. U1515 is not set, diagnosis code No. U0216 is set because the front power window sub switch is disconnected. This is normal.
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(5)Turn the ignition switch to the "LOCK" (OFF) position.
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Q.
Is diagnosis code No. U1515 set?
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Reconnect the front power window sub switch connector, and go to Step 8.
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Replace the front power window sub switch.
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STEP 8. Check the rear power window sub switch (LH).
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Disconnect E-24 rear power window sub switch (LH) connector, and recheck whether diagnosis code No. U1515 is set.
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(1)Connect all the relevant ECUs, and disconnect E-24 rear power window sub switch (LH) connector only.
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(2)Erase the diagnosis code.
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(3)Turn the ignition switch from "LOCK" (OFF) to "ON" position.
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(4)Check whether diagnosis code No. U1515 is set.
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If diagnosis code No. U1515 is not set, diagnosis code No. U0217 is set because the rear power window sub switch (LH) is disconnected. This is normal.
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(5)Turn the ignition switch to the "LOCK" (OFF) position.
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Q.
Is diagnosis code No. U1515 set?
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Reconnect the rear power window sub switch (LH) connector, and go to Step 9.
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Replace the rear power window sub switch (LH).
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STEP 9. Check the rear power window sub switch (RH).
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Disconnect E-10 rear power window sub switch (RH) connector, and recheck whether diagnosis code No. U1515 is set.
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(1)Connect all the relevant ECUs, and disconnect E-10 rear power window sub switch (RH) connector only.
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(2)Erase the diagnosis code.
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(3)Turn the ignition switch from "LOCK" (OFF) to "ON" position.
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(4)Check whether diagnosis code No. U1515 is set.
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If diagnosis code No. U1515 is not set, diagnosis code No. U0218 is set because the rear power window sub switch (RH) is disconnected. This is normal.
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(5)Turn the ignition switch to the "LOCK" (OFF) position.
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Q.
Is diagnosis code No. U1515 set?
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Reconnect the rear power window sub switch (RH) connector, and go to Step 10.
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Replace the rear power window sub switch (RH).
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STEP 10. Check the sunroof motor assembly.
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Disconnect D-04 sunroof motor assembly connector, and recheck whether diagnosis code No. U1515 is set.
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(1)Connect all the relevant ECUs, and disconnect D-04 sunroof motor assembly connector only.
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(2)Erase the diagnosis code.
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(3)Turn the ignition switch from "LOCK" (OFF) to "ON" position.
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(4)Check whether diagnosis code No. U1515 is set.
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If diagnosis code No. U1515 is not set, diagnosis code No. U0169 is set because the sunroof motor assembly is disconnected. This is normal.
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(5)Turn the ignition switch to the "LOCK" (OFF) position.
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Q.
Is diagnosis code No. U1515 set?
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Reconnect the sunroof motor assembly connector, and go to Step 11.
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Replace the sunroof motor assembly.
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STEP 11. Check the lighting control sensor.
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Disconnect D-131 lighting control sensor connector, and recheck whether diagnosis code No. U1515 is set.
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(1)Connect all the relevant ECUs, and disconnect D-131 lighting control sensor connector only.
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(2)Erase the diagnosis code.
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(3)Turn the ignition switch from "LOCK" (OFF) to "ON" position.
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(4)Check whether diagnosis code No. U1515 is set.
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If diagnosis code No. U1515 is not set, diagnosis code No. U0231 is set because the sunroof motor assembly is disconnected. This is normal.
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(5)Turn the ignition switch to the "LOCK" (OFF) position.
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Q.
Is diagnosis code No. U1515 set?
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Reconnect the lighting control sensor, and go to Step 12.
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Replace the lighting control sensor.
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STEP 12. Recheck for diagnosis code.
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Check again if the diagnosis code is set to the ETACS-ECU.
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(1)Erase the diagnosis code.
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(2)Turn the ignition switch from "LOCK" (OFF) to "ON" position.
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(3)Check whether diagnosis code No. U1515 is set.
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(4)Turn the ignition switch to the "LOCK" (OFF) position.
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Q.
Is the diagnosis code set?
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Replace the ETACS-ECU.
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The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction  ).
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