[54C] SMART WIRING SYSTEM (SWS) USING SWS MONITOR <Hong Kong spec.> - - SYMPTOM PROCEDURES - INSPECTION PROCEDURE A-6: Communication with the sunroof motor assembly (sunroof-ECU) is not possible. | PRINT PAGE / INDEX / PRIOR / NEXT

INSPECTION PROCEDURE A-6: Communication with the sunroof motor assembly (sunroof-ECU) is not possible.
| CAUTION Whenever the ECU is replaced, ensure that the power supply circuit, the grounding circuit and the communication circuit are normal.
| COMMENTS ON TROUBLE SYMPTOM The sunroof motor assembly, the power supply circuit or the communication circuit for that assembly may be defective.
| POSSIBLE CAUSES Malfunction of the sunroof motor assembly Damaged harness wires and connectors
| DIAGNOSIS PROCEDURE
| Step 1. ECU check on the SWS monitor Check that the power supply and earth lines to the ETACS-ECU and the SWS communication lines are normal. Ignition switch: OFF ECUS TO BE CHECKED ETACS OK: "OK" is displayed on the "ETACS ECU" menu. Q: Is the check result normal? YES: Go to Step 2. NO: Refer to Inspection Procedure A-3 "Communication with the ETACS-ECU is not possible" .
| Step 2. Connector check: D-09 sunroof motor assembly connector Q: Is the check result normal? YES: Go to Step 3. NO: Repair the defective connector.
| Step 3. Measure the voltage at D-09 sunroof motor assembly connector. Disconnect the connector, and measure at the wiring harness side. Voltage between D-09 sunroof motor assembly connector terminal No.1 and body earth OK: Battery positive voltage Q: Is the check result normal? YES: Go to Step 5. NO: Go to Step 4.
| Step 4. Check the wiring harness between D-09 sunroof motor assembly connector terminal No.1 and fusible link (5). NOTE: Prior to the wiring harness inspection, check intermediate connectors A-14, C-126 and C-218, and repair if necessary. Check the power supply line for open circuit. Q: Is the check result normal? YES: The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ). NO: Repair the wiring harness.
| Step 5. Measure the voltage at D-09 sunroof motor assembly connector. Disconnect the connector, and measure at the wiring harness side. Turn the ignition switch to the ON position. Voltage between D-09 sunroof motor assembly connector terminal No.2 and body earth OK: Battery positive voltage Q: Is the check result normal? YES: Go to Step 7. NO: Go to Step 6.
| Step 6. Check the wiring harness between D-09 sunroof motor assembly connector terminal No.2 and ignition switch (IG2). NOTE: Prior to the wiring harness inspection, check junction block connectors C-203 and C-210, and repair if necessary. Check the power supply line to the ignition switch (IG2) for open circuit. Q: Is the check result normal? YES: The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction ). NO: Repair the wiring harness.
| Step 7. Measure the resistance at D-09 sunroof motor assembly connector. Disconnect the connector, and measure at the wiring harness side. Continuity between D-09 sunroof motor assembly connector terminal No.5 and body earth OK: 2Ω or less Q: Is the check result normal? YES: Go to Step 9. NO: Go to Step 8.
| Step 8. Check the wiring harness between D-09 sunroof motor assembly connector terminal No.5 and body earth. NOTE: Prior to the wiring harness inspection, check intermediate connector C-218, and repair if necessary. Check the earth wires for open circuit. Q: Is the check result normal? YES: The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction ). NO: Repair the wiring harness.
| Step 9. Connector check: C-310 column switch connector Q: Is the check result normal? YES: Go to Step 10. NO: Repair the defective connector.
| Step 10. Check the wiring harness between D-09 sunroof motor assembly connector terminal No.10 and C-310 column switch connector terminal No.3. NOTE: Prior to the wiring harness inspection, check joint connector C-02 and intermediate connector C-218, and repair if necessary. Check the communication lines for open circuit. Q: Is the check result normal? YES: Go to Step 11. NO: Repair the wiring harness.
| Step 11. ECU check on the SWS monitor Check that the power supply and earth lines to the sunroof motor assembly and the SWS communication lines are normal. Turn the ignition switch to the ON position. ECUS TO BE CHECKED SUNROOF ECU OK: "OK" is displayed on the "SUNROOF ECU" menu. Q: Is the check result normal? YES: The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction ). NO: Replace the sunroof motor assembly.

[54C] SMART WIRING SYSTEM (SWS) USING SWS MONITOR <Hong Kong spec.> - - SYMPTOM PROCEDURES - INSPECTION PROCEDURE A-6: Communication with the sunroof motor assembly (sunroof-ECU) is not possible. | PRINT PAGE / INDEX / PRIOR / NEXT

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