[54D] SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR <Except for Hong Kong spec.> - - SYMPTOM PROCEDURES - WINDSHIELD WIPER AND WASHER - INSPECTION PROCEDURE G-1: The windshield wipers does not work at all. | PRINT PAGE / INDEX / PRIOR / NEXT

WINDSHIELD WIPER AND WASHER

INSPECTION PROCEDURE G-1: The windshield wipers does not work at all.
| CAUTION Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.
| COMMENTS ON TROUBLE SYMPTOM The windshield wiper motor, the column switch or the front-ECU may be defective.
| POSSIBLE CAUSES Malfunction of the windshield wiper motor Malfunction of the column switch Malfunction of the front-ECU Damaged harness wires and connectors
| DIAGNOSIS PROCEDURE
| Step 1. Check the diagnosis code. When the ignition switch is turned to the LOCK (OFF) position, check that the ETACS-ECU does not set the diagnosis code. Q: Is the diagnosis code set? YES: Refer to diagnosis code chart . NO: Go to Step 2.
| Step 2. Pulse check Check the input signals below which are related to the windshield wiper.
System switch | Check condition
--- | ---
Ignition switch (ACC) | When turned from the LOCK (OFF) position to the ACC position.
Windshield mist wiper switch | When the switch is turned from off to on.
OK: The MUT-II/III sounds or the voltmeter needle fluctuates. Q: Is the check result normal? All the signals are received normally: Go to Step 3. The ignition switch (ACC) signal is not received.: Refer to Inspection Procedure P-1 "The ignition switch (ACC) signal is not received ." Windshield mist wiper switch signal is not received.: Refer to Inspection Procedure P-6 "The column switch (windshield wiper/washer and rear wiper/washer switch) signal is not received ."
| Step 3. Connector check: B-07 windshield wiper motor connector Q: Is the check result normal? YES: Go to Step 4. NO: Repair the connector.
| Step 4. Check the windshield wiper motor assembly. Refer to GROUP 51 - Windshield wiper. Q: Is the check result normal? YES: Go to Step 5 NO: Replace the windshield wiper motor assembly.
| Step 5. Measure the resistance at the B-07 windshield wiper motor connector. Disconnect the connector, and measure at the wiring harness side. Continuity between B-07 windshield wiper motor connector terminal No.4 <RH drive vehicles> or No.5 <LH drive vehicles> and body earth OK: 2Ω or less Q: Is the check result normal? YES: Go to Step 7. NO: Go to Step 6.
| Step 6. Check the wiring harness between B-07 windshield wiper motor connector terminal No.4 and body earth. NOTE: Prior to the wiring harness inspection, check the junction connector C-17 <LH drive vehicles>, 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 7. Connector check: A-12X front-ECU connector Q: Is the check result normal? YES: Go to Step 8. NO: Repair the connector.
| Step 8. Measure the voltage at the A-12X front-ECU connector. Remove the front-ECU, and measure at the junction block side. Ignition switch: ACC Check the voltage between the A-12X front-ECU connector terminal No.28 and body earth. OK: Battery positive voltage Q: Is the check result normal? YES: Go to Step 10. NO: Go to Step 9.
| Step 9. Check the wiring harness between A-12X front-ECU connector terminal No.28 and the ignition switch (ACC). NOTE: Prior to the wiring harness inspection, check the junction block connectors C-202, C-203 and intermediate connectors C-116 and repair if necessary. Check the power supply line to the ignition switch (ACC) 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 10. Connector check: C-310 column switch connector Q: Is the check result normal? YES: Go to Step 11. NO: Repair the connector.
| Step 11. Check the wiring harness between C-310 column switch connector terminal No.8 and A-12X front-ECU connector terminal No.26. NOTE: Prior to the wiring harness inspection, check the intermediate connector C-116 and repair if necessary. Check the wiper backup circuit. Q: Is the check result normal? YES: Go to Step 12. NO: Repair the wiring harness.
| Step 12. Retest the system. The windshield wiper should now work normally at all. 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 front-ECU.

[54D] SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR <Except for Hong Kong spec.> - - SYMPTOM PROCEDURES - WINDSHIELD WIPER AND WASHER - INSPECTION PROCEDURE G-1: The windshield wipers does not work at all. | PRINT PAGE / INDEX / PRIOR / NEXT

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