[54E] SMART WIRING SYSTEM (SWS) USING SWS MONITOR <Except for Hong Kong spec.> - - SYMPTOM PROCEDURES - WINDSHIELD WIPER AND WASHER - INSPECTION PROCEDURE G-7: The windshield washer does not work. | PRINT PAGE / INDEX / PRIOR / NEXT

INSPECTION PROCEDURE G-7: The windshield washer does not work.
| CAUTION Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.
| COMMENTS ON TROUBLE SYMPTOM The windshield washer motor, the column switch or the front-ECU may be defective.
| POSSIBLE CAUSES Malfunction of the windshield washer motor Malfunction of the column switch Malfunction of the front-ECU Damaged harness wires and connectors
| DIAGNOSIS PROCEDURE
| Step 1. Check the operation of the windshield wipers. Check that the windshield wipers work normally. Q: Is the check result normal? YES: Go to Step 2. NO: Refer to Inspection Procedure G-1 "The windshield wipers does not work at all."
| Step 2. ECU check on the SWS monitor Check that the power supply and earth lines to the column switch (column-ECU) and the front-ECU and the SWS communication lines are normal. Turn the ignition switch to the ACC position. ECUS TO BE CHECKED COLUMN ECU FRONT ECU OK: "OK" are displayed for all the items Q: Is the check result normal? "OK" are displayed for all the items: Go to Step 3. "NG" is displayed on the "COLUMN ECU" menu.: Refer to Inspection Procedure A-2 "Communication with column switch (column-ECU) is not possible ." "NG" is displayed on the "FRONT ECU" menu.: Refer to Inspection Procedure A-4 "Communication with front-ECU is not possible ."
| Step 3. Function diagnosis by using the SWS monitor Check the SWS communication signal, which are related to the windshield washer function. <Selected item> F.WIPER WASH Turn the ignition switch to the ACC position. Windshield washer switch: ON
Item No. | Item name | Normal condition
--- | --- | ---
Item 09 | FRONT WASH. SW | ON
Item 31 | IG SW (ACC) | ON
Item 70 | FRONT ECU ACK | NORMAL ACK or HI-BEAM ACK
OK: Normal conditions are displayed for all the items. Q: Is the check result normal? Normal conditions displayed for all the items: Go to Step 4. Normal condition is not displayed for item No.09: Replace the column switch. Normal condition is not displayed for item No.31: Refer to Inspection Procedure P-1 "The ignition switch (ACC) signal is not received ." Normal condition is not displayed for item No.70: Replace the front-ECU.
| Step 4. Connector check: A-26 windshield washer motor connector Q: Is the check result normal? YES: Go to Step 5. NO: Repair the connector.
| Step 5. Check the windshield washer motor assembly. Refer to GROUP 51 - Windshield washer. Q: Is the check result normal? YES: Go to Step 6. NO: Replace the windshield washer motor.
| Step 6. Measure the resistance at the A-26 windshield washer motor connector. Disconnect the connector, and measure at the wiring harness side. Continuity between A-26 windshield washer motor connector terminal No.1 and body earth OK: 2Ω or less Q: Is the check result normal? YES: Go to Step 8. NO: Go to Step 7.
| Step 7. Check the wiring harness between A-26 windshield washer motor connector terminal No.1 and body earth. 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 8. Connector check: A-12X front-ECU connector Q: Is the check result normal? YES: Go to Step 9. NO: Repair the connector.
| Step 9. Check the wiring harness between A-26 windshield washer motor connector terminal No.2 and A-12X front-ECU connector terminal No.31. Check the output lines for open circuit. Q: Is the check result normal? YES: Go to Step 10. NO: Repair the wiring harness.
| Step 10. Retest the system. The windshield washer should now work normally. 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.

[54E] SMART WIRING SYSTEM (SWS) USING SWS MONITOR <Except for Hong Kong spec.> - - SYMPTOM PROCEDURES - WINDSHIELD WIPER AND WASHER - INSPECTION PROCEDURE G-7: The windshield washer does not work. | PRINT PAGE / INDEX / PRIOR / NEXT

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