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Home >> Mitsubishi >> 2002 >> Lancer O-Z Rally Edition L4-2.0L SOHC >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Information Bus >> Testing and Inspection >> Symptom Related Diagnostic Procedures >> Symptom Diagnostic Procedures >> F - Charts >> Inspection Procedure F-7

Inspection Procedure F-7

Windshield Wiper and Washer: Windshield Washer does not Work

Windshield Washer Motor Circuit:




Connectors:






NOTE: This troubleshooting requires use of scan tool MB991502 and SWS monitor kit MB991862. For details of how to use the SWS monitor, refer to "How to use SWS monitor".

CIRCUIT OPERATION
The windshield washer switch sends a signal through the column-ECU (incorporated in the column switch) to the front-ECU. If the column-ECU sends a windshield washer switch "ON" signal to the front-ECU, the front-ECU turns on the relay (incorporated in the front-ECU), thus causing the windshield washer motor to be turned on.

TECHNICAL DESCRIPTION (COMMENT)
If the windshield washer does not work normally, the windshield washer motor, the column switch (windshield wiper and washer switch) or the front- ECU may be defective.

TROUBLESHOOTING HINTS
- Malfunction of the windshield washer motor
- Malfunction of the column switch (windshield wiper and washer switch)
- Malfunction of the front-ECU
- Damaged harness wires or connectors

DIAGNOSIS

Required Special Tools:
- MB991223: Test Harness Set
- MB991502: Scan Tool (MUT-II)
- MB991862: SWS monitor kit

STEP 1. Check the windshield wiper.

Q: Does the windshield wiper operate normally?

YES: Go to Step 2.

NO: Refer to Inspection Procedure F-1 "Windshield wiper does not work at all."

STEP 2. Use scan tool to select "ECU CHECK" on the SWS monitor display.
Check the following ECUs:
- column-ECU
- front-ECU









CAUTION: To prevent damage to scan tool MB991502, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991502. Also connect SWS monitor kit MB991862 after turning on scan tool MB991502.

1. Connect scan tool MB991502 to the data link connector.
2. Connect SWS monitor kit MB991862 to the column switch connector.
3. When the ignition switch is turned to the "LOCK" (OFF) position, scan tool MB991502 should show "OK" on the "ECU CHECK" menu.

Q: Are "OK" displayed on the "COLUMN ECU" and "FRONT ECU"?
"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 impossible."
"NG" is displayed on the "FRONT ECU" menu : Refer to Inspection procedure A-4 "Communication with front- ECU is impossible."

STEP 3. Check the input signal by using service data of the SWS monitor.
Check the input signals from the following switches:
- ignition switch: ACC
- windshield washer switch: ON










Select "WIPER WASH" (FUNCTION DIAG.), and check that normal conditions are displayed on the items described in the table.

Q: Are normal conditions displayed on the "FRONT WASH.SW" and "FRONT ECU ACK"?

YES: Go to STEP 4.

NO:
- Normal condition is not displayed on the "FRONT WASH.SW: Replace the column switch. Check that the windshield washer works normally.
- Normal condition is not displayed on the "FRONT ECU ACK": Replace the front-ECU. Check that the windshield washer works normally.




STEP 4. Check the windshield washer motor.
1. Disconnect windshield washer motor connector A-22, and check at windshield washer motor connector side.
2. Fill the windshield washer tank with washer fluid.
3. When battery voltage is applied between terminals 1 and 2, washer fluid should gush out.

Q: Does the windshield washer motor operate normally?

YES: Go to Step 5.

NO: Replace the windshield washer motor. Check that the windshield washer works normally.




STEP 5. Check at windshield washer motor connector A-22 to check the windshield washer motor ground circuit.
1. Disconnect windshield washer motor connector A-22, and measure at the wiring harness side.
2. Measure the resistance value between terminal 1 and ground.
- The measured value should be 2 Ohm or less.

Q: Does the measured resistance value correspond with this range?

YES: Go to Step 8.

NO: Go to Step 6.




STEP 6. Check windshield washer motor connector A-22 for damage.

Q: Is windshield washer motor connector A-22 in good condition?

YES: Go to Step 7.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. Check that the windshield washer works normally.




STEP 7. Check the wiring harness between windshield washer motor connector A-22 and ground.

Q: Is the wiring harness between windshield washer motor connector A-22 and ground in good condition?

YES: No action to be taken.

NO: Repair the wiring harness. Check that the windshield washer works normally.







STEP 8. Check windshield washer motor connector A-22 and front-ECU connector A-11X for damage.

Q: Are windshield washer motor connector A-22 and front-ECU connector A-11X in good condition?

YES: Go to Step 9.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. Check that the windshield washer works normally.













STEP 9. Check the wiring harness between windshield washer motor connector A-22 and front-ECU connector A-11X.

NOTE: Also check intermediate connectors C-129 and C-111. If intermediate connectors C-111 or C-129 is damaged, repair or replace the connector as described in Harness Connector Inspection.

Q: Is the wiring harness between windshield washer motor connector A-22 and front-ECU connector A-11X in good condition?

YES: No action to be taken.

NO: Repair the wiring harness. Check that the windshield washer works normally.
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