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Home >> Mitsubishi >> 2004 >> Eclipse V6-3.0L SOHC >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Information Bus >> Testing and Inspection >> Symptom Related Diagnostic Procedures >> Symptom Diagnostic Procedures >> H - Charts >> Inspection Procedure H-4

Inspection Procedure H-4

Rear Wiper and Washer: Rear Washer does not Operate.

NOTE: This troubleshooting requires use of scan tool MB991958 and SWS monitor kit MB991862. For details of how to use the SWS monitor, refer to "How to use SWS monitor." How To Use SWS Monitor

Rear Washer Motor Power Supply Circuit Part 1:




Rear Washer Motor Power Supply Circuit Part 2:






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

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

TROUBLESHOOTING HINTS
- Malfunction of the rear washer motor
- Malfunction of the column switch (windshield wiper and washer switch)
- Malfunction of the ETACS-ECU

DIAGNOSIS

Required Special Tools:
- MB991223: Harness Set
- MB991958: Scan Tool (MUT-III Sub Assembly)
- MB991824: Vehicles communication interface
- MB991827: MUT-III USB cable
- MB991911: MUT-III Main harness B
- MB991813: SWS monitor kit
- MB991806: SWS monitor cartridge
- MB991812: SWS monitor harness (for column-ECU)
- MB991922: Probe harness

STEP 1. Check the rear wiper.

Q: Does the rear wiper operate?

YES: Go to Step 2.

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

STEP 2. Check the input signal by using "FUNCTION DIAG." menu of the SWS monitor.
Set each switch to the following condition before checking input signals from the rear washer switch:
- Ignition switch: ACC
- Rear washer switch: ON

CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Connect special tool MB991911 before connecting special tool MB991812. Be sure to connect special tool MB991806 after turning on special tool MB991824.







1. Connect the special tool. Refer to "How to connect SWS monitor." How to Connect SWS Monitor
2. Operate the scan tool MB991958 according to the procedure below to display "REAR WASHER."
a. Select "System select."
b. Select "SWS."
c. Select "SWS MONITOR."
d. Select "Function Diag."
e. Select "REAR WIPER."
f. Select "REAR WASHER."




3. Check that normal conditions are displayed on the items described in the given table.

Q: Are normal conditions displayed?

YES: Go to Step 3.

NO: Refer to Inspection Procedure O-8 "ETACS-ECU does not receive a signal from the rear washer switch."

STEP 3. Check the rear washer motor.




1. Disconnect rear washer motor connector A-34.
2. Fill the washer tank with washer fluid.




3. When battery voltage is applied between terminals 1 and 2, washer fluid should gush out.

Q: Does the rear washer motor operate normally?

YES: Go to Step 4.

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

STEP 4. Check at rear washer motor connector A-34 to check the rear washer motor ground circuit.




1. Disconnect rear washer motor connector A-34, and measure at the wiring harness side.




2. Measure the resistance value between terminal 2 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 7.

NO: Go to Step 5.




STEP 5. Check rear washer motor connector A-34 for damage.

Q: Is rear washer motor connector A-34 in good condition?

YES: Go to Step 6.

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




STEP 6. Check the wiring harness between rear washer motor connector A-34 (terminal 2) and ground.

Q: Is the wiring harness between rear washer motor connector A-34 (terminal 2) and ground in good condition?

YES: No action to be taken.

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







STEP 7. Check rear washer motor connector A-34 and ETACS-ECU connector C-117 for damage.

Q: Are rear washer motor connector A-34 and ETACS-ECU connector C-117 in good condition?

YES: Go to Step 8.

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










STEP 8. Check the wiring harness between rear washer motor connector A-34 (terminal 1) and ETACS-ECU connector C-117 (terminal 23).

NOTE: Also check intermediate connector C-94. If intermediate connector C-94 is damaged, repair or replace the connector as described in Harness Connector Inspection.

Q: Is the wiring harness between rear washer motor connector A-34 (terminal 1) and ETACS-ECU connector C-117 (terminal 23) in good condition?

YES: Replace the ETACS-ECU. Check that the rear washer works normally.

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