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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 >> G - Charts >> Inspection Procedure G-7

Inspection Procedure G-7

Windshield Wiper and Washer: Windshield Washer does not Work.

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

Windshield Washer Motor Circuit Part 1:




Windshield Washer Motor Circuit Part 2:






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: 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 windshield wiper.

Q: Does the windshield wiper operate normally?

YES: Go to Step 2.

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

STEP 2. Use scan tool MB991958 to select "ECU COMM Check" on the SWS monitor display.
Check the following ECUs:
- Column-ECU
- Front-ECU

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. Turn the ignition switch to the "LOCK" (OFF) position.
3. Operate scan tool MB991958 according to the procedure below to display "ECU COMM Check."
a. Select "Interactive Diagnosis."
b. Select "System Select."
c. Select "SWS."
d. Select "SWS MONITOR."
e. Select "ECU COMM Check."

4. Scan tool MB991958 should show "OK" on the "ECU COMM Check" menus for both the "COLUMN ECU" and "FRONT ECU" menus.

Q: Are "OK" displayed on the "COLUMN ECU" and "FRONT ECU" menu?

"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 "FUNCTION DIAG." menu of the SWS monitor.
Check the input signals from the following switches:
- Ignition switch: ACC
- Windshield washer switch: ON







1. Operate the scan tool MB991958 according to the procedure below to display "F.WIPER WASH."
a. Select "Interactive Diagnosis."
b. Select "System select."
c. Select "SWS."
d. Select "SWS MONITOR."
e. Select "Function Diag."
f. Select "WIPER."
g. Select "F.WIPER WASH."




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

Q: Does the scan tool display the items "FRONT WASH.SW" and "FRONT ECU ACK" as normal condition?

Normal conditions displayed for all the items: Go to Step 4.

The scan tool does not show the respective normal condition for item "FRONT WASH. SW": Replace the column switch. Check that the windshield washer works normally.

The scan tool does not show the respective normal condition for item "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-33, 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-33 to check the windshield washer motor ground circuit.




1. Disconnect windshield washer motor connector A-33, 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 8.

NO: Go to Step 6.




STEP 6. Check windshield washer motor connector A-33 for damage.

Q: Is windshield washer motor connector A-33 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-33 (terminal 2) and ground.

Q: Is the wiring harness between windshield washer motor connector A-33 (terminal 2) 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-33 and front-ECU connector A-11X for damage.

Q: Are windshield washer motor connector A-33 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-33 (terminal 1) and front-ECU connector A-11X (terminal 21).

NOTE: Also check intermediate connector C-06. If intermediate connectors C-06 is damaged, repair or replace the connector as described in Harness Connector Inspection.

Q: Is the wiring harness between windshield washer motor connector A-33 (terminal 1) and front-ECU connector A-11X (terminal 21) 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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