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Home >> Mitsubishi >> 2011 >> Eclipse Spyder L4-2.4L (4G69) >> Repair and Diagnosis >> Body and Frame >> Body Control Systems >> Testing and Inspection >> Symptom Related Diagnostic Procedures >> Rear Wiper and Washer >> Inspection Procedure H-1

Inspection Procedure H-1




INSPECTION PROCEDURE H-1: Rear Wiper and Washer: Rear wiper does not work at all.

NOTE:
This troubleshooting procedure requires use of scan tool MB991958 and SWS monitor kit MB991813. For details on how to use the SWS monitor, refer to "How to use SWS monitor How to Use SWS Monitor."


















CIRCUIT OPERATION

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

- The ETACS-ECU operates the rear wiper according to the following switches:
- Ignition switch (ACC)
- Rear wiper switch

TECHNICAL DESCRIPTION (COMMENT)

If the rear wiper does not work normally, the input circuit system from the switches, the rear wiper motor, the column switch (windshield wiper and windshield washer switch) or the ETACS-ECU may be defective (refer to "CIRCUIT OPERATION").

TROUBLESHOOTING HINTS

- The rear wiper motor may be defective
- The column switch (windshield wiper and washer switch) may be defective
- The ETACS-ECU may be defective
- The wiring harness may be damaged or the connectors may have loose, corroded or damaged terminals, pushed back in the connector

DIAGNOSIS

Required Special Tools:

- MB991223: Harness Set
- MB992006: Extra Fine Probe
- MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: Vehicles communication interface (V.C.I.)
- MB991827: M.U.T.-III USB cable
- MB991911: M.U.T.-III Main harness B
- MB991813: SWS monitor kit
- MB991806: SWS monitor cartridge
- MB991812: SWS monitor harness (for column-ECU)
- MB991922: Probe harness

STEP 1. Use scan tool MB991958 to select "ECU COMM CHK" on the SWS monitor display.

Check the following ECUs:

- ETACS-ECU
- Column-ECU









(1)
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 MB991910 before connecting special tool MB991812. Be sure to connect special tool MB991806 after turning on special tool MB991824.

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."

.....Select "Interactive Diagnosis."

.....Select "System select."

.....Select "SWS."

.....Select "SWS MONITOR."

.....Select "ECU COMM Check."
(4)Scan tool MB991958 should show "OK" on the "ECU COMM Check" menus for both the "ETACS ECU" and the "COLUMN ECU" menus.

Q. Are "OK" displayed on the "ETACS ECU" and "COLUMN ECU" menu?

"OK" are displayed for all the items : Go to Step 2.

"NG" is displayed on the "ETACS ECU" menu : Refer to Inspection Procedure A-3 "Communication with ETACS-ECU is not possible Inspection Procedure A-3."

"NG" is displayed on the "COLUMN ECU" menu : Refer to Inspection Procedure A-2 "Communication with column switch (column-ECU) is not possible Inspection Procedure A-2."

STEP 2. Check the input signal by using "FUNCTION DIAG." menu of the SWS monitor.

Check the input signals from the following switches:

- Ignition switch: ACC
- Rear wiper switch: INT









(1)Operate scan tool MB991958 according to the procedure below to display "REAR WIPER."

.....Select "Interactive Diagnosis."

.....Select "System select."

.....Select "SWS."

.....Select "SWS MONITOR."

.....Select "Function Diag."

.....Select "REAR WIPER."
(2)Check that normal conditions are displayed for the items described in the table below.





Q. Are normal conditions displayed on the "REAR WIPER SW" and "IG SW (ACC)"?

Normal conditions are displayed for all the items : Go to Step 3.

Normal condition is not displayed for "REAR WIPER SW" : Refer to Inspection Procedure M-7 "ETACS-ECU does not receive a signal from the rear wiper switch Inspection Procedure M-7."

Normal condition is not displayed for "IG SW (ACC)" : Refer to Inspection Procedure M-1 "ETACS-ECU does not receive a signal from the ignition switch (ACC) Inspection Procedure M-1."

STEP 3. Check the rear wiper motor connector F-03 for loose, corroded or damaged terminals, or terminals pushed back in the connector.





Q. Is rear wiper motor connector F-03 in good condition?

YES Go to Step 4.

NO Repair or replace the damaged component(s). Harness Connector Inspection. Verify that the rear wiper works normally.

STEP 4. Check the rear wiper motor.

Pump and Switch Inspection.

Q. Is the rear wiper motor in good condition?

YES Go to Step 5.
NO Replace the rear wiper motor. Verify that the rear wiper works normally.
STEP 5. Check the ground circuit to the rear wiper motor. Measure the resistance at the rear wiper motor connector F-03.





(1)Disconnect rear wiper motor connector F-03 and measure the resistance available at the wiring harness side of the connector.





(2)Measure the resistance value between terminal 1 and ground.

- The resistance should be 2 ohms or less.

Q. Is the measured resistance 2 ohms or less?

YES Go to Step 7.

NO Go to Step 6.

STEP 6. Check the wiring harness between rear wiper motor connector F-03 (terminal 1) and ground.

- Check the ground wire for open circuit.





Q. Is the wiring harness between rear wiper motor connector F-03 (terminal 1) and ground in good condition?

YES No action is necessary and testing is complete.

NO The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Verify that the rear wiper works normally.

STEP 7. Check ETACS-ECU connector C-217 for loose, corroded or damaged terminals, or terminals pushed back in the connector.





Q. Is ETACS-ECU connector C-217 in good condition?

YES Go to Step 8.

NO Repair or replace the damaged component(s). Harness Connector Inspection. Verify that the rear wiper works normally.

STEP 8. Check the wiring harness between rear wiper motor connector F-03 (terminal 2) and ETACS-ECU connector C-217 (terminal 16).

- Check the communication lines for open circuit and short circuit.













NOTE:
Also check junction block connector C-208 and intermediate connector F-02 for loose, corroded, or damaged terminals, or terminals pushed back in the junction block connector C-208 or intermediate connector F-02 is damaged, repair or replace the damaged component(s) as described in Harness Connector Inspection Harness Connector Inspection.

Q. Is the wiring harness between rear wiper motor connector F-03 (terminal 2) and ETACS-ECU connector C-217 (terminal 16) in good condition?

YES Replace the ETACS-ECU. Verify that the rear wiper should work normally.

NO The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Verify that the rear wiper works normally.

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