Inspection Procedure P-9

INSPECTION PROCEDURE P-9: ETACS-ECU does not receive an auto-stop signal from the rear wiper motor.

Rear Wiper Auto-stop Signal Input Part 1:

Rear Wiper Auto-stop Signal Input Part 2:

CIRCUIT OPERATION
The ETACS-ECU makes the rear wiper stop at the predetermined park position according to the auto-stop signal from the rear wiper motor.

TECHNICAL DESCRIPTION (COMMENT)
If this signal is not normal, the rear wiper does not stop at the predetermined park position.

TROUBLESHOOTING HINTS
- The rear wiper motor may be defective
- The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector
- The ETACS-ECU may be defective

DIAGNOSIS
Required Special Tool:
- MB991223: Harness Set
- MB992006: Extra Fine Probe

STEP 1. Check the rear wiper.

Q: Does the rear wiper motor operate (however, the rear wiper does not stop at the predetermined park position)?

YES: Go to Step 2.

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




STEP 2. Check rear wiper motor connector F-06 and contact connector F-13 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Are rear wiper motor connector F-06 and contact connector F-13 in good condition?

YES: Go to Step 3.

NO: Repair or replace the damaged component(s). Refer to Harness Connector Inspection. If the rear wiper operates normally, a correct auto-stop signal is sent from the rear wiper motor.




STEP 3. Check the contact connector.
Disconnect contact connector F-13, and check at the equipment side. Refer to Body, Window Glass - Glass Hatch.

Q: Is the contact connector in good condition?

YES: Go to Step 4.

NO: Replace the contact connector. If the rear wiper operates normally, a correct auto-stop signal is sent from the rear wiper motor.

STEP 4. Check the rear wiper motor.




1. Disconnect rear wiper motor connector F-06.




2. While the rear wiper motor is running, disconnect the battery to stop the motor.




3. When the battery is connected as shown, the motor should run again and stop at the predetermined park position.

Q: Does the rear wiper motor operate normally?

YES: Go to Step 5.

NO: Replace the rear wiper motor. If the rear wiper operates normally, a correct auto-stop signal is sent from the rear wiper motor.




STEP 5. Check ETACS-ECU connectors C-218 and C-219 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Are ETACS-ECU connectors C-218 and C-219 in good condition?

YES: Go to Step 6.

NO: Repair or replace the damaged component(s). Refer to Harness Connector Inspection. If the rear wiper operates normally, a correct auto-stop signal is sent from the rear wiper motor.







STEP 6. Check the wiring harness between rear wiper motor connector F-06 (terminals 2 and 4) and ETACS-ECU connector C-218 (terminal 70) or C-219 (terminal 17).

NOTE: Also check intermediate connector F-02 and junction block connector C-204 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector F-02 or junction block connector C-204 are damaged, repair or replace the damaged component(s) as described in Harness Connector Inspection.

Q: Is the wiring harness between rear wiper motor connector F-06 (terminals 2 and 4) and ETACS-ECU connector C-218 (terminal 70) or C-219 (terminal 17) in good condition?

YES: Replace the ETACS-ECU. When the ETACS-ECU is replaced, register the encrypted code. Refer to Encrypted Code Registration Criteria Table in Antitheft and Alarm Systems. If the rear wiper operates normally, a correct auto-stop signal is sent from the rear wiper motor.

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. If the rear wiper operates normally, a correct auto-stop signal is sent from the rear wiper motor.