INSPECTION PROCEDURE H-3: When the shift lever is moved to "R" position during the rear wiper operation, the rear wiper does not operate at the continuous mode. <M/T>


caution Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.


COMMENTS ON TROUBLE SYMPTOM
If the rear wiper does not operate consecutively when the shift lever is moved to the R position during the rear wiper operation, the input signal circuit to the back-up lamp switch ("R" position) or the ETACS-ECU may be defective.

POSSIBLE CAUSES

  • Malfunction of the back-up lamp switch
  • Malfunction of the ETACS-ECU
  • Damaged harness wires and connectors

Step 1. Confirm the operation of the rear wiper.
Check that the rear wiper work normally.

Q. Is the check result normal?
Go to Step 2.
Refer to Inspection Procedure H-1 "The rear wiper does not work at all ."

Step 2. Pulse check
Check the input signal, which are related to the R (reverse) gear-linked rear wiper operation.
System switch
 Check condition
Back-up lamp switch
 When the ignition switch is turned ON and the shift lever is moved to the R position.
OK: The M.U.T.-III sounds or the voltmeter needle fluctuates.

Q. Is the check result normal?
Go to Step 3.
Refer to inspection procedure P-3 "The back-up lamp switch signal is not received ."

Step 3. Retest the system.
Check that the rear wiper operates consecutively when the shift lever is moved to the R position during the rear wiper operation.

Q. Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
Replace the ETACS-ECU.