Inspection Procedure 3: When the selector lever is moved to the "R" position during the rear wiper operation, the rear wiper does not operate at the continuous mode.

caution

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

OPERATION

The ETACS-ECU determines whether the shift position is at the "R" or not according to the shift position signal which is sent by EV-ECU.

COMMENTS ON TROUBLE SYMPTOM

If the rear wiper does not operate continuously when the selector lever is moved to the R position during the rear wiper operation, the shift position signal circuit or the ETACS-ECU may be defective.

PROBABLE CAUSES

The ETACS-ECU may be defective
Damaged harness wires and connectors
Malfunction of the EV-ECU

DIAGNOSIS PROCEDURE

STEP 1. Check the operation of the rear wiper.

Check that the rear wiper system works normally by operating the rear wiper switch.

Q. Is the check result normal?

	Go to step 2.

	Refer to Inspection Procedure 1 "Rear wiper does not work at all ."? Refer to .

STEP 2. M.U.T.-III CAN bus diagnostics.

Use the M.U.T.-III to diagnose the CAN bus lines.

Q. Is the CAN bus normal?

	Go to step 3.

	Repair the CAN bus lines. (Refer to GROUP 54C - Troubleshooting .)

STEP 3. M.U.T.-III diagnosis code.

Check if an ETACS-related diagnosis code is set.

Q. Is the diagnosis code set?

	Diagnose the ETACS.(Refer to GROUP 54A - ETACS, Trouble Symptom Chart .)

	Go to step 4.

STEP 4. Use M.U.T.-III to confirm a diagnosis code of other systems.

Check if the bus-off diagnosis code is set to the EV-ECU.

Q. Is the diagnosis code set?

	A poor connection, open circuit or other intermittent malfunction is present in the CAN bus lines between the EV-ECU and the ETACS-ECU.Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points, - How to Cope with Intermittent Malfunctions .)

	Go to step 5.

STEP 5. Check the trouble symptom.

Check that the rear wiper operates continuously when the selector lever is moved to the R position during the rear wiper operation.

Q. Is the check result normal?

	Intermittent malfunction. Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points, - How to Cope with Intermittent Malfunctions .)

	Replace the ETACS-ECU.

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