Inspection Procedure 6: The intermittent wiper interval is not changed according to the vehicle speed.

caution

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

OPERATION

The ETACS-ECU calculates the intermittent wiper interval according to the vehicle speed signal which is sent by the ABS-ECU.

COMMENTS ON TROUBLE SYMPTOM

If the intermittent wiper interval does not depend on the vehicle speed, the input circuit of the vehicle speed signal and the ETACS-ECU may be defective.Alternatively, the vehicle speed-dependent wiper may be set to "Disabled" by using the customisation function.

PROBABLE CAUSES

The CAN bus line is defective.
ETACS-ECU malfunction
Damaged harness wires and connectors
The ABS-ECU is defective.

DIAGNOSIS PROCEDURE

STEP 1. Check the trouble symptom.

Check that the windshield intermittent wiper interval can be adjusted by operating the windshield intermittent wiper volume control.

Q. Is the check result normal?

	Go to step 2.

	Refer to Inspection Procedure 5 "The windshield intermittent wiper interval cannot be adjusted by operating the windshield intermittent wiper volume control" .

STEP 2. Check the ETACS customisation function.

By the ETACS customisation function, confirm that "vehicle speed dependent wiper function" has been enabled.

Q. Is the check result normal?

	Go to step 3.

	By the ETACS customisation function, enable the "vehicle speed dependent wiper function". (Refer to .)

STEP 3. M.U.T.-III CAN bus diagnostics.

Use M.U.T.-III to perform the CAN bus diagnosis.

Q. Is the check result normal?

	Go to step 4.

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

STEP 4. 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 5.

STEP 5. Use M.U.T.-III to confirm a diagnosis code of other systems.

Check if a diagnosis code is set to the ASC-ECU.

Q. Is the diagnosis code set?

	Carry out troubleshooting for the ASC-ECU.(Refer to GROUP 35C - Diagnosis Code Chart .)

	Go to step 6.

STEP 6. Check the trouble symptom.

Check that the intermittent wiper interval depends on the vehicle speed.

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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