INSPECTION PROCEDURE G-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.

COMMENTS ON TROUBLE SYMPTOM

The ETACS-ECU calculates the intermittent wiper interval according to the vehicle speed signal which is sent by the engine-A/T-ECU.
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.

POSSIBLE CAUSES

Malfunction of the vehicle speed signal (engine-A/T-ECU)

Malfunction of the ETACS-ECU

Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. Retest the system.

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

Q: Is the check result normal?

YES: Go to Step 2

.
NO: Refer to Inspection Procedure G-5 "The intermittent wiper interval can not be adjusted by operating the windshield intermittent wiper volume control

Step 2. Check the adjustment function.

Check that "SPEED SEN WIP" is set to "W.FUNCTION" by using the adjustment function.

Q: Is the check result normal?

YES: Go to Step 3

.
NO: Set "SPEED SEN WIP" to "W.FUNCTION" by using the adjustment function. (Refer to

Step 3. SWS monitor data list

Enter a simulated vehicle speed when the windshield intermittent wiper interval adjusting knob position is slow side.

NOTE: Also check that the wiper interval changes smoothly when the vehicle is accelerated from 0 km/h to 25 km/h.

Item No.	Item name	Normal condition
ITEM 37	INT WIPER TIME	18.0 - 12.0 s

OK: Normal condition is displayed.

Q: Is the check result normal?

YES: Go to Step 4

.
NO: Refer to Inspection Procedure P-16 "The vehicle speed signal is not received

Step 4. Retest the system.

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

Q: Is the check result normal?

YES: The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction

).
NO: Replace the ETACS-ECU.