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 ETACS-ECU
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. Check the operation by operating the intermittent wiper volume.
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 G-5 "The intermittent wiper interval can not be adjusted by operating the windshield intermittent wiper volume control ."

Step 2. Customize function by using the SWS monitor
Use the SWS monitor customize function to confirm that "SPEED SEN WIP" is set to "W.FUNCTION".

Q. Is the check result normal?
Go to Step 3.
Use the SWS monitor customize function to set the "SPEED SEN WIP" to "W.FUNCTION" (Refer to ).

Step 3. ECU check by using the SWS monitor.
Check that the power supply and earth lines to the ETACS-ECU and the SWS communication lines are normal.

  • Ignition switch: ON
ECU TO BE CHECKED
  • ETACS-ECU
OK: "OK" is displayed on the "ETACS-ECU" menu.

Q. Is the check result normal?
Go to Step 4.
Refer to Inspection Procedure A-3 "Communication with the ETACS-ECU is not possible ."

Step 4. ETACS ANALOG data by using the SWS monitor.
Check the ETACS-ECU input signal related to the vehicle speed-dependent intermittent wiper interval.

  • Set the simulated vehicle speed at approximately 10km/h.
Item No.
 Item name
 Normal condition
Item 03
 SPEED SENSOR
 8 to 10 km/h
OK: Normal condition is displayed.

Q. Is the check result normal?
Go to Step 5.
Refer to inspection procedure P-22 "The vehicle speed signal is not received ."

Step 5. Retest the system.
(1)Replace the ETACS-ECU.
(2)Check that the vehicle speed-dependent intermittent wiper system should work normally.

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 combination mater.