Wiper Switch (HI Speed) Circuit

WIPER AND WASHER: WIPER AND WASHER SYSTEM: Wiper Switch (HI Speed) Circuit
- Wiper Switch (HI Speed) Circuit

DESCRIPTION

The front light ECU receives the HI position signal of the wiper switch to operate the wiper motor at HI speed. Even if the ECU malfunctions, its circuit structure enables it to operate the wiper in HI operation mode.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK FRONT LIGHT ECU (2S SIGNAL)

(a) Measure the voltage according to the value(s) in the table below.





Standard voltage:





OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
NG -- Continue to next step.

2. INSPECT WINDSHIELD WIPER SWITCH (COMBINATION SWITCH)

(a) Measure the resistance according to the value(s) in the table below.





Standard resistance:





NG -- REPLACE WINDSHIELD WIPER SWITCH Removal
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH - FRONT LIGHT ECU AND BODY GROUND)

(a) Disconnect the L25 switch connector.





(b) Disconnect the A51 ECU connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE