WIPER AND WASHER SYSTEM - Wiper Motor Power Source Circuit

DESCRIPTION

This circuit provides power to the front wiper motor and operates the main body ECU LH (cowl side J/B LH).

Wiper And Washer System - Wiper Motor Power Source Circuit. WIPER AND WASHER. Lexus IS250 IS220d GSE20 ALE20

1.CHECK MAIN BODY ECU LH (COWL SIDE J/B LH)

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

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

2.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU LH (COWL SIDE J/B LH) - BODY GROUND)

Disconnect the LD and main body ECU LH (cowl side J/B LH) connectors.

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

Standard resistance:
Tester Connection Condition Specified Condition
LD-3 (GND) - Body ground Always Below 1 Ω
LD-9 (SGND) - Body ground Always Below 1 Ω
LD-8 (SGND) - Body ground Always Below 1 Ω

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU LH (COWL SIDE J/B LH) - BATTERY)

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

Standard voltage:
Tester Connection Condition Specified Condition
LD-13 (IG) - Body ground Engine switch off Below 1 V
Engine switch on (IG) 10 to 14 V
LM-1 (WIG) - Body ground Always 10 to 14 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE