Inspection Procedure

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU RH - COMBINATION SWITCH ASSEMBLY)

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

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
J26-4 (HEAD) - Body ground	Always	10 to 14 V

Fig 1: Identifying J26 Combination Switch Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to step 4

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU RH - COMBINATION SWITCH)

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

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
J26-4 (HEAD) - Body ground	Light control switch is off	10 to 14 V
J26-4 (HEAD) - Body ground	Light control switch position is in HEAD position	Below 1 V

Fig 2: Identifying J26 Combination Switch Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to step 3

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

CHECK HARNESS AND CONNECTOR (COMBINATION SWITCH ASSEMBLY - BODY GROUND)

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
J26-5 (E) - Body ground	Always	Below 1 Ω

Fig 3: Identifying J26 Combination Switch Connector Terminals

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE WINDSHIELD WIPER SWITCH ASSEMBLY

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU RH - COMBINATION SWITCH)

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
J74-23 (HEAD) - J26-4 (HEAD)	Always	Below 1 Ω
J74-23 (HEAD) - Body ground	Always	10 kΩ or higher

Fig 4: Identifying J74 ECU Connector Terminals

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE MAIN BODY ECU RH (COWL SIDE J/B RH)