IG Power Source Circuit: Procedure

CHECK HARNESS AND CONNECTOR (HEADLIGHT CLEANER CONTROL RELAY - BATTERY AND BODY GROUND)

Disconnect the A44 headlight cleaner control relay connector.

Fig 1: Identifying Harness And Connector (Headlight Cleaner Control Relay - Battery And Body Ground)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard Voltage

Tester Connection	Condition	Specified Condition
A44-3 (IG) - Body ground	Power switch off	Below 1 V
A44-3 (IG) - Body ground	Power switch on (IG)	11 to 14 V

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

Standard Resistance

Tester Connection	Condition	Specified Condition
A44-4 (E) - Body ground	Always	Below 1 Ω

TEXT IN ILLUSTRATION

*1	Front view of wire harness connector (to Headlight Cleaner Control Relay)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK → See step 2

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE