Inspection Procedure

WARNING: This page is about a different car, the 2006 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.

CHECK HARNESS AND CONNECTOR (COMBINATION SWITCH ECU - BATTERY)

Disconnect the connector from the combination switch.

Fig 1: Identifying Terminals Of Combination Switch ECU Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

STANDARD VOLTAGE CONDITION CHART

Tester Connection	Condition	Specified Condition
D13-1 - Body ground	Always	10 to 14 V

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (IGNITION SWITCH CIRCUIT)

Fig 2: Identifying Terminals Of Ignition Switch Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

STANDARD VOLTAGE CONDITION CHART

Tester Connection	Condition	Specified Condition
D13-2 - Body ground	Ignition switch on (IG)	10 to 14 V
D13-2 - Body ground	Ignition switch off	Below 1 V

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

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

Fig 3: Identifying Terminals Of Combination Switch ECU Connector

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

STANDARD RESISTANCE CONDITION CHART

Tester Connection	Condition	Specified Condition
D13-5 - Body ground	Always	Below 1

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

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