Stereo Component Amplifier Power Source Circuit: Procedure

INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY

Disconnect the stereo component amplifier assembly connector.

Fig 1: Identifying Stereo Component Amplifier Assembly Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard Resistance

Tester Connection	Condition	Specified Condition
F23-2 (GND) - Body ground	Always	Below 1 Ω
F23-6 (GND2) - Body ground	Always	Below 1 Ω

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

Standard Voltage

Tester Connection	Condition	Specified Condition
F23-1 (+B) - F23-2 (GND)*1	Power switch off	11 to 14 V
F23-3 (+B2) - F23-2 (GND)	Power switch off	11 to 14 V

TEXT IN ILLUSTRATION

*A	for 15 Speakers
*1	Front view of wire harness connector (to Stereo Component Amplifier Assembly)

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