Radio Receiver Power Source Circuit (TO 12/2010): Procedure

WARNING: This page is about a different car, the 2011 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT RADIO RECEIVER ASSEMBLY

Disconnect the radio receiver assembly connector.

Fig 1: Identifying Radio Receiver Assembly Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard Resistance

FOR 12 SPEAKERS

Tester Connection	Condition	Specified Condition
E31-20 (GND) - Body ground	Always	Below 1 Ω

FOR 9 SPEAKERS

Tester Connection	Condition	Specified Condition
E32-7 (GND) - Body ground	Always	Below 1 Ω

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

Standard Voltage

FOR 12 SPEAKERS

Tester Connection	Condition	Specified Condition
E31-1 (B) - E31-20 (GND)	Always	11 to 14 V
E31-11 (ACC) - E31-20 (GND)	Ignition switch ACC	11 to 14 V

FOR 9 SPEAKERS

Tester Connection	Condition	Specified Condition
E32-4 (B) - E32-7 (GND)	Always	11 to 14 V
E32-3 (ACC) - E32-7 (GND)	Ignition switch ACC	11 to 14 V

TEXT IN ILLUSTRATION

*A	for 12 Speakers
*B	for 9 Speakers
*a	Front view of wire harness connector (to Radio Receiver 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