Inspection Procedure

WARNING: This page is about a different car, the 2008 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT RADIO RECEIVER

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

Standard voltage

VOLTAGE SPECIFICATION

Tester Connection	Condition	Specified Condition
MCVD - Body ground	Ignition switch on (ACC)	4 to 6 V

NG: REPLACE RADIO RECEIVER

Fig 1: Identifying Radio Receiver Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - BODY GROUND)

Disconnect the radio receiver connector.

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

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
TSW- - MGND	Always	Below 1 Ω
TSW- - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 2: Disconnecting Radio Receiver Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (MICROPHONE - RADIO RECEIVER)

Disconnect the microphone connector.

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

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
MCVD - ACC1	Always	Below 1 Ω
MIC+ - MIC+	Always	Below 1 Ω
MIC- - MIC-	Always	Below 1 Ω
ACC1 - Body ground	Always	10 kΩ or higher
MIC+ - Body ground	Always	10 kΩ or higher
MIC- - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 3: Identifying Microphone And Radio Receiver Connector Terminals

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