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.

NOTE: The vehicle is equipped with an SRS (Supplemental Restraint System). Before servicing (including removal or installation of parts), be sure to read the precautionary notice for the Supplemental Restraint System (See PRECAUTION ).

INSPECT RADIO RECEIVER

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
1CH - GND	No switch is pushed	Approx. 100 kΩ
1CH - GND	+SEEK+ switch: push	Approx. 0 Ω
1CH - GND	SEEK- switch: push	Approx. 0.3 kΩ
1CH - GND	VOL+ switch: push	Approx. 1 kΩ
1CH - GND	VOL- switch: push	Approx. 3.2 kΩ
2CH - GND	No switch is pushed	Approx. 100 kΩ
2CH - GND	MODE switch: push	Approx. 0 Ω
2CH - GND (*1)	ON HOOK switch: push	Approx. 0.3 kΩ
2CH - GND (*1)	OFF HOOK switch: push	Approx. 1 kΩ
HINT: *1: for 12 Speaker System

NG: Go to step 2

Fig 1: Disconnecting Radio Receiver Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

INSPECT STEERING PAD SWITCH ASSEMBLY

Disconnect the steering pad switch assembly connector.

Fig 2: Identifying Steering Pad Switch Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
AU1 - EAU	No switch is pushed	Approx. 100 kΩ
AU1 - EAU	SEEK+ switch: push	Approx. 0 Ω
AU1 - EAU	SEEK- switch: push	Approx. 0.3 kΩ
AU1 - EAU	VOL+ switch: push	Approx. 1 kΩ
AU1 - EAU	VOL-switch: push	Approx. 3.2 kΩ
AU2 - EAU	No switch is pushed	Approx. 100 kΩ
AU2 - EAU	MODE switch: push	Approx. 0 Ω
AU2 - EAU (*1)	ON HOOK switch: push	Approx. 0.3 kΩ
AU2 - EAU (*1)	OFF HOOK switch: push	Approx. 1 kΩ
HINT: *1: for 12 Speaker System

NG: REPLACE STEERING PAD SWITCH ASSEMBLY

OK: Go to Next Step

INSPECT SPIRAL CABLE

Disconnect the spiral cable connector.

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

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
EAU - EAU	Always	Below 1 Ω
AU1 - AU1	Always	Below 1 Ω
AU2 - AU2	Always	Below 1 Ω

OK : REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL CABLE - RADIO RECEIVER)

Fig 3: Identifying Spiral Cable Connector Terminals

NG: REPLACE SPIRAL CABLE