Inspection Procedure

WARNING: This page is about a different car, the 2008 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: The vehicle is equipped with an SRS such as the airbags. Before servicing (including removal or installation of parts), be sure to read the precautionary notice for the airbag system (See SYSTEM DESCRIPTION ).

INSPECT STEERING PAD SWITCH ASSEMBLY

Disconnect the a1 steering pad switch connector.

Fig 1: Identifying A1 Steering Pad Switch Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
AU1 - EAU	No switch is pushed	Approx. 100 kΩ
AU1 - EAU	SEEK+ switch: push	0 to 2.5 Ω
AU1 - EAU	SEEK- switch: push	Approx. 0.3 kΩ
AU1 - EAU	VOL+ switch: push	Approx. 1 kΩ
AU1 - EAU	VOL- switch: push	Approx. 3.1 kΩ
AU2 - EAU	No switch is pushed	Approx. 100 kΩ
AU2 - EAU	MODE switch: push	0 to 2.5 Ω
AU2 - EAU (*1)	VOICE switch: push	Approx. 3.1 kΩ
AU2 - EAU (*1)	ON HOOK switch: push	Approx. 0.3 kΩ
AU2-EAU (*1)	OFF HOOK switch: push	Approx. 1 kΩ
HINT: *1: for Premium sound models

NG: REPLACE STEERING PAD SWITCH ASSEMBLY

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - RADIO RECEIVER)

Disconnect the E49 receiver connector.
Disconnect the E7 cable connector.

Measure the resistance of the wire harness side connectors.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
E49-7 (SW1) - E7-6 (AU1)	Below 1 Ω
E49-8 (SW2) - E7-5 (AU2)	Below 1 Ω
E49-6 (SWG) - E7-4 (EAU)	Below 1 Ω
E49-7 (SW1) - Body ground	10 kΩ or higher
E49-8 (SW2) - Body ground	10 kΩ or higher
E49-6 (SWG) - Body ground	10 kΩ or higher

Fig 2: Identifying E49 Receiver Connector And E7 Cable Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

INSPECT SPIRAL CABLE SUB-ASSEMBLY

Disconnect the cable connectors.

Measure the resistance of the cable.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
E7-4 (EAU) - a1-8 (EAU)	Below 1 Ω
E7-6 (AU1) - a1-10 (AU1)	Below 1 Ω
E7-5 (AU2) - a1-9 (AU2)	Below 1 Ω

Fig 3: Identifying Spiral Cable Sub-Assembly Connector Terminals

NG: REPLACE SPIRAL CABLE SUB-ASSEMBLY

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