Inspection Procedure

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 notices for the Supplemental Restraint System (See AIRBAG SYSTEM ).

INSPECT NAVIGATION RECEIVER ASSEMBLY

Disconnect the navigation receiver assembly connector.

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

Standard Resistance

STANDARD RESISTANCE REFERENCE CHART

Tester Connection	Switch Condition	Specified Condition
E32-7 (SW1) - E32-6 (SWG)	No switch is pushed	95 to 105 kΩ
E32-7 (SW1) - E32-6 (SWG)	SEEK+ switch: pushed	Below 2.5 Ω
E32-7 (SW1) - E32-6 (SWG)	SEEK- switch: pushed	313.5 to 346.5 Ω
E32-7 (SW1) - E32-6 (SWG)	VOL+ switch: pushed	959.5 to 1060.5 Ω
E32-7 (SW1) - E32-6 (SWG)	VOL-switch: pushed	3049.5 to 3370.5 Ω
E32-8 (SW2) - E32-6 (SWG)	No switch is pushed	95 to 105 kΩ
E32-8 (SW2) - E32-6 (SWG)	MODE switch: pushed	Below 2.5 Ω

Fig 1: Identifying E32 Navigation Receiver Assembly Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to step 2

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

INSPECT SPIRAL CABLE

Disconnect the steering pad switch assembly and spiral cable connectors.

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

Standard Resistance

STANDARD RESISTANCE REFERENCE CHART

Tester Connection	Condition	Specified Condition
Y1-8 (EAU) - E10-4 (EAU)	Center	Below 1 Ω
	2.5 rotations to the left
	2.5 rotations to the right
Y1-10 (AU1) - E10-6 (AU1)	Center	Below 1 Ω
	2.5 rotations to the left
	2.5 rotations to the right
Y1-9 (AU2) - E10-5 (AU2)	Center	Below 1 Ω
	2.5 rotations to the left
	2.5 rotations to the right

Fig 2: Identifying Y1 Steering Pad Switch Assembly And E10 Spiral Cable Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NOTE: The spiral cable is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable may prevent the airbag from deploying. Be sure to read the page shown in the brackets.

HINT:

Removal (See REMOVAL )
Installation (See INSTALLATION )
NG: REPLACE SPIRAL CABLE (See REMOVAL )

OK: Go to Next Step

INSPECT STEERING PAD SWITCH ASSEMBLY

Disconnect the steering pad switch assembly connector.

Fig 3: Identifying Y1 Steering Pad Switch Assembly Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard Resistance

STANDARD RESISTANCE REFERENCE CHART

Tester Connection	Switch Condition	Specified Condition
Y1-10 (AU1) - Y1-8 (EAU)	No switch is pushed	95 to 105 kΩ
Y1-10 (AU1) - Y1-8 (EAU)	SEEK+ switch: pushed	Below 2.5 Ω
Y1-10 (AU1) - Y1-8 (EAU)	SEEK-switch: pushed	313.5 to 346.5 Ω
Y1-10 (AU1) - Y1-8 (EAU)	VOL+ switch: pushed	959.5 to 1060.5 Ω
Y1-10 (AU1) - Y1-8 (EAU)	VOL- switch: pushed	3049.5 to 3370.5 Ω
Y1-9 (AU2) - Y1-8 (EAU)	No switch is pushed	95 to 105 kΩ
Y1-9 (AU2) - Y1-8 (EAU)	MODE switch: pushed	Below 2.5 Ω

NG: REPLACE STEERING PAD SWITCH ASSEMBLY (See REMOVAL )

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