Inspection Procedure

NOTE: The vehicle is equipped with an SRS (Supplemental Restraint System) which includes components such as airbags. 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 E43 radio receiver connector.

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

Measure the resistance.

Standard resistance

RESISTANCE SPECIFICATION

Tester connection	Condition	Specified condition
E43-7 (SW1) - E43-6 (SWG)	No switches pushed	Approximately 100 kΩ
E43-7 (SW1) - E43-6 (SWG)	SEEK+ switch pushed	Approximately 0 Ω
E43-7 (SW1) - E43-6 (SWG)	SEEK- switch pushed	Approximately 0.3 kΩ
E43-7 (SW1) - E43-6 (SWG)	VOL+ switch pushed	Approximately 1 kΩ
E43-7 (SW1) - E43-6 (SWG)	VOL- switch pushed	Approximately 3.2 kΩ
E43-8 (SW2) - E43-6 (SWG)	No switches pushed	Approximately 100 kΩ
E43-8 (SW2) - E43-6 (SWG)	MODE switch pushed	Approximately 0 Ω

Reconnect the radio receiver connector.

NG: Go to step 2

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

INSPECT STEERING PAD SWITCH ASSEMBLY

Disconnect the E17 steering pad switch assembly connector.

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

Measure the resistance.

Standard resistance

RESISTANCE SPECIFICATION

Tester connection	Condition	Specified condition
E17-12 (AU1) - E17-10 (EAU)	No switches pushed	Approximately 100 kΩ
E17-12 (AU1) - E17-10 (EAU)	SEEK+ switch pushed	Approximately 0 Ω
E17-12 (AU1) - E17-10 (EAU)	SEEK - switch pushed	Approximately 0.3 kΩ
E17-12 (AU1) - E17-10 (EAU)	VOL+ switch pushed	Approximately 1 kΩ
E17-12 (AU1) - E17-10 (EAU)	VOL- switch pushed	Approximately 3.2 kΩ
E17-11 (AU2) - E17-10 (EAU)	No switches pushed	Approximately 100 kΩ
E17-11 (AU2) - E17-10 (EAU)	MODE switch pushed	Approximately 0 Ω

Reconnect the steering pad switch assembly connector.

NG: REPLACE STEERING PAD SWITCH ASSEMBLY

OK: Go TO NEXT STEP

INSPECT SPIRAL CABLE

Disconnect the E17 steering pad switch assembly and spiral cable connectors.

Fig 3: Identifying Steering Pad Switch & Spiral Cable Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance.

Standard resistance

RESISTANCE SPECIFICATION

Tester connection	Specified condition
Terminal 10 (EAU) main switch side - EAU (E17-10)	Below 1 Ω
Terminal 12 (AU1) main switch side - AU1 (E17-12)	Below 1 Ω
Terminal 11 (AU2) main switch side - AU2 (E17-11)	Below 1 Ω

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:

See REMOVAL
See INSTALLATION

Reconnect the steering pad switch assembly connector.
Reconnect the spiral cable connector.

NG: REPLACE SPIRAL CABLE

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