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

INSPECT RADIO RECEIVER

Disconnect the radio receiver connector.

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

Standard Resistance

RESISTANCE SPECIFIED CONDITION

Tester Connection

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)

Volume+ switch: pushed

959.5 to 1060.5 Ω

E32-7 (SW1) - E32-6 (SWG)

Volume- 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

E32-8 (SW2) - E32-6 (SWG)

Voice switch: pushed⁽¹⁾

3049.5 to 3370.5 Ω

E32-8 (SW2) - E32-6 (SWG)

On Hook switch: pushed⁽¹⁾

313.5 to 346.5 Ω

E32-8 (SW2) - E32-6 (SWG)

Off Hook switch: pushed⁽¹⁾

959.5 to 1060.5 Ω

⁽¹⁾	for 7 Speakers

Fig 1: Identifying E32 Radio Receiver 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 STEERING PAD SWITCH ASSEMBLY

Disconnect the steering pad switch assembly connector.

Measure the resistance according to the values in the table below.

Fig 2: Identifying Steering Pad Switch Assembly Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard Resistance

RESISTANCE SPECIFIED CONDITION

Tester Connection

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)

Volume+ switch: pushed

959.5 to 1060.5 Ω

Y1-10 (AU1) - Y1-8 (EAU)

Volume- 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

Y1-9 (AU2) - Y1-8 (EAU)

Voice switch: pushed⁽¹⁾

3049.5 to 3370.5 Ω

Y1-9 (AU2) - Y1-8 (EAU)

ON HOOK switch: pushed⁽¹⁾

313.5 to 346.5 Ω

Y1-9 (AU2) - Y1-8 (EAU)

OFF HOOK switch: pushed⁽¹⁾

959.5 to 1060.5 Ω

⁽¹⁾	for 7 Speakers

NG: REPLACE STEERING PAD SWITCH ASSEMBLY (See REMOVAL )

OK: Go to Next Step

INSPECT SPIRAL CABLE

Disconnect the steering pad switch and spiral cable connectors.

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

Standard Resistance

RESISTANCE SPECIFIED CONDITION

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

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 pages shown in the brackets.

HINT:

Removal (See REMOVAL )
Installation (See INSTALLATION )

Fig 3: Identifying Y1 Steering Pad Switch And E10 Spiral Cable Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE SPIRAL CABLE (See REMOVAL )

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