Inspection Procedure

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

CAUTION: 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 SRS (See PRECAUTION ).

INSPECT RADIO RECEIVER ASSEMBLY

Disconnect the I3 radio receiver assembly connector.

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Switch Condition	Specified Condition
I3-7 (SW1) - I3-6 (SWG)	No switch is pushed	100 kΩ or higher
	Seek+ switch: push	Below 1 Ω
	Seek- switch: push	312 to 345 Ω
	Volume* switch: push	950 to 1050 Ω
	Volume- switch: push	2954 to 3265 Ω
I3-8 (SW2) - I3-6 (SWG)	No switch is pushed	100 kΩ or higher
	MODE switch: push	Below 1 Ω
	On Hook switch: push	312 to 345 Ω
	Off Hook switch: push	950 to 1050 Ω

Reconnect the radio receiver assembly connector.

Fig 1: Identifying Radio Receiver Assembly Connector Terminals
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

Fig 2: Identifying Steering Pad Switch Assembly Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the z12 steering pad switch assembly connector.

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Switch Condition	Specified Condition
10 (AU1) - 8 (EAU)	No switch is pushed	100 kΩ or higher
	Seek+ switch: push	Below 1 Ω
	Seek-switch: push	312 to 345 Ω
	Volume+ switch: push	950 to 1050 Ω
	Volume- switch: push	2954 to 3265 Ω
9 (AU2) - 8 (EAU)	No switch is pushed	100 kΩ or higher
	MODE switch: push	Below 1 Ω
	On Hook switch: push	312 to 345 Ω
	Off Hook switch: push	950 to 1050 Ω

Reconnect the steering pad switch assembly connector.

NG: REPLACE STEERING PAD SWITCH ASSEMBLY (See REMOVAL )

OK: Go to next step

INSPECT SPIRAL CABLE

Disconnect the z12 steering pad switch assembly connector.
Disconnect the H54 spiral cable connector.

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
z12-8 (EAU) - H54-4 (EAU)	Spiral cable is turned 2.5 rotations counterclockwise	Below 1 Ω
	Spiral cable is centered
	Spiral cable is turned 2.5 rotations clockwise
z12-10 (AU1) - H54-6 (AU1)	Spiral cable is turned 2.5 rotations counterclockwise
	Spiral cable is centered
	Spiral cable is turned 2.5 rotations clockwise
z12-9 (AU2) - H54-5 (AU2)	Spiral cable is turned 2.5 rotations counterclockwise
	Spiral cable is centered
	Spiral cable is turned 2.5 rotations clockwise

Fig 3: Identifying Spiral Cable Connector Terminals

CAUTION: 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 PRECAUTION for the SRS (See PRECAUTION ).

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

NG: REPLACE SPIRAL CABLE (See REMOVAL )

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