Inspection Procedure

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

INSPECT NAVIGATION RECEIVER ASSEMBLY

Disconnect the navigation receiver assembly connector R13.

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

Standard resistance

TESTER CONNECTION AND SPECIFIED CONDITION

Tester connection	Condition	Specified condition
SW1 - SWG	No switch is pushed	Approx. 100 kΩ
SW1 - SWG	SEEK+ switch: push	Approx. 0 Ω
SW1 - SWG	SEEK- switch: push	Approx. 0.3 kΩ
SW1 - SWG	VOL+ switch: push	Approx. 1 kΩ
SW1 - SWG	VOL- switch: push	Approx. 3.2 kΩ
SW2 - SWG	No switch is pushed	Approx. 100 kΩ
SW2 - SWG	MODE switch: push	Approx. 0 Ω
SW2 - SWG	VOICE switch: push	Approx. 3.2 kΩ
SW2 - SWG	ON HOOK switch: push	Approx. 0.3 kΩ
SW2 - SWG	OFF HOOK switch: push	Approx. 1 kΩ

Fig 1: Identifying Navigation Receiver Assembly Connector R13

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to step 2

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

INSPECT STEERING PAD SWITCH ASSEMBLY

Disconnect the steering pad switch assembly connector A.

Fig 2: Inspecting Steering Pad Switch Assembly
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard resistance

TESTER CONNECTION AND SPECIFIED CONDITION

Tester connection	Condition	Specified condition
AU1 - EAU	No switch is pushed	Approx. 100 kΩ
AU1 - EAU	SEEK+ switch: push	Approx. 0 Ω
AU1 - EAU	SEEK- switch: push	Approx. 0.3 kΩ
AU1 - EAU	VOL+ switch: push	Approx. 1 kΩ
AU1 - EAU	VOL- switch: push	Approx. 3.2 kΩ
AU2 - EAU	No switch is pushed	Approx. 100 kΩ
AU2 - EAU	MODE switch: push	Approx. 0 Ω
AU2 - EAU	VOICE switch: push	Approx. 3.2 kΩ
AU2 - EAU	ON HOOK switch: push	Approx. 0.3 kΩ
AU2 - EAU	OFF HOOK switch: push	Approx. 1 kΩ

NG: Go to step 4

OK: Go to next step.

INSPECT SPIRAL CABLE SUB-ASSEMBLY

Disconnect the steering pad switch assembly and spiral cable sub-assembly connectors.

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

Standard resistance

TESTER CONNECTION AND SPECIFIED CONDITION

Tester connection	Spiral Cable Position	Specified condition
EAU - EAU	Center	Below 1 Ω
	2.5 rotations to the left
	2.5 rotations to the right
AU1 - AU1	Center	Below 1 Ω
	2.5 rotations to the left
	2.5 rotations to the right
AU2 - 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 information shown in the brackets (See INSPECTION ).

Fig 3: Identifying Spiral Cable (AU2) Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE SPIRAL CABLE SUB-ASSEMBLY

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

INSPECT STEERING PAD SWITCH CABLE

Disconnect the steering pad switch LH and the steering pad switch RH.

Fig 4: Inspecting Steering Pad Switch Cable
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard resistance

TESTER CONNECTION AND SPECIFIED CONDITION

Tester connection	Condition	Specified condition
B-1 - C-1	Always	Below 1 Ω
B-2 - C-2	Always	Below 1 Ω
B-3 - C-3	Always	Below 1 Ω
B-4 - C-4	Always	Below 1 Ω
B-5 - C-5	Always	Below 1 Ω
B-6 - C-6	Always	Below 1 Ω
B-7 - C-7	Always	Below 1 Ω
B-8 - C-8	Always	Below 1 Ω
B-1 - Body ground	Always	10 kΩ or higher
B-2 - Body ground	Always	10 kΩ or higher
B-3 - Body ground	Always	10 kΩ or higher
B-4 - Body ground	Always	10 kΩ or higher
B-5 - Body ground	Always	10 kΩ or higher
B-6 - Body ground	Always	10 kΩ or higher
B-7 - Body ground	Always	10 kΩ or higher
B-8 - Body ground	Always	10 kΩ or higher

NG: REPLACE STEERING PAD SWITCH CABLE

OK: Go to next step.

INSPECT STEERING PAD SWITCH RH

Reconnect the steering pad switch RH.

Fig 5: Inspecting Steering Pad Switch RH
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard resistance

TESTER CONNECTION AND SPECIFIED CONDITION

Tester connection	Condition	Specified condition
AU2 (B-4) - EAU (B-2)	No switch is pushed	10 kΩ or higher
AU2 (B-5) - EAU (B-3)
AU2 (B-5) -EAU (B-2)
AU2 (B-4) - EAU (B-3)
AU2 (B-4) - EAU (B-2)	VOICE switch: push	Approx. 3.2 kΩ
AU2 (B-5) - EAU (B-3)
AU2 (B-5) - EAU (B-2)
AU2 (B-4) - EAU (B-3)
AU2 (B-4) - EAU (B-2)	ON HOOK switch: push	Approx. 0.3 kΩ
AU2 (B-5) - EAU (B-3)
AU2 (B-5) - EAU (B-2)
AU2 (B-4) - EAU (B-3)
AU2 (B-4) - EAU (B-2)	OFF HOOK switch: push	Approx. 1 kΩ
AU2 (B-5) - EAU (B-3)
AU2 (B-5) - EAU (B-2)
AU2 (B-4) - EAU (B-3)

NG: REPLACE STEERING PAD SWITCH RH

OK: REPLACE STEERING PAD SWITCH LH