Steering Pad Switch: Inspection

WARNING: This page is about a different car, the 2007 Lexus GX 470. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT STEERING PAD SWITCH LH

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

Fig 1: Identifying Steering Pad Switch LH
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance

STEERING PAD SWITCH LH

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. 3.1 kΩ
AU2 - EAU	No switch is pushed	Approx. 100 kΩ
AU2 - EAU	MODE switch: push	Approx. 0 Ω

If the result is not as specified, replace the steering pad switch LH.

INSPECT STEERING PAD SWITCH CABLE SUB-ASSEMBLY (w/ Navigation System)

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

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

Fig 2: Identifying Steering Pad Switch Cable Sub-Assembly (With Navigation System)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance

STEERING PAD SWITCH CABLE SUB-ASSEMBLY (W/ NAVIGATION SYSTEM)

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

If the result is not as specified, replace the steering pad switch cable sub-assembly.

INSPECT STEERING PAD SWITCH RH (w/ Navigation System)

Steering pad switch RH
Measure the resistance according to the values in the table below.

Fig 3: Identifying Steering Pad Switch RH (With Navigation System)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance

STEERING PAD SWITCH RH (W/ NAVIGATION SYSTEM)

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. 0.33 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. 1.0 kΩ
AU2 (B-5) - EAU (B-3)
AU2 (B-5) - EAU (B-2)
AU2 (B-4) - EAU (B-3)

If the result is not as specified, replace the steering pad switch RH.