Toyota Tundra Service Manual: Inspection

Toyota Tundra Service Manual / Audio, Visual, Telematics / Audio / Video / Steering Pad Switch / Inspection

INSPECTION

PROCEDURE

1. INSPECT STEERING PAD SWITCH ASSEMBLY

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

*A	w/ Lane Departure Alert System	-	-
*1	VOLUME+	*2	VOLUME-
*3	SEEK+	*4	SEEK-
*5	VOICE	*6	MODE HOLD
*7	OFF HOOK	*8	ON HOOK
*9	UP	*10	DOWN
*11	RIGHT	*12	LEFT
*13	ENTER	*14	BACK
*15	TOP	*16	ACC
*17	LDA	-	-
*a	Component without harness connected	-	-

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
*:w/ Lane Departure Alert System
A2 (+DP) - A7 (EAU)	No switch is pushed	100 kΩ or higher
	ENTER switch is pushed	Below 2.5 Ω
	TOP switch is pushed	312 to 345 Ω
	BACK switch is pushed	950 to 1050 Ω
A3 (+DP2) - A7 (EAU)	No switch is pushed	100 kΩ or higher
	RIGHT switch is pushed	2954 to 3265 Ω
	LEFT switch is pushed	Below 2.5 Ω
	UP switch is pushed	312 to 345 Ω
	DOWN switch is pushed	950 to 1050 Ω
A9 (AU2) - A7 (EAU)	No switch is pushed	100 kΩ or higher
	MODE switch is pushed	Below 2.5 Ω
	ON HOOK switch is pushed	312 to 345 Ω
	OFF HOOK switch is pushed	950 to 1050 Ω
	VOICE switch is pushed	2954 to 3265 Ω
A10 (AU1) - A7 (EAU)	No switch is pushed	100 kΩ or higher
	SEEK+ switch is pushed	Below 2.5 Ω
	SEEK- switch is pushed	312 to 345 Ω
	VOLUME+ switch is pushed	950 to 1050 Ω
	VOLUME- switch is pushed	2954 to 3265 Ω
A4 (DIST) - A6 (ECC)*	No switch is pushed	100 kΩ or higher
	ACC switch is pushed	Below 2.5 Ω
	LDA switch is pushed	228 to 252 Ω
B (HO) - A1 (HO)	Always	Below 2.5 Ω

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

(b) Check the illumination.

(1) Connect the battery positive (+) lead to terminal A5 (IL+2) and the negative (-) lead to terminal A8 (IL-2) of the steering pad switch assembly connector.

(2) Check that the switch illumination comes on.

OK:

Steering pad switch illumination comes on.

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

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Toyota Tundra Service Manual: Inspection

Components

Installation

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