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.

See More:

Toyota Tundra Service Manual > Airbag System: System Diagram
SYSTEM DIAGRAM Communication Table Transmitting ECU (Transmitter) Receiving ECU (Receiver) Signal Communication Method Airbag Sensor Assembly ECM Crash detection signal CAN Brake Actuator Assembly (Skid Control ECU) Combination Meter Assembly SRS warning light on demand signal SRS warning light blin ...

Toyota Tundra Service Manual: Inspection

Components

Installation

See More:

Toyota Tundra Owners Manual

Toyota Tundra Service Manual