Inspection [09/2014 - 11/2017]: Procedure

INSPECT STEERING PAD SWITCH ASSEMBLY

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*A	w/ Dynamic Radar Cruise Control System	*B	w/ Lane Departure Alert System
*a	Component without harness connected (Steering Pad Switch Assembly)	*b	Seek+
*c	Seek-	*d	Volume+
*e	Volume-	*f	MODE
*g	Off hook	*h	On hook
*i	Voice	*j	Up
*k	Down	*l	Left
*m	Right	*n	Enter
*o	Back	*p	Distance Control
*q	Top	*r	Lane Departure Alert Main

Standard Resistance

Tester Connection	Condition	Specified Condition
z4-11 (AU1) - z4-8 (EAU)	No switch pushed	95 to 105 kΩ
	SEEK+ switch pushed	Below 2.5 Ω
	SEEK- switch pushed	313 to 345 Ω
	Volume+ switch pushed	950 to 1050 Ω
	Volume- switch pushed	2955 to 3265 Ω
z4-10 (AU2) - z4-8 (EAU)	No switch pushed	95 to 105 kΩ
	MODE switch pushed	Below 2.5 Ω
	On hook switch pushed	313 to 345 Ω
	Off hook switch pushed	950 to 1050 Ω
	Voice switch pushed	2955 to 3265 Ω
z4-3 (+DP2) - z4-8 (EAU)	No switch pushed	95 to 105 kΩ
	Left switch pushed	Below 2.5 Ω
	Up switch pushed	313 to 345 Ω
	Down switch pushed	950 to 1050 Ω
	Right switch pushed	2955 to 3265 Ω
z4-2 (+DP) - z4-8 (EAU)	No switch pushed	95 to 105 kΩ
	Enter switch pushed	Below 2.5 Ω
	Top switch pushed	313 to 345 Ω
	Back switch pushed	950 to 1050 Ω
z4-4 (DIST) - z4-7 (ECC)	No switch pushed	1 MΩ or higher
	Distance control switch pushed*1	Below 2.5 Ω
	Lane departure alert main switch pushed*2	228 to 252 Ω
z4-1 (HO) - A-1(HO)	Always	Below 2.5 Ω
z4-6 (SUP) - z6-1 (SUP)	Always	Below 2.5 Ω
z4-7 (ECC) - z6-3 (ECC)	Always	Below 2.5 Ω
z4-12 (SDN) - z6-2 (SDN)	Always	Below 2.5 Ω

HINT:

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

Check the illumination.

Component without harness connected
(Steering Pad Switch Assembly)

Connect a battery positive (+) lead to terminal 5 (IL+2) and a negative (-) lead to terminal 8 (EAU) of the steering pad switch assembly connector.
Check that the switch illumination comes on.
OK

Steering pad switch illumination comes on.

HINT:

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