Steering Pad Switch Circuit: Procedure

1. Disconnect the radio receiver assembly connector.
   Fig 1: Identifying Radio Receiver Assembly Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   J108-7 (SW1) - J108-6 (SWG)	No switch pushed	95 to 105 kΩ
   J108-7 (SW1) - J108-6 (SWG)	Seek+ switch pushed	Below 2.5 Ω
   J108-7 (SW1) - J108-6 (SWG)	Seek- switch pushed	312 to 345 Ω
   J108-7 (SW1) - J108-6 (SWG)	Volume+ switch pushed	950 to 1050 Ω
   J108-7 (SW1) - J108-6 (SWG)	Volume- switch pushed	2954 to 3265 Ω
   J108-8 (SW2) - J108-6 (SWG)	No switch pushed	95 to 105 kΩ
   J108-8 (SW2) - J108-6 (SWG)	MODE switch pushed	Below 2.5 Ω
   J108-8 (SW2) - J108-6 (SWG)	Voice switch pushed	2954 to 3265 Ω
   J108-8 (SW2) - J108-6 (SWG)	On hook switch pushed	312 to 345 Ω
   J108-8 (SW2) - J108-6 (SWG)	Off hook switch pushed	950 to 1050 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Radio Receiver Assembly)

NG → See step   2 

OK → See step   4 

1. Disconnect the steering pad switch assembly connector.
2. Measure the resistance according to the value(s) in the table below.
   Fig 2: Steering Pad Switch Assembly Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   k1-10 (AU1) - k1-8 (EAU)	No switch pushed	95 to 105 kΩ
   k1-10 (AU1) - k1-8 (EAU)	Seek+ switch pushed	Below 2.5 Ω
   k1-10 (AU1) - k1-8 (EAU)	Seek- switch pushed	312 to 345 Ω
   k1-10 (AU1) - k1-8 (EAU)	Volume+ switch pushed	950 to 1050 Ω
   k1-10 (AU1) - k1-8 (EAU)	Volume- switch pushed	2954 to 3265 Ω
   k1-9 (AU2) - k1-8 (EAU)	No switch pushed	95 to 105 kΩ
   k1-9 (AU2) - k1-8 (EAU)	MODE switch pushed	Below 2.5 Ω
   k1-9 (AU2) - k1-8 (EAU)	Voice switch pushed	2954 to 3265 Ω
   k1-9 (AU2) - k1-8 (EAU)	On hook switch pushed	312 to 345 Ω
   k1-9 (AU2) - k1-8 (EAU)	Off hook switch pushed	950 to 1050 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	Component without harness connected (Steering Pad Switch Assembly)	*2	Volume-
   *3	Volume+	*4	Seek-
   *5	Seek+	*6	MODE
   *7	Off hook	*8	On hook
   *9	Voice	-	-

NG → See step   6 

OK: Go to next step 

1. Disconnect the steering pad switch assembly and spiral cable sub-assembly connectors.
   Fig 3: Spiral Cable And Steering Pad Switch Terminal Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   k1-8 (EAU) - J24-4 (EAU)	Center	Below 1 Ω
   	2.5 rotations to the left
   	2.5 rotations to the right
   k1-10 (AU1) - J24-6 (AU1)	Center	Below 1 Ω
   	2.5 rotations to the left
   	2.5 rotations to the right
   k1-9 (AU2) - J24-5 (AU2)	Center	Below 1 Ω
   	2.5 rotations to the left
   	2.5 rotations to the right

   NOTE:

   The spiral cable sub-assembly is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable sub-assembly may prevent the airbag from deploying. Be sure to read the pages shown in the brackets.

   HINT: 

   • Removal. Refer to REMOVAL
   • Installation. Refer to INSTALLATION
   TEXT IN ILLUSTRATION
   
   

   *1	Steering Pad Switch Assembly Side
   *2	Vehicle Side

NG → See step   5 

OK → REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL CABLE - RADIO RECEIVER ASSEMBLY)