Steering Pad Switch Circuit: Procedure

1. Disconnect the radio receiver assembly connector.
   Fig 1: Identifying F67 Radio Receiver Assembly Connector

   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
   F67-7 (SW1) - F67-6 (SWG)	No switch pushed	95 to 105 kΩ
   F67-7 (SW1) - F67-6 (SWG)	Seek+ switch pushed	Below 2.5 Ω
   F67-7 (SW1) - F67-6 (SWG)	Seek- switch pushed	323 to 335 Ω
   F67-7 (SW1) - F67-6 (SWG)	Volume+ switch pushed	980 to 1020 Ω
   F67-7 (SW1) - F67-6 (SWG)	Volume- switch pushed	3048 to 3172 Ω
   F67-8 (SW2) - F67-6 (SWG)	No switch pushed	95 to 105 kΩ
   F67-8 (SW2) - F67-6 (SWG)	MODE switch pushed	Below 2.5 Ω
   F67-8 (SW2) - F67-6 (SWG)	Voice switch pushed	3048 to 3172 Ω
   F67-8 (SW2) - F67-6 (SWG)	On hook switch pushed	323 to 335 Ω
   F67-8 (SW2) - F67-6 (SWG)	Off hook switch pushed	980 to 1020 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: Identifying z33 Steering Pad Switch Assembly Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   z33-10 (AU1) - z33-8 (EAU)	No switch pushed	95 to 105 kΩ
   z33-10 (AU1) - z33-8 (EAU)	Seek+ switch pushed	Below 2.5 Ω
   z33-10 (AU1) - z33-8 (EAU)	Seek- switch pushed	312 to 345 Ω
   z33-10 (AU1) - z33-8 (EAU)	Volume+ switch pushed	950 to 1050 Ω
   z33-10 (AU1) - z33-8 (EAU)	Volume- switch pushed	2954 to 3265 Ω
   z33-9 (AU2) - z33-8 (EAU)	No switch pushed	95 to 105 kΩ
   z33-9 (AU2) - z33-8 (EAU)	MODE switch pushed	Below 2.5 Ω
   z33-9 (AU2) - z33-8 (EAU)	Voice switch pushed	2954 to 3265 Ω
   z33-9 (AU2) - z33-8 (EAU)	On hook switch pushed	312 to 345 Ω
   z33-9 (AU2) - z33-8 (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	MODE
   *5	Seek-	*6	Seek+
   *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 with sensor cable sub-assembly connectors.
   Fig 3: Identifying z33 Steering Pad Switch Assembly & F19 Spiral With Sensor Cable Sub-Assembly 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
   z33-8 (EAU) - F19-4 (EAU)	Center	Below 1 Ω
   	2.5 rotations to the left
   	2.5 rotations to the right
   z33-10 (AU1) - F19-6 (AU1)	Center	Below 1 Ω
   	2.5 rotations to the left
   	2.5 rotations to the right
   z33-9 (AU2) - F19-5 (AU2)	Center	Below 1 Ω
   	2.5 rotations to the left
   	2.5 rotations to the right

   NOTE:

   The spiral with sensor cable sub-assembly is an important part of the SRS airbag system. Incorrect removal or installation of the spiral with sensor cable sub-assembly may prevent the airbag from deploying. Be sure to read the appropriate information 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)