Steering Pad Switch Circuit: Procedure

1. Disconnect the F30 display and navigation module display connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   F30-25 (SW1) - F30-23 (SWG)	No switch pushed	95 to 105 kΩ
   F30-25 (SW1) - F30-23 (SWG)	Seek+ switch pushed	Below 2.5 Ω
   F30-25 (SW1) - F30-23 (SWG)	Seek- switch pushed	323 to 335 Ω
   F30-25 (SW1) - F30-23 (SWG)	Volume+ switch pushed	980 to 1020 Ω
   F30-25 (SW1) - F30-23 (SWG)	Volume- switch pushed	3048 to 3172 Ω
   F30-24 (SW2) - F30-23 (SWG)	No switch pushed	95 to 105 kΩ
   F30-24 (SW2) - F30-23 (SWG)	MODE switch pushed	Below 2.5 Ω
   F30-24 (SW2) - F30-23 (SWG)	Voice switch pushed	3048 to 3172 Ω
   F30-24 (SW2) - F30-23 (SWG)	On Hook switch pushed	323 to 335 Ω
   F30-24 (SW2) - F30-23 (SWG)	Off Hook switch pushed	980 to 1020 Ω

NG → See step   2 

OK → See step   5 

1. Disconnect the F30 display and navigation module display connector.
2. Disconnect the F19 spiral with sensor cable sub-assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F30-25 (SW1) - F19-6 (AU1)	Always	Below 1 Ω
   F30-24 (SW2) - F19-5 (AU2)	Always	Below 1 Ω
   F30-23 (SWG) - F19-4 (EAU)	Always	Below 1 Ω
   F30-25 (SW1) - Body ground	Always	10 kΩ or higher
   F30-24 (SW2) - Body ground	Always	10 kΩ or higher
   F30-23 (SWG) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the steering pad switch assembly and spiral with sensor cable sub-assembly connectors.
   Fig 1: Inspecting Spiral With Sensor Cable Sub-Assembly

   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. Refer to the appropriate information shown in the brackets.

   HINT: 

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

   *1	Component without harness connected (Spiral with Sensor Cable Sub-assembly)
   *2	Steering Pad Switch Side
   *3	Vehicle Side

NG → See step   7 

OK: Go to next step 

1. Disconnect the z33 steering pad switch assembly connector.
   Fig 2: Identifying z33 Steering Pad Switch Connector & Assembly

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

   Standard Resistance

   Tester Connection	Switch 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	323 to 335 Ω
   z33-10 (AU1) - z33-8 (EAU)	Volume+ switch pushed	980 to 1020 Ω
   z33-10 (AU1) - z33-8 (EAU)	Volume- switch pushed	3048 to 3172 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	3048 to 3172 Ω
   z33-9 (AU2) - z33-8 (EAU)	On Hook switch pushed	323 to 335 Ω
   z33-9 (AU2) - z33-8 (EAU)	Off Hook switch pushed	980 to 1020 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 Switch	-	-

NG → See step   8 

OK → See step   6