Steering Pad Switch Circuit: Procedure

1. Disconnect the L41 navigation receiver assembly connector.
   Fig 1: Identifying L41 Navigation 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	Switch Condition	Specified Condition
   L41-7 (SW1) - L41-6 (SWG)	No switch pushed	95 to 105 kΩ
   L41-7 (SW1) - L41-6 (SWG)	Seek+ switch pushed	Below 2.5 Ω
   L41-7 (SW1) - L41-6 (SWG)	Seek- switch pushed	323 to 335 Ω
   L41-7 (SW1) - L41-6 (SWG)	Volume+ switch pushed	980 to 1020 Ω
   L41-7 (SW1) - L41-6 (SWG)	Volume- switch pushed	3048 to 3172 Ω
   L41-8 (SW2) - L41-6 (SWG)	No switch pushed	95 to 105 kΩ
   L41-8 (SW2) - L41-6 (SWG)	MODE switch pushed	Below 2.5 Ω
   L41-8 (SW2) - L41-6 (SWG)	Voice switch pushed	3048 to 3172 Ω
   L41-8 (SW2) - L41-6 (SWG)	On Hook switch pushed	323 to 335 Ω
   L41-8 (SW2) - L41-6 (SWG)	Off Hook switch pushed	980 to 1020 Ω

   TEXT IN ILLUSTRATION
   
   

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

NG → See step   3 

OK → See step   2 

1. Disconnect the steering pad switch assembly and spiral with sensor cable sub-assembly connectors.
   Fig 2: Identifying Steering Pad Switch Assembly And 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
   z9-8 (EAU) - L52-4 (EAU)	Center	Below 1 Ω
   	2.5 rotations to the left
   	2.5 rotations to the right
   z9-10 (AU1) - L52-6 (AU1)	Center	Below 1 Ω
   	2.5 rotations to the left
   	2.5 rotations to the right
   z9-9 (AU2) - L52-5 (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 service 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 Assembly Side
   *3	Vehicle Side

NG → See step   5 

OK: Go to next step 

1. Disconnect the z9 steering pad switch assembly connector.
   Fig 3: Identifying z9 Steering Pad Switch 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	Switch Condition	Specified Condition
   z9-10 (AU1) - z9-8 (EAU)	No switch pushed	95 to 105 kΩ
   z9-10 (AU1) - z9-8 (EAU)	Seek+ switch pushed	Below 2.5 Ω
   z9-10 (AU1) - z9-8 (EAU)	Seek- switch pushed	323 to 335 Ω
   z9-10 (AU1) - z9-8 (EAU)	Volume+ switch pushed	980 to 1020 Ω
   z9-10 (AU1) - z9-8 (EAU)	Volume- switch pushed	3048 to 3172 Ω
   z9-9 (AU2) - z9-8 (EAU)	No switch pushed	95 to 105 kΩ
   z9-9 (AU2) - z9-8 (EAU)	MODE switch pushed	Below 2.5 Ω
   z9-9 (AU2) - z9-8 (EAU)	Voice switch pushed	3048 to 3172 Ω
   z9-9 (AU2) - z9-8 (EAU)	On Hook switch pushed	323 to 335 Ω
   z9-9 (AU2) - z9-8 (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	Voice Switch
   *7	Off Hook	*8	Seek+
   *9	On Hook	-	-

NG → REPLACE STEERING PAD SWITCH ASSEMBLY 

OK → REPAIR OR REPLACE HARNESS OR CONNECTOR (NAVIGATION RECEIVER - SPIRAL WITH SENSOR CABLE)