Steering Pad Switch Circuit: Procedure

1. Disconnect the L59 display and navigation module display connector.
2. Disconnect the L134 spiral cable sub-assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   L59-24 (SW2) - L134-13 (AU2)	Always	Below 1 Ω
   L59-23 (SWG) - L134-11 (EAU)	Always	Below 1 Ω
   L59-25 (SW1) - L134-6 (AU1)	Always	Below 1 Ω
   L59-24 (SW2) - Body ground	Always	10 kΩ or higher
   L59-23 (SWG) - Body ground	Always	10 kΩ or higher
   L59-25 (SW1) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Remove the spiral cable sub-assembly. Refer to REMOVAL .
   Fig 1: Identifying Spiral Cable Sub-Assembly Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   TEXT IN ILLUSTRATION
   
   

   *1

   Steering Pad Switch Side

   *2

   Vehicle Side

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

   Standard Resistance

   Tester Connection	Spiral Cable Position	Specified Condition
   11 (EAU) - 3 (EAU)	2.5 rotations to the left	Below 3 Ω
   	Center
   	2.5 rotations to the right
   13 (AU2) - 5 (AU2)	2.5 rotations to the left	Below 3 Ω
   	Center
   	2.5 rotations to the right
   6 (AU1) - 11 (AU1)	2.5 rotations to the left	Below 3 Ω
   	Center
   	2.5 rotations to the right

   NOTE:

   The spiral cable is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable may prevent the airbag from deploying. Be sure to read the Precaution for the supplemental restraint system. Refer to PRECAUTION .

NG → See step   6 

OK: Go to next step 

1. Remove the steering pad switch assembly. Refer to REMOVAL .
   Fig 2: Inspecting Steering Pad Switch 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	Switch Condition	Specified Condition
   11 (AU1) - 3 (EAU)	No switch is pushed	100 kΩ
   11 (AU1) - 3 (EAU)	Seek+ switch pushed	Below 1 Ω
   11 (AU1) - 3 (EAU)	Seek- switch pushed	329 Ω
   11 (AU1) - 3 (EAU)	Volume+ switch pushed	1000 Ω
   11 (AU1) - 3 (EAU)	Volume- switch pushed	3110 Ω
   5 (AU2) - 3 (EAU)	No switch is pushed	100 kΩ
   5 (AU2) - 3 (EAU)	MODE switch pushed	Below 1 Ω
   5 (AU2) - 3 (EAU)	ON hook switch pushed	329 Ω
   5 (AU2) - 3 (EAU)	OFF hook switch pushed	1000 Ω
   5 (AU2) - 3 (EAU)	Voice switch pushed	3110 Ω

NG → See step   4 

OK → See step   7 

1. Remove the steering pad switch assembly (steering wheel side). Refer to REMOVAL .
   Fig 3: Inspecting Steering Pad Switch Assembly (Steering Pad Side)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   TEXT IN ILLUSTRATION
   
   

   *1	Seek+ Switch	*2	Seek-Switch
   *3	MODE Switch	*4	Off Hook Switch
   *5	On Hook Switch	-	-

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

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   7 (AU2-1) - 3 (EAU-1)	No switch is pushed	1000 kΩ or higher
   7 (AU2-1) - 3 (EAU-1)	MODE switch pushed	Below 1 Ω
   7 (AU2-1) - 10 (AU2-3)	No switch is pushed	1010 Ω
   7 (AU2-1) - 3 (EAU-1)	ON hook switch pushed	330 Ω
   7 (AU2-1) - 3 (EAU-1)	OFF hook switch pushed	1010 Ω
   6 (AU1-1) - 3 (EAU-1)	No switch is pushed	1000 kΩ or higher
   6 (AU1-1) - 3 (EAU-1)	Seek+ switch pushed	Below 2.5 Ω
   6 (AU1-1) - 3 (EAU-1)	Seek- switch pushed	329 Ω
   6 (AU1-1) - 9 (AU1-2)	No switch is pushed	330 Ω

NG → See step   8 

OK → See step   5