Steering Pad Switch Circuit: Procedure

1. Disconnect the radio receiver connector.
   Fig 1: Identifying E32 Radio Receiver 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
   E32-7 (SW1) - E32-6 (SWG)	No switch is pushed	95 to 105 kΩ
   E32-7 (SW1) - E32-6 (SWG)	Seek+ switch: pushed	Below 2.5 Ω
   E32-7 (SW1) - E32-6 (SWG)	Seek- switch: pushed	313.5 to 346.5 Ω
   E32-7 (SW1) - E32-6 (SWG)	Volume+ switch: pushed	959.5 to 1060.5 Ω
   E32-7 (SW1) - E32-6 (SWG)	Volume- switch: pushed	3049.5 to 3370.5 Ω
   E32-8 (SW2) - E32-6 (SWG)	No switch is pushed	95 to 105 kΩ
   E32-8 (SW2) - E32-6 (SWG)	MODE switch: pushed	Below 2.5 Ω
   E32-8 (SW2) - E32-6 (SWG)	Voice switch: pushed*1	3049.5 to 3370.5 Ω
   E32-8 (SW2) - E32-6 (SWG)	On Hook switch: pushed*1	313.5 to 346.5 Ω
   E32-8 (SW2) - E32-6 (SWG)	Off Hook switch: pushed*1	959.5 to 1060.5 Ω

   • *1: for 7 Speakers

NG → See step   3 

OK → See step   2 

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   Y1-10 (AU1) - Y1-8 (EAU)	No switch is pushed	95 to 105 kΩ
   Y1-10 (AU1) - Y1-8 (EAU)	Seek+ switch: pushed	Below 2.5 Ω
   Y1-10 (AU1) - Y1-8 (EAU)	Seek- switch: pushed	313.5 to 346.5 Ω
   Y1-10 (AU1) - Y1-8 (EAU)	Volume+ switch: pushed	959.5 to 1060.5 Ω
   Y1-10 (AU1) - Y1-8 (EAU)	Volume- switch: pushed	3049.5 to 3370.5 Ω
   Y1-9 (AU2) - Y1-8 (EAU)	No switch is pushed	95 to 105 kΩ
   Y1-9 (AU2) - Y1-8 (EAU)	MODE switch: pushed	Below 2.5 Ω
   Y1-9 (AU2) - Y1-8 (EAU)	Voice switch: pushed*1	3049.5 to 3370.5 Ω
   Y1-9 (AU2) - Y1-8 (EAU)	ON HOOK switch: pushed*1	313.5 to 346.5 Ω
   Y1-9 (AU2) - Y1-8 (EAU)	OFF HOOK switch: pushed*1	959.5 to 1060.5 Ω

   • *1: for 7 Speakers

NG → See step   6 

OK: Go to next step 

1. Disconnect the steering pad switch and spiral cable connectors.
   Fig 3: Identifying Steering Pad Switch & Spiral Cable 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
   Y1-8 (EAU) - E10-4 (EAU)	Center	Below 1 Ω
   	2.5 rotations to the left
   	2.5 rotations to the right
   Y1-10 (AU1) - E10-6 (AU1)	Center	Below 1 Ω
   	2.5 rotations to the left
   	2.5 rotations to the right
   Y1-9 (AU2) - E10-5 (AU2)	Center	Below 1 Ω
   	2.5 rotations to the left
   	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 service information shown in the brackets.

   HINT: 

   • Removal. Refer to REMOVAL
   • Installation. Refer to INSTALLATION

NG → See step   5 

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