Steering Pad Switch Circuit: Procedure

1. Disconnect the navigation receiver assembly connector.
   Fig 1: Identifying E32 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
   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)	VOL+ switch: pushed	959.5 to 1060.5 Ω
   E32-7 (SW1) - E32-6 (SWG)	VOL- 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

NG → See step   3 

OK → See step   2 

1. Disconnect the steering pad switch assembly and spiral cable connectors.
   Fig 2: Identifying Y1 Steering Pad Switch Assembly And E10 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 information shown in the brackets.

   HINT: 

   • Refer to REMOVAL
   • Refer to INSTALLATION

NG → See step   5 

OK: Go to next step 

1. Disconnect the steering pad switch assembly connector.
   Fig 3: Identifying Steering Pad Switch Assembly Connector Terminal

   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
   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)	VOL+ switch: pushed	959.5 to 1060.5 Ω
   Y1-10 (AU1) - Y1-8 (EAU)	VOL- 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

NG → See step   6 

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