Steering Pad Switch Circuit: Procedure

1. Disconnect the radio receiver connector E70.
   Fig 1: Identifying Radio Receiver Connector E70

   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
   SW1 - SWG	No switch is pushed	Approx. 100 kΩ
   SW1 - SWG	SEEK+ switch: push	0 to 2.5 Ω
   SW1 - SWG	SEEK- switch: push	Approx. 0.3 kΩ
   SW1 - SWG	VOL+ switch: push	Approx. 1 kΩ
   SW1 - SWG	VOL- switch: push	Approx. 3.1 kΩ
   SW2 - SWG	No switch is pushed	Approx. 100 kΩ
   SW2 - SWG	MODE switch: push	0 to 2.5 Ω
   SW2 - SWG	ON HOOK switch: push	Approx. 0.3 kΩ
   SW2 - SWG	OFF HOOK switch: push	Approx. 1 kΩ

NG → See step   2 

OK → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

1. Disconnect the steering pad switch assembly connector d1.
   Fig 2: Identifying Steering Pad Switch Assembly Connector Dl

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the values in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   AU1 - EAU	No switch is pushed	Approx. 100 kΩ
   AU1 - EAU	SEEK+ switch: push	0 to 2.5 Ω
   AU1 - EAU	SEEK- switch: push	Approx. 0.3 kΩ
   AU1 - EAU	VOL+ switch: push	Approx. 1 kΩ
   AU1 - EAU	VOL- switch: push	Approx. 3.1 kΩ
   AU2 - EAU	No switch is pushed	Approx. 100 kΩ
   AU2 - EAU	MODE switch: push	0 to 2.5 Ω
   AU2 - EAU	ON HOOK switch: push	Approx. 0.3 kΩ
   AU2 - EAU	OFF HOOK switch: push	Approx. 1 kΩ

NG → REPLACE STEERING PAD SWITCH ASSEMBLY 

OK: Go to next step 

1. Disconnect the steering pad switch assembly and spiral cable connectors.
   Fig 3: Identifying Steering Pad Switch Assembly Connector Dl And E30 Terminals

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

   Standard resistance

   Tester Connection	Spiral Cable Position	Specified Condition
   EAU - EAU	Center	Below 1 Ω
   	2.5 rotations to the left
   	2.5 rotations to the right
   AU1 - AU1	Center	Below 1 Ω
   	2.5 rotations to the left
   	2.5 rotations to the right
   AU2 - 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 page shown in the brackets.

   HINT: 

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

NG → REPLACE SPIRAL CABLE 

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