Steering Pad Switch Circuit: Procedure

1. Disconnect the E10 control connector.
   Fig 1: Checking Harness And Connector (Air Conditioning Control Assembly)

   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
   E10-4 (ADI1) - E10-9 (SG)	AUTO switch ON	Below 2.5 Ω
   E10-4 (ADI1) - E10-9 (SG)	OFF switch ON	313 to 345 Ω
   E10-4 (ADI1) - E10-9 (SG)	TEMP + switch ON	950 to 1050 Ω
   E10-4 (ADI1) - E10-9 (SG)	TEMP - switch ON	2954 to 3266 Ω

NG → See step   2 

OK → See step   5 

1. Remove the steering pad switch assembly. Refer to REMOVAL .
2. Disconnect the z2 steering pad switch connector.
   Fig 2: Identifying Steering Pad Switch Assembly

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

   Standard resistance

   Tester Connection (Symbols)	Switch Condition	Specified Condition
   z2-3 (AC1) - z2-2 (EAC)	AUTO switch ON	Below 2.5 Ω
   z2-3 (AC1) - z2-2 (EAC)	OFF switch ON	Approx. 313 to 345 Ω
   z2-3 (AC1) - z2-2 (EAC)	TEMP + switch ON	Approx. 950 to 1050 Ω
   z2-3 (AC1) - z2-2 (EAC)	TEMP - switch ON	Approx. 2954 to 3266 Ω

NG → See step   6 

OK: Go to next step 

1. Remove the spiral cable connectors. Refer to REMOVAL .
   Fig 3: Identifying Spiral Cable Sub-Assembly

   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
   D16-10 (AC1) - z2-3 (AC1)	Center	Below 1 Ω
   D16-10 (AC1) - z2-3 (AC1)	2.5 rotations to the left	Below 1 Ω
   D16-10 (AC1) - z2-3 (AC1)	2.5 rotations to the right	Below 1 Ω
   D16-9 (EAC) - z2-2 (EAC)	Center	Below 1 Ω
   D16-9 (EAC) - z2-2 (EAC)	2.5 rotations to the left	Below 1 Ω
   D16-9 (EAC) - z2-2 (EAC)	2.5 rotations to the right	Below 1 Ω

   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 cautions and notice when replacing the spiral cable.

   HINT: 

   The spiral cable makes a maximum of approximately 5 rotations.

NG → See step   7 

OK: Go to next step 

1. Measure the resistance according to the value(s) in the table below.
   Fig 4: Checking Harness And Connector (Air Conditioning Control Assembly - Spiral Cable Sub-Assembly)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard resistance

   Tester Connection	Condition	Specified Condition
   E10-4 (ADI1) - D16-10 (AC1)	Always	Below 1 Ω
   E10-9 (SG) - D16-9 (EAC)	Always	Below 1 Ω
   E10-9 (SG) - Body ground	Always	10 kΩ or higher
   E10-4 (ADI1) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   8