Steering Pad Switch Circuit: Procedure

1. Remove the air conditioning control assembly. Refer to REMOVAL with the connectors still connected.
   Fig 1: Identifying 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	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	Approx. 329 Ω
   E10-4 (ADI1) - E10-9 (SG)	TEMP+ switch: ON	Approx. 1000 Ω
   E10-4 (ADI1) - E10-9 (SG)	TEMP- switch: ON	Approx. 3110 Ω

NG → See step   2 

OK → See step   5 

1. Remove the steering pad switch assembly.
2. Disconnect the connector from the steering pad switch assembly.
   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)	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. 329 Ω
   z2-3 (AC1) - z2-2 (EAC)	TEMP+ switch: ON	Approx. 1000 Ω
   z2-3 (AC1) - z2-2 (EAC)	TEMP- switch: ON	Approx. 3110 Ω

NG → See step   6 

OK: Go to next step 

1. Disconnect the connector from the spiral cable sub-assembly.
   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 information shown in the brackets below.

   HINT: 

   The spiral cable makes a maximum of approximately 5 rotations.

NG → See step   7 

OK: Go to next step 

1. Disconnect the connector from the air conditioning control assembly.
   Fig 4: Checking Harness And Connector (A/C Control Assembly - Spiral Cable Sub-Assembly)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the connector from the spiral cable sub-assembly.
3. Measure the resistance according to the value(s) in the table below.

   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
   E10-4 (ADI1) - D16-10 (AC1)	Always	10 kΩ or higher
   E10-9 (SG) - D16-9 (EAC)	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   8