Inspection Procedure

1. Remove the steering pad switch assembly (See REMOVAL ).
   Fig 1: Inspecting Steering Pad Switch Assembly

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

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Switch Condition	Specified Condition
   b1-2 (DIST) - b1-4 (ECC)	Distance control switch is ON	Below 1 Ω
   	Distance control switch is OFF	10 kΩ or higher

   HINT:

   When a malfunction is detected in the distance control switch, replace the steering pad switch assembly.

NG: REPLACE STEERING PAD SWITCH ASSEMBLY  (See REMOVAL )

OK: Go to next step. 

HINT:

• Removal (See REMOVAL )
• Installation (See INSTALLATION )

1. Remove the spiral cable.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Condition	Spiral Cable Position	Specified Condition
   b1-2 (DIST) - C13-2 (DIST)	Center	Below 1 Ω
   	2.5 rotations to the left
   	2.5 rotations to the right
   b1-4 (ECC) - C13-4 (ECC)	Center	Below 1 Ω
   	2.5 rotations to the left
   	2.5 rotations to the right

   HINT:

   The spiral cable makes a maximum of approximately 5 rotations.

Fig 2: Identifying Spiral Cable Connector Terminal
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE SPIRAL CABLE  (See REMOVAL )

OK: Go to next step. 

1. Disconnect the D2 distance control ECU connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   C13-2 (DIST) - D2-16 (MODE)	Always	Below 1 Ω
   D2-16 (MODE) - Body ground	Always	10 kΩ or higher

Fig 3: Identifying D2 Distance Control And Spiral Cable C13 ECU Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step. 

1. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   C13-4 (ECC) - Body ground	Always	Below 1 Ω

Fig 4: Identifying C13 Spiral Cable Connector Terminal
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step. 

1. Remove the distance control ECU with the connector.
2. Turn the ignition switch to the ON position.
3. Measure the voltage according to the value(s) in the table below.

   Standard voltage 

   VOLTAGE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   D2-16 (MODE) - Body ground	Distance control switch ON	0 to 2 V
   D2-16 (MODE) - Body ground	Distance control switch OFF	10 to 14 V

   Fig 5: Identifying Distance Control ECU Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE DISTANCE CONTROL ECU  (See REMOVAL  )

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE  (See PROBLEM SYMPTOMS TABLE  )