Distance Control Switch Circuit [12/2015 - 11/2017]: Procedure

1. Remove the steering pad switch assembly (Refer to REMOVAL [12/2015 - ] ).
2. Inspect the steering pad switch assembly (Refer to INSPECTION [12/2015 - 11/2017] ).

Result: 

NG 

REPLACE STEERING PAD SWITCH ASSEMBLY 

(Refer to REMOVAL [12/2015 - ] )

Result: 

OK 

See step  2

1. Remove the spiral cable sub-assembly (Refer to REMOVAL [12/2015 - ] ).
2. Inspect the spiral cable sub-assembly (Refer to INSPECTION [12/2015 - ] ).

   HINT: 

   The spiral cable makes a maximum of approximately 5 rotations.

Result: 

NG 

REPLACE SPIRAL CABLE SUB-ASSEMBLY 

(Refer to REMOVAL [12/2015 - ] )

Result: 

OK 

See step  3

1. Disconnect the A44 driving support ECU connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D149-12 (DIST) - A44-7 (MODE)	Always	Below 1 Ω
   D149-12 (DIST) - Body ground	Always	10 kΩ or higher
   D149-2 (ECC) - Body ground	Always	Below 1 Ω

3. Reconnect the driving support ECU connector.

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

1. Turn the ignition switch to ON.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   A44-7 (MODE) - Body ground	Distance control switch on	0 to 2 V
   	Distance control switch off	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Driving Support ECU)

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

(Refer to PROBLEM SYMPTOMS TABLE [12/2015 - 08/2016] , or refer to PROBLEM SYMPTOMS TABLE [08/2016 - 11/2017] )

Result: 

NG 

REPLACE DRIVING SUPPORT ECU 

(Refer to REMOVAL [12/2015 - 11/2017] )