Distance Control Switch Circuit [09/2020 - 11/2021]: Procedure

1. Read the Data List according to the display on the Techstream.

   Powertrain > Radar Cruise2 > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Vehicle-to-vehicle Distance Control Switch	Vehicle-to-vehicle distance control switch signal	ON or OFF	ON: Vehicle-to-vehicle distance control switch pushed OFF: Vehicle-to-vehicle distance control switch not pushed	-

   Powertrain > Radar Cruise2 > Data List 

   Tester Display
   Vehicle-to-vehicle Distance Control Switch

   OK

   The value of the Data List item changes according to the operation of the vehicle-to-vehicle distance control switch.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [09/2020 - 11/2021] 

Result: 

NG 

See step  2

Refer to INSPECTION [09/2020 - ]

Result

Result: 

NG 

REPLACE STEERING PAD SWITCH ASSEMBLY. Refer to  REMOVAL [10/2016 - ] 

Result: 

OK 

See step  3

Refer to INSPECTION [10/2016 - ]

Result

Result: 

NG 

REPLACE SPIRAL CABLE SUB-ASSEMBLY. Refer to  REMOVAL [10/2016 - ] 

Result: 

OK 

See step  4

1. Disconnect the S18 forward recognition camera connector.
2. Disconnect the A91 ECM connector (for 8AR-FTS).
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   FOR 8AR-FTS:
   
   

   Tester Connection	Condition	Specified Condition
   K26-12 (DIST) - S18-3 (LKSW)	Always	Below 1 Ω
   K26-2 (ECC) - A91-41 (ECCS)	Always	Below 1 Ω
   K26-12 (DIST) or S18-3 (LKSW) - Body ground	Always	10 kΩ or higher
   K26-2 (ECC) or A91-41 (ECCS) - Body ground	Always	10 kΩ or higher

   FOR 2GR-FKS:
   
   

   Tester Connection	Condition	Specified Condition
   K26-12 (DIST) - S18-3 (LKSW)	Always	Below 1 Ω
   K26-2 (ECC) - Body ground	Always	Below 1 Ω
   K26-12 (DIST) or S18-3 (LKSW) - Body ground	Always	10 kΩ or higher

   Result

   Result	Proceed to
   OK (for 8AR-FTS)	A
   OK (for 2GR-FKS)	B
   NG	C

Result: 

B 

REPLACE FORWARD RECOGNITION CAMERA. Refer to  REMOVAL [09/2020 - ] 

Result: 

C 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

A 

See step  5

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the F78 ECM connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A91-41 (ECCS) - F78-53 (E1)	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE FORWARD RECOGNITION CAMERA. Refer to  REMOVAL [09/2020 - ] 

Result: 

NG 

REPLACE ECM. Refer to  REMOVAL [10/2017 - ]