Parking Brake Switch Circuit [12/2021 - 10/2022]: Procedure

1. Check that the brake warning light comes on when the parking brake is applied and goes off when it is released.

   OK

   The brake warning light operates as specified above.

   Result

   Result	Proceed to
   OK (for Gasoline Model)	A
   OK (for HV Model)	B
   NG	C

Result: 

B 

See step  3

Result: 

C 

GO TO ELECTRIC PARKING BRAKE SYSTEM 

for Gasoline Model: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ]

for HV Model: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2021 - ]

Result: 

A 

See step  2

1. Disconnect the G2 radio and display receiver assembly connector.
2. Disconnect the A39 skid control ECU (brake actuator assembly) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G2-20 (PKB) - A39-35 (PKB)	Always	Below 1 Ω
   G2-20 (PKB) or A39-35 (PKB) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [10/2019 - 10/2022] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the G2 radio and display receiver assembly connector.
2. Disconnect the A105 No. 2 skid control ECU (brake actuator assembly) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G2-20 (PKB) - A105-24 (PKB)	Always	Below 1 Ω
   G2-20 (PKB) or M36-5 (PKB) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [10/2019 - 10/2022] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR