Brake Warning Light does not Come ON [01/2019 - 09/2022]: Procedure

1. Check if CAN communication system DTCs are output.

   Refer to DIAGNOSIS SYSTEM [01/2019 - 04/2020] , or refer to DIAGNOSIS SYSTEM [04/2020 - 09/2022]

   Result

   Result	Proceed to
   DTCs are not output.	A
   DTCs are output.	B

Result: 

B 

INSPECT CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [01/2019 - 09/2022] 

Result: 

A 

See step  2

1. Select the Active Test on the Techstream.

   Refer to DATA LIST / ACTIVE TEST [01/2019 - 09/2022]

   Chassis > ABS/VSC/TRAC > Active Test 

   Tester Display	Measurement Item	Control Range	Diagnostic Note
   Brake Warning Light	Brake warning light / red (malfunction)	Warning light ON/OFF	Observe combination meter assembly

   Chassis > ABS/VSC/TRAC > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Brake Warning Light	Brake warning light / red (malfunction)	ON or OFF	ON: Warning light on OFF: Warning light off	-

   Chassis > ABS/VSC/TRAC > Active Test 

   Active Test Display
   Brake Warning Light

   Data List Display
   Brake Warning Light

2. Check the operating condition of the brake warning light / red (malfunction) when operating it using the Techstream.

   Result

   Result	Proceed to
   Brake warning light / red (malfunction) in the Data List does not change using the Active Test.	A
   Brake warning light / red (malfunction) in the Data List turns ON/OFF using the Active Test.	B

Result: 

A 

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY. Refer to  REMOVAL [01/2019 - 09/2022] 

Result: 

B 

See step  3

1. Perform the Active Test of the combination meter assembly (meter CPU) using the Techstream.

   Refer to DATA LIST / ACTIVE TEST [01/2019 - 09/2022]

   Body Electrical > Combination Meter > Active Test 

   Tester Display
   Brake Warning

2. Check the combination meter assembly.

   OK

   The brake warning light / red (malfunction) turns on or off in accordance with Techstream operation.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY. Refer to  REMOVAL [01/2019 - 09/2022] 

Result: 

NG 

INSPECT METER / GAUGE SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [01/2019 - 09/2022]