Brake Warning Light Remains ON [09/2022 - ]: Procedure

1. Check that all of the following conditions required for the brake system warning light (red indicator) to turn off are met:
   1. The ABS warning light is not illuminated.

      HINT: 

      If the ABS warning light remains illuminated, make sure that the conditions required for the ABS warning light to turn off are met.

      Refer to PROBLEM SYMPTOMS TABLE [09/2022 - 11/2022] , or refer to PROBLEM SYMPTOMS TABLE [11/2022 - ]

   2. The brake fluid level in the brake master cylinder reservoir assembly is not low.
   3. Ensure that the brake booster has sufficient vacuum.

      HINT: 

      When the vacuum inside the brake booster decreases, the brake system warning light (red indicator) comes on.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  2

1. With a sufficient level of brake fluid, disconnect the A67 brake fluid level warning switch (brake master cylinder reservoir assembly) connector and confirm that the brake system warning light (red indicator) illuminates.

   OK

   The brake system warning light (red indicator) does not turn off.

   HINT: 

   If the brake system warning light (red indicator) turns off, there is a short in the brake fluid level warning switch (brake master cylinder reservoir assembly) circuit.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE BRAKE MASTER CYLINDER RESERVOIR ASSEMBLY 

Refer to DISASSEMBLY [06/2018 - ]

Result: 

OK 

See step  3

1. Turn the ignition switch off.
2. Make sure that there is no looseness at the locking part and the connecting part of the connectors.

   OK

   The connector is securely connected.

3. Disconnect the I4 combination meter assembly connector.
4. Check both the connector case and the terminals for deformation and corrosion.

   OK

   No deformation or corrosion.

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I4-11 (SW) - A67-1 (+)	Always	Below 1 Ω
   I4-11 (SW) or A67-1 (+) - Body ground	Always	10 kΩ or higher
   A67-2 (E) - Body ground	1 minute or more after disconnecting the cable from the negative (-) battery terminal	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

1. Inspect the vacuum warning switch assembly.

   Refer to ON-VEHICLE INSPECTION [09/2022 - ]

   OK

   The vacuum warning switch assembly is normal.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE VACUUM WARNING SWITCH ASSEMBLY 

Refer to REMOVAL [09/2022 - 11/2022] , or refer to REMOVAL [11/2022 - ]

Result: 

OK 

See step  5

1. Disconnect the A65 vacuum warning switch assembly connector.
2. Disconnect the I4 combination meter assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I4-27 (VCM) - A65-2 (+)	Always	Below 1 Ω
   I4-27 (VCM) or A65-2 (+) - Body ground	Always	10 kΩ or higher
   A65-1 (E) - Body ground	1 minute or more after disconnecting the cable from the negative (-) battery terminal	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  6

1. Reconnect the I4 combination meter assembly connector.
2. Reconnect the A67 brake fluid level warning switch (brake master cylinder reservoir assembly) connector.
3. Perform the Active Test of the combination meter assembly using the GTS.

   Body Electrical > Combination Meter > Active Test 

   Tester Display
   Multi Display All (White)

4. Check the combination meter assembly.

   OK

   The multi-information display turns on or off in accordance with GTS operation.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE BRAKE ACTUATOR ASSEMBLY 

Refer to REMOVAL [09/2022 - 11/2022] , or refer to REMOVAL [11/2022 - 09/2024] , or refer to REMOVAL [09/2024 - ]

Result: 

NG 

INSPECT METER / GAUGE SYSTEM 

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2022 - 11/2022] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2022 - ]