Brake Warning Light Remains ON

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: Brake Warning Light Remains ON

Brake Warning Light Remains ON

DESCRIPTION

The BRAKE warning light comes on when the brake fluid is insufficient, the parking brake is applied or the EBD is defective.

WIRING DIAGRAM

INSPECTION PROCEDURE
HINT: When releasing the parking brake, move the shift lever into the P position in an AT vehicle, and choke in an MT vehicle to hold the vehicle for safety.

PROCEDURE

1. CHECK BRAKE FLUID LEVEL
(a) Check that the brake fluid level is proper.
NG -- ADD BRAKE FLUID
OK -- Continue to next step.
2. CHECK DTC
(a) Are the DTC recorded? Vehicle Stability Control System

Result:

B -- CHECK BRAKE WARNING LIGHT
A -- REPAIR CIRCUITS INDICATED BY OUTPUT DTCS
3. CHECK BRAKE WARNING LIGHT
(a) WHEN USING TECHSTREAM:
(1) Connect Techstream to the DLC3.
(2) Start the engine.
(3) Select the item "Brake Warning Lamp" in the Active Test and operate the BRAKE warning light on Techstream.

ABS / VSC / TRAC:

(4) Check that "ON" and "OFF" of the BRAKE warning light are indicated on the combination meter when using Techstream.
OK:
Turn the BRAKE warning light on or off in accordance with Techstream.
(b) WHEN NOT USING TECHSTREAM:
(1) Turn the ignition switch off and disconnect the connector from the skid control ECU.

(2) Ground terminal BRL of the skid control ECU.
(3) Turn the ignition switch to the ON position.
(4) Check that the brake warning light.
OK:
Turn the light on or off in accordance with the connection of terminal GND and BRL.
NOTE: When replacing the brake actuator assembly, perform zero point calibration Programming and Relearning.

NG -- INSPECT PARKING BRAKE SWITCH
OK -- REPLACE BRAKE ACTUATOR ASSEMBLY
4. INSPECT PARKING BRAKE SWITCH
(a) Remove the parking brake switch connector.

(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:

NG -- REPLACE PARKING BRAKE SWITCH
OK -- Continue to next step.
5. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - PARKING BRAKE SWITCH)
(a) Disconnect the skid control ECU connector and the parking brake switch connector.

(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
6. INSPECT BRAKE FLUID LEVEL WARNING SWITCH
(a) Remove the reservoir tank cap and strainer.
(b) Disconnect the brake fluid level warning switch connector.

NG -- REPLACE BRAKE MASTER CYLINDER RESERVOIR SUB-ASSEMBLY (BRAKE FLUID LEVEL WARNING SWITCH)
OK -- Continue to next step.
7. CHECK HARNESS AND CONNECTOR (BRAKE FLUID LEVEL WARNING SWITCH - COMBINATION METER)
(a) Disconnect the combination meter connector and the brake fluid level warning switch connector.

(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPAIR OR REPLACE COMBINATION METER ASSEMBLY