Toyota CH-R Service Manual: Brake Warning Light does not Come ON

DESCRIPTION

The skid control ECU (brake actuator assembly) is connected to the combination meter assembly via CAN communication.

CAUTION / NOTICE / HINT

NOTICE:

  • When replacing the skid control ECU (brake actuator assembly), perform system variant learning.

    Click here

  • Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

(a) Check if CAN communication system DTCs are output.

Click here

Result

Proceed to

DTCs are not output.

A

DTCs are output.

B

B

INSPECT CAN COMMUNICATION SYSTEM

A

2.

PERFORM ACTIVE TEST USING TECHSTREAM (BRAKE WARNING LIGHT)

(a) Select the Active Test on the Techstream.

Click here

Chassis > ABS/VSC/TRAC/EPB > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Brake Warning Light

Brake system warning light (red indicator)

Warning light ON/OFF

Observe combination meter assembly

Chassis > ABS/VSC/TRAC/EPB > Active Test

Tester Display

Brake Warning Light

(b) Select the Data List on the Techstream.

Click here

Chassis > ABS/VSC/TRAC/EPB > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Brake Warning Light

Brake system warning light (red indicator)

ON or OFF

ON: Warning light on

OFF: Warning light off

-

Chassis > ABS/VSC/TRAC/EPB > Data List

Tester Display

Brake Warning Light

(c) Check the operating condition of the brake system warning light (red indicator) when operating it using the Techstream.

Result

Proceed to

Brake system warning light (red indicator) in the Data List does not change using the Active Test.

A

Brake system warning light (red indicator) in the Data List turns ON/OFF using the Active Test.

B

A

REPLACE BRAKE ACTUATOR ASSEMBLY

B

3.

INSPECT COMBINATION METER ASSEMBLY

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

Click here

Body Electrical > Combination Meter > Active Test

Tester Display

Indicat. Lamp Brake

(b) Check the combination meter assembly.

OK:

The brake system warning light (red indicator) turns on or off in accordance with the Techstream.

OK

REPLACE BRAKE ACTUATOR ASSEMBLY

NG

INSPECT METER / GAUGE SYSTEM

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