VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS) > Warning Light Illumination Pattern

BRAKE WARNING LIGHT DOES NOT GO OFF

DETECTING CONDITION:

• Brake warning light circuit is shorted.

• Defective sensor/connector

• Defective CAN communication

TROUBLE SYMPTOM:

After starting the engine, the brake warning light remains lit though the parking lever is released.

WIRING DIAGRAM:

• LHD model

• RHD model

STEPCHECKYESNO

1.CHECK INSTALLATION OF VDCCM&H/U CONNECTOR.

1) Turn the ignition switch to OFF.

2) Check that the VDCCM&H/U connector is inserted until it is locked by clamp.

Is the connector firmly inserted?

Insert the VDCCM&H/U connector until it is locked by clamp.

2.READ DTC.

Read the DTC.

Is DTC displayed?

Perform the diagnosis according to DTC.

3.CHECK BRAKE FLUID AMOUNT.

Check the amount of brake fluid in the reservoir tank of master cylinder.

Is the amount of brake fluid between the lines of “MAX” and “MIN”?

Replenish brake fluid to the specified value.

4.CHECK BRAKE FLUID LEVEL SWITCH.

1) Turn the ignition switch to OFF.

2) Disconnect the level switch connector (B16) from master cylinder.

3) Measure the resistance of master cylinder terminals.

Terminals

No. 1 — No. 2:

Is the resistance 1 MΩ or more?

Replace the master cylinder.

5.CHECK GROUND SHORT OF HARNESS.

1) Disconnect the connector (i10) from combination meter.

2) Measure the resistance between combination meter connector and chassis ground.

Connector & terminal

(i10) No. 8 — Chassis ground:

Is the resistance 1 MΩ or more?

Repair the harness between combination meter and brake fluid level switch.

6.CHECK PARKING BRAKE SWITCH.

1) Disconnect the connector (R4) from parking brake switch.

2) Release the parking brake.

3) Measure the resistance between parking brake switch terminal and chassis ground.

Is the resistance 1 MΩ or more?

Replace the parking brake switch.

7.CHECK GROUND SHORT OF HARNESS.

1) Disconnect the connector (B281) from body integrated unit.

2) Measure the resistance between body integrated unit connector and chassis ground.

Connector & terminal

(B281) No. 15 — Chassis ground:

Is the resistance 1 MΩ or more?

Repair the harness between body integrated unit and parking brake switch.

8.CHECK POOR CONTACT OF CONNECTOR.

Check for poor contact of all connectors.

Is there poor contact?

Repair the connector.

9.CHECK LAN SYSTEM.

Perform the diagnosis for LAN system.

Is there any fault in LAN system?

Perform the diagnosis according to DTC for LAN system.

10.CHECK COMBINATION METER.

Check the combination meter.

Is combination meter OK?

Replace the VDCCM only.

Repair the combination meter.