NO.7 BRAKE SYSTEM WARNING LIGHT STAYS ON MORE THAN 4 S WITH SWITCH THE IGNITION TO ON [ABS]

id0403a5891800

7	BRAKE system warning light stays on more than 4 s with switch the ignition to on. (Parking brake is released.)
[TROUBLESHOOTING HINTS] •  Malfunction of instrument cluster or ABS HU/CM •  Short to ground in circuit in parking brake switch and/or brake fluid level sensor •  Parking brake switch or brake fluid level sensor stuck on •  Short to GND in wiring between parking brake switch and BCM •  Short to GND in wiring between brake fluid level sensor and BCM

Diagnostic procedure

STEP	INSPECTION		ACTION
1	INSPECT BRAKE FLUID LEVEL •  Is the brake fluid level normal?	Yes	Go to Step 3.
		No	Go to the next step.
2	INSPECT BRAKE LINE FOR LEAKAGE •  Is the brake fluid leaked?	Yes	Replace the leakage part. Refill the brake fluid specified level.
		No	Refill the brake fluid specified level.
3	INSPECT WHETHER MALFUNCTION IS IN BRAKE SYSTEM WARNING LIGHT RELATED SWITCHES OR ELSEWHERE •  Inspect following parts for continuity. ―  Parking brake switch (See PARKING BRAKE SWITCH INSPECTION.) ―  Brake fluid level sensor (See BRAKE FLUID LEVEL SENSOR INSPECTION.) •  Is the continuity condition normal?	Yes	Go to the next step.
		No	Replace the malfunctioning part. (See PARKING BRAKE LEVER REMOVAL/INSTALLATION.) (See MASTER CYLINDER REMOVAL/INSTALLATION [L.H.D.].) (See MASTER CYLINDER REMOVAL/INSTALLATION [R.H.D.].)
*4	INSPECT FOR SHORT TO GND CIRCUIT IN WIRING HARNESS BETWEEN BCM AND BRAKE SYSTEM WARNING LIGHT RELATED SWITCHES •  Inspect for short to GND circuit wiring for following: ―  Between parking switch and BCM terminal 8A ―  Between brake fluid level sensor and BCM terminal 1Q •  Is the short to GND circuit detected?	Yes	Repair or replace malfunctioning part for short to GND circuit.
		No	Go to the next step.
5	INSPECT WHETHER MALFUNCTION IS IN INSTRUMENT CLUSTER OR BCM •  Release the parking brake. •  Turn off all warning lights and indicator light using M-MDS instrument cluster active command modes PID WL+IL. (See ACTIVE COMMAND MODES INSPECTION [INSTRUMENT CLUSTER].) •  Does the brake system warning light stay on?	Yes	Replace the instrument cluster. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
		No	Replace the BCM. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)