Diagnostic Procedure

STEP	INSPECTION		ACTION
1	Start the engine. Release the parking brake. Does the brake system warning light turn off?	Yes	Troubleshooting completed. (The system is normal.)
1		No	Go to next step.
2	Does the brake fluid need replenishment?	Yes	Inspect brake line for leakage. Repair or replace if necessary. Add brake fluid.
2	Does the brake fluid need replenishment?	No	MZR 2.5 Go to the next step. MZI 3.7 V6 Go to Step 4.
3	Inspect followings: (See ON-BOARD DIAGNOSTIC TEST [MZR 2.5] .) Brake fluid level sensor or connector (See BRAKE FLUID LEVEL SENSOR INSPECTION .) Parking brake switch or connector (See PARKING BRAKE SWITCH INSPECTION .) Wiring harness between brake fluid level sensor and BCM terminal 1Q Wiring harness between parking brake switch and BCM terminal 8A Is there any malfunction?	Yes	Repair or replace malfunctioning part.
3		No	Go to the next step.
4	Start the engine. Verify that the warning lights and indicator lights condition. Do two or more lights illuminate at the same time.	Yes	Go to Step 7.
4		No	Go to the next step.
5	Retrieve the DTC of DSC HU/CM and BCM using the M-MDS. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)] .) (See DTC INSPECTION [BCM] .) Is there any DTC retrieved?	Yes	Go to the applicable troubleshooting procedure. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)] .) (See DTC TABLE [BCM] .)
5		No	Go to the next step.
6	Turn off the ABS warning light using the M-MDS instrument cluster active command modes WL+IL. (See ACTIVE COMMAND MODES TABLE [INSTRUMENT CLUSTER] .) Does the ABS warning light turn off according to the active command modes?	Yes	Verify that the DSC HU/CM connector is connected securely. If the DSC HU/CM connector is poorly connected: Connect the DSC HU/CM connector securely. If a malfunction is in the DSC HU/CM connector: Replace the DSC HU/CM. (See DSC HU/CM REMOVAL/INSTALLATION .) If a malfunction is in the vehicle side connector: Repair or replace malfunctioning part.
6		No	Replace the instrument cluster. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION .)
7	Retrieve the DTC related to the instrument cluster using the M-MDS. (See DTC INSPECTION [INSTRUMENT CLUSTER] .) Is there any DTC retrieved?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [INSTRUMENT CLUSTER] .)
7		No	Go to the next step.
8	Inspect the brake fluid level sensor, parking brake switch or connectors. Is there any malfunction?	Yes	Repair or replace the malfunctioning part.
8		No	Go to the next step.
9	Disconnect the negative battery cable. Measure the resistance between the DLC-2 terminals F and E. Is the resistance below 60 ohms ?	Yes	Go to the next step.
9		No	Go to Step 12.
10	Disconnect the negative battery cable. Inspect the DLC-2 terminals F and E for short to power supply or ground. Is there any malfunction?	Yes	Inspect the wiring harness and CAN system-related module. Repair or replace the malfunctioning part.
10		No	Replace the instrument cluster.
11	Switch the ignition to off. Inspect the instrument cluster connector terminals for poor connection (such as damaged/pulled-out pins, and corrosion). Are the terminals normal?	Yes	Go to the next step.
11		No	Repair or replace the terminal.
12	Disconnect the negative battery cable. Measure the resistance between the instrument cluster connector terminals 2X and 2W. Is the resistance 114-126 ohms?	Yes	Inspect the wiring harness and CAN system-related module. Repair or replace the malfunctioning part.
12		No	Replace the instrument cluster. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION .)