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 the next step.
2	Does the brake fluid need replenishment?	Yes	Add brake fluid.
2	Does the brake fluid need replenishment?	No	With malfunction warning light: Go to Step 4. Without malfunction warning light: Go to the next step.
3	Reactive the DTC of PCM using M-MDS. (See ON-BOARD DIAGNOSTIC TEST [MZR 2.5] .) Is the DTC P0571:00 or P0703:00 detected?	Yes	Go to the applicable DTC troubleshooting procedure. (See DTC P0571:00 [MZR 2.5] .) (See DTC P0703:00 [MZR 2.5] .)
3		No	Go to the next step.
4	Reactive the DTC of instrument cluster using M-MDS. (See DTC TABLE [INSTRUMENT CLUSTER] .) Is the DTC detected?	Yes	If the DTC U0415:68 or U0415:92 is not detected: Go to the applicable DTC troubleshooting procedure. (See DTC TABLE [INSTRUMENT CLUSTER] .) If the DTC U0415:68 or U0415:92 is detected: Inspect the DTC for the DSC HU/CM. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)] .)
4		No	Go to the next step.
5	Inspect followings: Brake fluid level sensor Parking brake switch Wiring harness between brake fluid level sensor and BCM terminal 1N Wiring harness between parking brake switch and BCM terminal 2Q Is there any malfunction?	Yes	Repair or replace malfunctioning part.
5		No	Go to the next step.
6	Turn off the brake system warning light using M-MDS instrument cluster according to active command modes WL+IL. (See ACTIVE COMMAND MODES TABLE [INSTRUMENT CLUSTER] .) Does the brake system warning light turn off active command modes?	Yes	Go to the next step.
6		No	Replace the instrument cluster. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION .)
7	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.
7		No	Go to Step 8.
8	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.
8		No	Replace the instrument cluster.
9	Switch the ignition OFF (LOCK). 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.
9		No	Repair or replace the terminal.
10	Disconnect the negative battery cable. Measure the resistance between the instrument cluster connector terminals B and D. Is the resistance 114-126 ohms ?	Yes	Inspect the wiring harness and CAN system-related module. Repair or replace the malfunctioning part.
10		No	Replace the instrument cluster. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION .)