NO.2 ANY OF THE FOLLOWING LIGHTS STAY ON: (ABS WARNING LIGHT, BRAKE SYSTEM WARNING LIGHT, DSC INDICATOR LIGHT AND/OR DSC OFF LIGHT) [DYNAMIC STABILITY CONTROL (DSC)]

2	Any of the following lights stay on: • ABS warning light • Brake system warning light • DSC indicator light • DSC OFF light
Possible cause	• Brake fluid level is low • Parking brake lever is not released • Brake system warning light related switches malfunction ― Parking brake switch malfunction ― Brake fluid level sensor malfunction • Brake system warning light related wiring harness malfunction ― Short to ground in parking brake switch circuit ― Short to ground in brake fluid level sensor circuit • BCM DTC is stored • BCM malfunction • DSC HU/CM DTC is stored • DSC HU/CM connector or terminals malfunction • DSC HU/CM power supply malfunction ― DSC HU/CM power supply fuse malfunction ― DSC HU/CM power supply circuit malfunction • Open circuit in DSC HU/CM power supply circuit • Open circuit in DSC HU/CM ground circuit • DSC HU/CM malfunction • Instrument cluster DTC is stored • Instrument cluster malfunction • Communication error between DSC HU/CM and SAS control module is detected • DSC HU/CM malfunction

Any of the following lights stay on:

• ABS warning light

• Brake system warning light

• DSC indicator light

• DSC OFF light

Possible cause

• Brake fluid level is low

• Parking brake lever is not released

• Brake system warning light related switches malfunction

― Parking brake switch malfunction

― Brake fluid level sensor malfunction

• Brake system warning light related wiring harness malfunction

― Short to ground in parking brake switch circuit

― Short to ground in brake fluid level sensor circuit

• BCM DTC is stored

• BCM malfunction

• DSC HU/CM DTC is stored

• DSC HU/CM connector or terminals malfunction

• DSC HU/CM power supply malfunction

― DSC HU/CM power supply fuse malfunction

― DSC HU/CM power supply circuit malfunction

• Open circuit in DSC HU/CM power supply circuit

• Open circuit in DSC HU/CM ground circuit

• DSC HU/CM malfunction

• Instrument cluster DTC is stored

• Instrument cluster malfunction

• Communication error between DSC HU/CM and SAS control module is detected

• DSC HU/CM malfunction

STEP	INSPECTION	ACTION
1	INSPECT BRAKE FLUID LEVEL • Inspect the brake fluid level. • Is the brake fluid level normal?	Yes	Go to the next step.
No	Add the brake fluid. If the brake fluid refilled: • Inspect and repair brake line for leakage.
2	VERIFY PARKING BRAKE • Verify the parking brake. • Is the parking brake lever released?	Yes	Go to the next step.
No	Release the parking brake lever.
3	CONFIRM SYMPTOM • Confirm the brake system warning light. • Is it only brake system warning light remains on?	Yes	Go to the next step.
No	Go to Step 6.
4	INSPECT WHETHER MALFUNCTION IS IN BRAKE SYSTEM WARNING LIGHT RELATED SWITCHES OR ELSEWHERE • Inspect for following part: ― Parking brake switch (See PARKING BRAKE SWITCH INSPECTION.) ― Brake fluid level sensor (See BRAKE FLUID LEVEL SENSOR INSPECTION.) • Is there any malfunction?	Yes	Replace the malfunctioning part according to the inspection results. (See PARKING BRAKE LEVER REMOVAL/INSTALLATION.) (See MASTER CYLINDER REMOVAL/INSTALLATION [MZR 1.5, MZR 1.6, MZR 2.0, MZR 2.5, MZ-CD 1.6, MZR-CD 2.2].) (See MASTER CYLINDER REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop, SKYACTIV-G 2.0].) (See MASTER CYLINDER REMOVAL/INSTALLATION [MZR 2.3 DISI Turbo].)
No	Go to the next step.
^*5	INSPECT FOR SHORT TO GROUND IN WIRING HARNESS BETWEEN BCM AND BRAKE SYSTEM WARNING LIGHT RELATED SWITCHES • Switch the ignition to off. • Disconnect the negative battery cable. • Disconnect the parking brake switch and brake fluid level sensor connectors. • Inspect for continuity between the following terminals (wiring harness-side) and body ground: ― Parking brake switch terminal A ― Brake fluid level sensor terminal B • Is there continuity?	Yes	Repair or replace the wiring harness for a possible short to ground.
No	Retrieve the BCM DTC using the M-MDS. (See DTC INSPECTION [BCM].) If the DTC present: • Go to the applicable DTC inspection. (See DTC TABLE [BCM].) If the DTC does not present: • Replace the BCM. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION [L.H.D.].) (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION [R.H.D.].)
6	CONFIRM DSC HU/CM DTC • Start the engine and drive the vehicle at 10 km/h {6.2 mph} or more. • Retrieve the DSC HU/CM DTC using the M-MDS. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].)
No	If the communication error message is displayed on the M-MDS screen: • Go to the next step. If the communication error is not displayed: • Go to Step 11.
7	INSPECT DSC HU/CM CONNECTOR AND TERMINALS • Switch the ignition to off. • Disconnect the negative battery cable. • Disconnect the DSC HU/CM connector. • Inspect for poor connection (such as damaged/pulled-out pins, and corrosion). • Is there any malfunction?	Yes	Repair or replace the connector or terminals, then go to Step 11.
No	Go to the next step.
8	INSPECT DSC HU/CM POWER SUPPLY FUSE • Inspect the DSC HU/CM ignition power supply fuse. • Is the fuse normal?	Yes	Go to the next step.
No	Inspect for open circuit in DSC HU/CM ignition power supply circuit. Repair or replace if necessary. Install appropriate amperage fuse.
^*9	INSPECT DSC HU/CM POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT • DSC HU/CM connector is disconnected. • Reconnect the negative battery cable. • Switch the ignition to ON. • Measure the voltage between DSC HU/CM terminal Y (wiring harness-side) and body ground. • Is the voltage approx. 12 V?	Yes	Go to the next step.
No	Repair or replace the wiring harness for a possible open circuit.
^*10	INSPECT DSC HU/CM GROUND CIRCUIT FOR OPEN CIRCUIT • DSC HU/CM connector is disconnected. • Switch the ignition to off. • Disconnect the negative battery cable. • Inspect for continuity between DSC HU/CM terminal B (wiring harness-side) and body ground. • Is there continuity?	Yes	Replace the DSC HU/CM (open circuit in DSC HU/CM). (See DSC HU/CM REMOVAL/INSTALLATION.)
No	Repair or replace the wiring harness for a possible open circuit.
11	CONFIRM INSTRUMENT CLUSTER DTC • Retrieve the instrument cluster DTC using the M-MDS. (See DTC INSPECTION [INSTRUMENT CLUSTER].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [INSTRUMENT CLUSTER].)
No	Go to the next step.
12	VERIFY WHETHER MALFUNCTION IS IN INSTRUMENT CLUSTER OR BCM • Turn off and on all warning light and indicator lights using the instrument cluster PID WL+IL of active command modes using the M-MDS. (See ACTIVE COMMAND MODES INSPECTION [INSTRUMENT CLUSTER].) • Do the ABS warning light, brake system warning light, DSC indicator light and DSC OFF light turn on and off according to active command modes?	Yes	Replace the DSC HU/CM (DSC HU/CM internal fault). (See DSC HU/CM REMOVAL/INSTALLATION.)
No	Replace the instrument cluster. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)

STEP

INSPECTION

ACTION

INSPECT BRAKE FLUID LEVEL

• Inspect the brake fluid level.

• Is the brake fluid level normal?

Yes

Go to the next step.

Add the brake fluid.

If the brake fluid refilled:

• Inspect and repair brake line for leakage.

VERIFY PARKING BRAKE

• Verify the parking brake.

• Is the parking brake lever released?

Yes

Go to the next step.

Release the parking brake lever.

CONFIRM SYMPTOM

• Confirm the brake system warning light.

• Is it only brake system warning light remains on?

Yes

Go to the next step.

Go to Step 6.

INSPECT WHETHER MALFUNCTION IS IN BRAKE SYSTEM WARNING LIGHT RELATED SWITCHES OR ELSEWHERE

• Inspect for following part:

― Parking brake switch

(See PARKING BRAKE SWITCH INSPECTION.)

― Brake fluid level sensor

(See BRAKE FLUID LEVEL SENSOR INSPECTION.)

• Is there any malfunction?

Yes

Replace the malfunctioning part according to the inspection results.

(See PARKING BRAKE LEVER REMOVAL/INSTALLATION.)

(See MASTER CYLINDER REMOVAL/INSTALLATION [MZR 1.5, MZR 1.6, MZR 2.0, MZR 2.5, MZ-CD 1.6, MZR-CD 2.2].)

(See MASTER CYLINDER REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop, SKYACTIV-G 2.0].)

(See MASTER CYLINDER REMOVAL/INSTALLATION [MZR 2.3 DISI Turbo].)

Go to the next step.

^*5

INSPECT FOR SHORT TO GROUND IN WIRING HARNESS BETWEEN BCM AND BRAKE SYSTEM WARNING LIGHT RELATED SWITCHES

• Switch the ignition to off.

• Disconnect the negative battery cable.

• Disconnect the parking brake switch and brake fluid level sensor connectors.

• Inspect for continuity between the following terminals (wiring harness-side) and body ground:

― Parking brake switch terminal A

― Brake fluid level sensor terminal B

• Is there continuity?

Yes

Repair or replace the wiring harness for a possible short to ground.

Retrieve the BCM DTC using the M-MDS.

(See DTC INSPECTION [BCM].)

If the DTC present:

• Go to the applicable DTC inspection.

(See DTC TABLE [BCM].)

If the DTC does not present:

• Replace the BCM.

(See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION [L.H.D.].)

(See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION [R.H.D.].)

CONFIRM DSC HU/CM DTC

• Start the engine and drive the vehicle at 10 km/h {6.2 mph} or more.

• Retrieve the DSC HU/CM DTC using the M-MDS.

(See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].)

If the communication error message is displayed on the M-MDS screen:

• Go to the next step.

If the communication error is not displayed:

• Go to Step 11.

INSPECT DSC HU/CM CONNECTOR AND TERMINALS

• Switch the ignition to off.

• Disconnect the negative battery cable.

• Disconnect the DSC HU/CM connector.

• Inspect for poor connection (such as damaged/pulled-out pins, and corrosion).

• Is there any malfunction?

Yes

Repair or replace the connector or terminals, then go to Step 11.

Go to the next step.

INSPECT DSC HU/CM POWER SUPPLY FUSE

• Inspect the DSC HU/CM ignition power supply fuse.

• Is the fuse normal?

Yes

Go to the next step.

Inspect for open circuit in DSC HU/CM ignition power supply circuit.

Repair or replace if necessary.

Install appropriate amperage fuse.

^*9

INSPECT DSC HU/CM POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT

• DSC HU/CM connector is disconnected.

• Reconnect the negative battery cable.

• Switch the ignition to ON.

• Measure the voltage between DSC HU/CM terminal Y (wiring harness-side) and body ground.

• Is the voltage approx. 12 V?

Yes

Go to the next step.

Repair or replace the wiring harness for a possible open circuit.

^*10

INSPECT DSC HU/CM GROUND CIRCUIT FOR OPEN CIRCUIT

• DSC HU/CM connector is disconnected.

• Switch the ignition to off.

• Disconnect the negative battery cable.

• Inspect for continuity between DSC HU/CM terminal B (wiring harness-side) and body ground.

• Is there continuity?

Yes

Replace the DSC HU/CM (open circuit in DSC HU/CM).

(See DSC HU/CM REMOVAL/INSTALLATION.)

Repair or replace the wiring harness for a possible open circuit.

CONFIRM INSTRUMENT CLUSTER DTC

• Retrieve the instrument cluster DTC using the M-MDS.

(See DTC INSPECTION [INSTRUMENT CLUSTER].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [INSTRUMENT CLUSTER].)

Go to the next step.

VERIFY WHETHER MALFUNCTION IS IN INSTRUMENT CLUSTER OR BCM

• Turn off and on all warning light and indicator lights using the instrument cluster PID WL+IL of active command modes using the M-MDS.

(See ACTIVE COMMAND MODES INSPECTION [INSTRUMENT CLUSTER].)

• Do the ABS warning light, brake system warning light, DSC indicator light and DSC OFF light turn on and off according to active command modes?

Yes

Replace the DSC HU/CM (DSC HU/CM internal fault).

(See DSC HU/CM REMOVAL/INSTALLATION.)

Replace the instrument cluster.

(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)

• When performing an asterisked (^*) troubleshooting inspection, shake the wiring harness and connectors while doing the inspection to discover whether poor contact points are the cause of any intermittent malfunctions. If there is a problem, check to make sure connectors, terminals and wiring harness are connected correctly and undamaged.