2

Any of the following lights remain illuminated: (ABS warning light, TCS/DSC indicator light and/or DSC OFF indicator light)

POSSIBLE CAUSE

• No connection at DSC HU/CM connector (When DSC HU/CM connector is removed, ABS warning light, brake system warning light, TCS/DSC indicator light, and DSC OFF indicator light are illuminated.)

• DSC HU/CM detected malfunction (Input and output device malfunction).

• DSC HU/CM detects low voltage in power supply.

• DSC HU/CM ground malfunction (When DSC HU/CM ground is not securely connected, ABS warning light, brake system warning light, TCS/DSC indicator light, and DSC OFF indicator light are illuminated but DTCs are not displayed.)

• DSC HU/CM does not operate.

• PCM detected malfunction.

• Error signal input from PCM

• Communication error between DSC HU/CM and instrument cluster

• Communication error between DSC HU/CM and PCM

• Communication error between DSC HU/CM and EPS CM

• After replacing SAS control module the low-G sensor and yaw rate sensor initialization have not been performed.

• After replacing DSC HU/CM, the brake fluid pressure sensor initialization has not been performed.

• Non-completion of module configuration (When module configuration is not performed after replacing DSC HU/CM, ABS warning light remains illuminated.)

• DSC HU/CM internal malfunction

STEP

INSPECTION

ACTION

1

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

  (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 a communication error message is displayed on the M-MDS (IDS) screen:

• Go to the next step.

If a communication error message is not displayed:

• Go to Step 6.

2

• Inspect connection of the DSC HU/CM connector.

• Is the DSC HU/CM connector connected securely?

Yes

Go to the next step.

No

Connect the DSC HU/CM connector securely, then go to Step 6.

3

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

• Is the fuse normal?

Yes

Go to the next step.

No

Inspect the blown fuse’s circuit for a short to ground.

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

Install appropriate amperage fuse.

^*4

• Switch the ignition ON.

• Measure the voltage at the DSC HU/CM terminal Q (wiring harness-side).

• Is the voltage approx. 12 V?

Yes

Go to the next step.

No

Refer to the wiring diagram and verify whether or not there is a common connector between DSC HU/CM terminal Q (wiring harness-side) and ignition switch.

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has an open circuit.

^*5

• Switch the ignition off.

• Disconnect the DSC HU/CM connector.

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

• Is there continuity?

Yes

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

(See DSC HU/CM REMOVAL/INSTALLATION.)

No

Repair or replace the wiring harness for a possible open circuit and poor contact at the ground point.

6

• Retrieve the PCM DTCs using the M-MDS (IDS).

  (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.5].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [SKYACTIV-G 2.5].)

No

Go to the next step.

7

• Verify if the malfunction is caused by initialization procedure for the brake fluid pressure sensor not being performed.

• Has the initial setting for the brake fluid pressure sensor been performed after replacing the DSC HU/CM?

Yes

Go to the next step.

No

Perform the brake fluid pressure sensor initial setting.

(See DSC RELATED PARTS SENSOR INITIALIZATION PROCEDURE.)

8

• Verify if the malfunction is caused by the initialization procedure for the low-G sensor not being performed.

• Has the initial setting for the low-G sensor been performed after replacing the DSC HU/CM and the SAS control module?

Yes

Go to the next step.

No

Perform the low-G sensor initial setting.

(See DSC RELATED PARTS SENSOR INITIALIZATION PROCEDURE.)

9

• Verify if the malfunction is caused by the initialization procedure for the yaw rate sensor not being performed.

• Has the initial setting for the yaw rate sensor been performed after replacing the DSC HU/CM and the SAS control module?

Yes

Go to the next step.

No

Perform the yaw rate sensor initial setting.

(See DSC RELATED PARTS SENSOR INITIALIZATION PROCEDURE.)

10

• Connect the M-MDS (IDS) to the DLC-2.

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

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

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

Yes

Replace the DSC HU/CM. (Internal malfunction)

(See DSC HU/CM REMOVAL/INSTALLATION.)

No

Replace the instrument cluster.

(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)