4

A malfunction in the system even though the ABS warning light, brake system warning light, TCS/DSC indicator light and DSC OFF indicator light are not illuminated

POSSIBLE CAUSE

• Mechanical malfunction in system.

STEP

INSPECTION

ACTION

1

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

  (See DTC INSPECTION [DSC HU/CM].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC INSPECTION [DSC HU/CM].)

No

Go to the next step.

2

• Switch the ignition off.

• Connect the M-MDS to the DLC-2.

• Switch the ignition ON (engine off).

• Access the active command mode for the solenoid valve and pump motor using the M-MDS.

  (See DTC INSPECTION [DSC HU/CM].)

• Do the solenoid valve and pump motor operate?

Yes

Inspect the conventional brake system.

If there is a malfunction:

• Repair or replace any malfunctioning parts according to the inspection result.

No

Repair or replace any malfunctioning parts according to the inspection result.