DTC

U3000:4A

DSC unit mismatched installation

DETECTION CONDITION

• Detection of situation where vehicle-type input signal and DSC HU/CM information remains incongruent through CAN information

FAIL-SAFE FUNCTION

• Illuminates the ABS warning light, TCS/DSC indicator light, and master warning light*¹.

• Tire pressure monitoring system warning light illuminates after flashes.

• Inhibits the ABS, brake assist, TCS, Hill Launch Assist (HLA), vehicle roll prevention function*², DSC, Mazda Radar Cruise Control (MRCC)*², Smart City Brake Support (SCBS)*², and TPMS controls.

*¹: Vehicles with Smart City Brake Support (SCBS).

*²: If equipped.

POSSIBLE CAUSE

• Mismatched installation of DSC HU/CM

• Instrument cluster configured improperly.

SYSTEM WIRING DIAGRAM

Not applicable

STEP

INSPECTION

ACTION

1

• Verify DSC HU/CM part number.

• Has a DSC HU/CM with the correct part number been installed?

Yes

Go to the next step.

No

Replace with correct DSC HU/CM part number, then go to Step 3.

(See DSC HU/CM REMOVAL/INSTALLATION.)

2

• Does instrument cluster configure properly?

Yes

Go to the next step.

No

Configure instrument cluster properly, then go to Step 3.

(See INSTRUMENT CLUSTER CONFIGURATION (USING READ/WRITE FUNCTION).) (See INSTRUMENT CLUSTER CONFIGURATION (USING AS-BUILT DATA).)

3

• Always reconnected all disconnect connectors.

• Clear DTC from memory.

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

• Is the same DTC present?

Yes

Replace DSC HU/CM, then go to next step.

(See DSC HU/CM REMOVAL/INSTALLATION.)

No

Go to the next step.

5

• Are any other DTCs output?

Yes

Go to the applicable DTC inspection.

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

No

DTC troubleshooting completed.