DTC

U0305:00, U0405:00

Abnormal message from Vehicle Control Module (V/C-Module)

DETECTION CONDITION

• Correct data cannot be received from Vehicle Control Module (V/C-Module)

FAIL-SAFE FUNCTION

• Does not illuminate any indicator/warning lights.

• Inhibits the Mazda Radar Cruise Control (MRCC).

POSSIBLE CAUSE

• Vehicle Control Module (V/C-Module) malfunction

SYSTEM WIRING DIAGRAM

Not applicable

STEP

INSPECTION

ACTION

1

• Switch the ignition off.

• Using the M-MDS, perform the DTC inspection for the Vehicle Control Module (V/C-Module).

  (See DTC INSPECTION [VEHICLE CONTROL MODULE (V/C-MODULE)].)

• Are any DTCs detected?

Yes

Go to applicable DTC inspection.

(See DTC TABLE [VEHICLE CONTROL MODULE (V/C-MODULE)].)

No

Go to the next step.

2

• Clear the DTCs from the memory.

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

• Are the same DTCs present?

Yes

Repeat the inspection from Step 1.

If the malfunction recurs, replace the Vehicle Control Module (V/C-Module), then go to the next step.

(See VEHICLE CONTROL MODULE (V/C-MODULE) REMOVAL/INSTALLATION [MAZDA RADAR CRUISE CONTROL (MRCC) SYSTEM].)

No

Go to the next step.

3

• Are any other DTCs output?

Yes

Go to the applicable DTC inspection.

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

No

DTC troubleshooting completed.