DTC

U0428:62

DSC HU/CM cannot determine the steering angle neutral position

DETECTION CONDITION

• While the vehicle is driven at 20 km/h or faster, the DSC HU/CM cannot determine the steering angle neutral position for 2 min or more.

NOTE:

• Each time the ignition is switched ON, the DSC HU/CM calculates the steering angle neutral position based on the signals from each sensor and each module.

• If the vehicle is driven as follows just after the engine is started, DTC U0428:62 may be output.

• Vehicle is accelerated rapidly while being steered right or left

• Vehicle is driven on abnormal road surface such as banked road

• Vehicle is driven on continuously curved road such as mountain road

• If the DTC is a past malfunction during DTC inspection, it does not indicate a vehicle malfunction.

FAIL-SAFE FUNCTION

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

• Inhibits the TCS, DSC, Mazda Radar Cruise Control (MRCC)^*2, and smart city brake support (SCBS)^*2 controls.

NOTE:

• If the DSC HU/CM determines the steering angle neutral position after DTC U0428:62 is detected, the TCS/DSC indicator light and master warning light^*1 are turned off.

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

*²: If equipped.

POSSIBLE CAUSE

• Vehicle is driven just after engine is started (in this case, vehicle is not malfunctioning)

• Vehicle is accelerated rapidly while being steered right or left

• Vehicle is driven on abnormal road surface such as banked road

• Vehicle is driven on continuously curved road such as mountain road

• Each sensor, module signal error caused by rough-road driving

• Poor connection at connectors (female terminal)

SYSTEM WIRING DIAGRAM

Not applicable

Step

Inspection

Action

1

• Switch the ignition ON (engine off or on).

• Are the TCS/DSC indicator light and the master warning light^*1 illuminated?

Yes

Perform DTC inspection and go to the applicable DTC troubleshooting procedure.

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

After completing the applicable DTC troubleshooting, go to the next step.

No

Clear the DTC from the memory and go to the next step.

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

2

• Are any other DTCs output?

Yes

Go to the applicable DTC troubleshooting procedure.

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

No

DTC troubleshooting completed.