DTC U0423:00/U0443:00 [DYNAMIC STABILITY CONTROL (DSC)]

id0402b2905300

DTC
U0423:00/U0443:00
Abnormal message from instrument cluster
DETECTION CONDITION
•  Correct data cannot be received from instrument cluster
FAIL-SAFE FUNCTION
•  U0423:00
―  Illuminates the Smart Brake Support/Smart City Brake Support (SBS/SCBS) indicator light (amber)*1.
―  Tire pressure monitoring system warning light*1 illuminates after flashes.
―  Inhibits the TPMS*1, Smart Brake Support (SBS)*1, and Smart City Brake Support (SCBS)*1 controls.
•  U0443:00
―  Illuminates the Mazda Radar Cruise Control (MRCC) warning light*1, and Smart Brake Support/Smart City Brake Support (SBS/SCBS) indicator light (amber)*1.
―  Inhibits the Mazda Radar Cruise Control (MRCC)*1 and Smart City Brake Support (SCBS)*1 controls.
*: If equipped.
POSSIBLE CAUSE
•  Instrument cluster malfunction
SYSTEM WIRING DIAGRAM
Not applicable

Diagnostic procedure

STEP

INSPECTION

ACTION
1
INSPECT FOR INSTRUMENT CLUSTER MALFUNCTION
•  Switch the ignition to off.
•  Using the M-MDS, perform the DTC inspection for the instrument cluster.
•  Are any DTCs detected?
Yes
Go to applicable DTC inspection.
(See DTC TABLE [INSTRUMENT CLUSTER].)
No
Go to the next step.
2
VERIFY THAT THE SAME DTC IS NOT PRESENT
•  Clear the DTCs from the memory.
•  Are the same DTCs present?
Yes
Repeat the inspection from Step 1.
If the malfunction recurs, replace the instrument cluster, then go to the next step.
(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
No
Go to the next step.
3
VERIFY THAT NO OTHER DTCS ARE PRESENT
•  Are any other DTCs output?
Yes
Go to the applicable DTC inspection.
(See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].)
No
DTC troubleshooting completed.