DTC U0338:00/U0515:00 [DYNAMIC STABILITY CONTROL (DSC)]

id0402b2861000

DTC
U0338:00, U0515:00
Abnormal signal from cruise control switch
DETECTION CONDITION
•  The DSC HU/CM received error signals from the cruise control switch with the ignition switched ON (engine off or on).
FAIL-SAFE FUNCTION
•  Does not illuminate each warning/indicator light (Mazda Radar Cruise Control (MRCC) warning light flashes).
•  Inhibits the Mazda Radar Cruise Control (MRCC) control.
POSSIBLE CAUSE
•  Cruise control switch malfunction
•  PCM malfunction
SYSTEM WIRING DIAGRAM
Not applicable

Diagnostic procedure

STEP

INSPECTION

ACTION
1
INSPECT CRUISE CONTROL SWITCH
•  Inspect the cruise control switch.
•  Is the cruise control normal?
Yes
Go to the next step.
No
Replace the cruise control switch, then go to the next step.
(See CRUISE CONTROL SWITCH REMOVAL/INSTALLATION [MAZDA RADAR CRUISE CONTROL (MRCC) SYSTEM].)
2
PERFORM PCM DTC INSPECTION
•  Switch the ignition to off.
•  Verify DTCs for the PCM using the M-MDS.
•  Is the DTC displayed?
Yes
Go to applicable DTC inspection.
(See DTC TABLE [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See DTC TABLE [SKYACTIV-D 2.2].)
No
Go to the next step.
3
VERIFY THAT THE SAME DTC IS NOT PRESENT
•  Clear DTC for the DSC HU/CM using the M-MDS.
•  Are the same DTCs present?
Yes
Repeat the inspection from Step 1.
If the malfunction recurs, replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
No
Go to the next step.
4
VERIFY IF OTHER DTCs DISPLAYED
•  Are any other DTCs displayed?
Yes
Repair the malfunctioning part according to the applicable DTC troubleshooting.
(See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].)
No
DTC troubleshooting completed.