DTC U0402; Abnormal Message From Transmission/Transaxle: Notes
WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
DETECTION CONDITION & POSSIBLE CAUSE
| DTC |
U0402:00 |
Abnormal message from transmission/transaxle |
| DETECTION CONDITION |
- The DSC HU/CM received error signals from the transmission/transaxle for 1 s or more with the ignition switched ON (engine off or on).
|
| FAIL-SAFE FUNCTION |
- Illuminates the TCS/DSC indicator light and smart city brake support (SCBS) indicator light (amber) *1
.
- Tire pressure monitoring system warning light *1
illuminates after flashes.
- Inhibits the TCS, DSC, hill launch assist (HLA), TPMS *1
, and smart city brake support (SCBS) *1
controls.
*1
: If equipped. |
| POSSIBLE CAUSE |
- The transmission/transaxle could not send a normal signal temporarily. (DTCs are stored in the TCM.)
- TCM malfunction
|
| SYSTEM WIRING DIAGRAM |
Not applicable |