DTC C1A77 12/C1A77 13/C1A77 16: Valve Relay: Notes
WARNING: This page is about a different car, the 2014 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
DTC C1A77:12/C1A77:13/C1A77:16 (DYNAMIC STABILITY CONTROL) DETECTION CONDITION AND POSSIBLE CAUSE
| DTC |
C1A77:12/C1A77:13/C1A77:16 |
Valve relay |
| DETECTION CONDITION |
- C1A77:12
- Valve relay in DSC HU/CM stuck ON when the ignition is switched ON, valve relay OFF is commanded.
- C1A77:13/C1A77:16
- Valve relay in DSC HU/CM stuck OFF when valve relay ON is commanded.
|
| FAIL-SAFE FUNCTION |
- Illuminates the ABS warning light, brake system warning light, TCS/DSC indicator light, and master warning light*1
.
- Inhibits the ABS, EBD, brake assist, TCS, Hill Launch Assist (HLA), vehicle roll prevention function*2
, DSC, Mazda Radar Cruise Control (MFSCC)*2
, and Smart City Brake Support (SCBS)*2
controls.
*1
: Vehicles with Smart City Brake Support (SCBS).
*2
: If equipped. |
| POSSIBLE CAUSE |
- Malfunction of fuse (ABS/DSC S 30A)
- Open circuit in harness between DSC HU/CM terminal AG and battery positive terminal
- Open circuit or short of valve relay in DSC HU/CM
- Stuck valve relay in DSC HU/CM
|
 Courtesy of MAZDA MOTORS CORP.
|