DTC C1139-64: AUTOHOLD Switch [DSC HU/Cm]: Outline
WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.
| System malfunction location |
AUTOHOLD switch |
| Detection condition |
- The DSC HU/CM detects that the AUTOHOLD switch via CAN communication is on (stuck on) for 30 s or more.
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| Fail-safe |
Refer to "DTC Table" and "Fail-safe Function Malfunction Contents Table". (See DTC TABLE [DSC HU/CM (US)] .) |
| Possible cause |
CAUTION:
- When the AUTOHOLD switch is continuously pressed down for a long period, DTCs may be detected. Therefore, always verify that DTCs being detected are due to how the customer has operated the switch.
- Electric parking brake switch connector or terminal malfunction
- Electric parking brake switch malfunction
- AUTOHOLD switch malfunction
- Short to ground in AUTOHOLD switch signal circuit
- Electrical supply unit (ESU) malfunction
- DSC HU/CM malfunction
|
 Courtesy of MAZDA MOTORS CORP.
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