DTC C1139-64: AUTO HOLD SWITCH [DSC HU/Control Module]: Notes

WARNING: This page is about a different car, the 2021 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.

DTC	C1139:64	AUTO HOLD switch
DETECTION CONDITION		Continuous ON signal from the AUTO HOLD switch for 30 s or more is detected.
FAIL-SAFE FUNCTION		Refer to "DTC Table" and "Fail-safe Function Malfunction Contents". (See DTC TABLE [DSC HU/Control Module] .)
POSSIBLE CAUSE		CAUTION: When the AUTO HOLD 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. Short to ground in the wiring harness between the electric parking brake control module terminal 2D and AUTO HOLD switch terminal D AUTO HOLD switch malfunction AUTO HOLD switch is mechanically stuck Electric parking brake control module malfunction
SYSTEM WIRING DIAGRAM		Not applicable