DTC C0020-11, C0020-12, C0020-13, C0020-49, C0020-71: SIGNAL DOES NOT CORRESPOND TO DSC HU/Control Module OFF SIGNAL [DSC HU/Control Module]: Notes

DTC	C0020:11, C0020:12, C0020:13, C0020:49, C0020:71	Pump motor, motor relay
DETECTION CONDITION		C0020:11 Motor relay signal does not correspond to DSC HU/Control Module OFF signal. C0020:12, C0020:49 DSC motor monitor signal does not correspond to DSC HU/Control Module OFF signal. DSC motor monitor signal does not correspond to DSC HU/Control Module ON signal. C0020:13 Motor relay signal does not correspond to DSC HU/Control Module ON signal. C0020:71 DSC HU/Control Module motor monitor ON signal is not input within specified time limit or more when motor signal is switched from ON to OFF by DSC HU/Control Module.
FAIL-SAFE FUNCTION		Refer to "DTC Table" and "Fail-safe Function Malfunction Contents". (See DTC TABLE [DSC HU/Control Module] .)
POSSIBLE CAUSE		Fuse (ABS/DSC M 50A) malfunction Open or short circuit in DSC HU/Control Module internal motor relay, or stuck motor relay Open or short circuit in DSC HU/Control Module internal pump motor, or frozen pump motor Open circuit or short to ground in the wiring harness between the battery and DSC HU/Control Module terminal B Open circuit in the wiring harness between DSC HU/Control Module terminal AL and body ground Poor connection at connectors (female terminal)
Courtesy of MAZDA MOTORS CORP.