DTC C0031:01/C0031:13/C0034:01/C0034:13/C0037:01/C0037:13/C003A:01/C003A:13 [DYNAMIC STABILITY CONTROL (DSC)]

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2014 - Mazda6 - Brakes

DTC C0031:01/C0031:13/C0034:01/C0034:13/C0037:01/C0037:13/C003A:01/C003A:13 [DYNAMIC STABILITY CONTROL (DSC)]

DTC	C0031:01/C0031:13		LF ABS wheel-speed sensor
	C0034:01/C0034:13		RF ABS wheel-speed sensor
	C0037:01/C0037:13		LR ABS wheel-speed sensor
	C003A:01/C003A:13		RR ABS wheel-speed sensor
DETECTION CONDITION		C0031:01/C0034:01/C0037:01/C003A:01 Short to ground has been detected in the ABS wheel-speed sensor wiring harness on any of the four vehicle wheels. C0031:13/C0034:13/C0037:13/C003A:13 Open circuit has been detected in the ABS wheel-speed sensor wiring harness on any of the four vehicle wheels.
FAIL-SAFE FUNCTION		Illuminates the ABS warning light, TCS/DSC indicator light, and master warning light¹. Tire pressure monitoring system warning light illuminates after flashes. Inhibits the ABS, brake assist control, TCS, Hill Launch Assist (HLA), vehicle roll prevention function², DSC, Mazda Radar Cruise Control (MRCC)², Smart City Brake Support (SCBS)², and TPMS controls (Additionally, when any malfunction is detected in one or two rear wheels, EBD control is inhibited and the brake system warning light is illuminated.). ¹: Vehicles with Smart City Brake Support (SCBS). ²: If equipped.
POSSIBLE CAUSE		Open circuit or short to ground in the wiring harness between the following DSC HU/CM terminals and ABS wheel-speed sensor terminals: DSC HU/CM terminal R—RF ABS wheel-speed sensor terminal B DSC HU/CM terminal O—RF ABS wheel-speed sensor terminal A DSC HU/CM terminal S—LF ABS wheel-speed sensor terminal B DSC HU/CM terminal P—LF ABS wheel-speed sensor terminal A DSC HU/CM terminal M—RR ABS wheel-speed sensor terminal B DSC HU/CM terminal J—RR ABS wheel-speed sensor terminal A DSC HU/CM terminal L—LR ABS wheel-speed sensor terminal B DSC HU/CM terminal I—LR ABS wheel-speed sensor terminal A Malfunction in the ABS wheel-speed sensor Poor connection at connectors (female terminal)

Diagnostic procedure


STEP	INSPECTION		ACTION
1	INSPECT ABS WHEEL-SPEED SENSOR FOR SHORT TO GROUND Switch the ignition off. Disconnect the DSC HU/CM connector. Inspect for continuity between the following DSC HU/CM connector terminals (vehicle harness-side) and body ground: RF ABS wheel-speed sensor(+): R RF ABS wheel-speed sensor(-): O LF ABS wheel-speed sensor(+): S LF ABS wheel-speed sensor(-): P RR ABS wheel-speed sensor(+): M RR ABS wheel-speed sensor(-): J LR ABS wheel-speed sensor(+): L LR ABS wheel-speed sensor(-): I Is there continuity?	Yes	Go to the next step.
1		No	Go to Step 3.
2	INSPECT ABS WHEEL-SPEED SENSOR WIRING HARNESS FOR SHORT TO GROUND Disconnect the ABS wheel-speed sensor connectors. Inspect for continuity between the following DSC HU/CM connector terminals (vehicle harness-side) and body ground: RF ABS wheel-speed sensor(+): R RF ABS wheel-speed sensor(-): O LF ABS wheel-speed sensor(+): S LF ABS wheel-speed sensor(-): P RR ABS wheel-speed sensor(+): M RR ABS wheel-speed sensor(-): J LR ABS wheel-speed sensor(+): L LR ABS wheel-speed sensor(-): I Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between the DSC HU/CM connector terminals (vehicle harness-side) and the following vehicle harness-side connector terminals of the ABS wheel-speed sensors: RF ABS wheel-speed sensor(+): R—B RF ABS wheel-speed sensor(-): O—A LF ABS wheel-speed sensor(+): S—B LF ABS wheel-speed sensor(-): P—A RR ABS wheel-speed sensor(+): M—B RR ABS wheel-speed sensor(-): J—A LR ABS wheel-speed sensor(+): L—B LR ABS wheel-speed sensor(-): I—A If there is a common connector: Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has a short to ground. Go to Step 5.
2		No	Replace the ABS wheel-speed sensor, then go to Step 5. (See FRONT ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION.) (See REAR ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION.)
3	INSPECT FOR OPEN CIRCUIT IN ABS WHEEL-SPEED SENSOR WIRING HARNESS Inspect for continuity between the DSC HU/CM connector terminals (vehicle harness-side) and the following vehicle harness-side connector terminals of the ABS wheel-speed sensors: RF ABS wheel-speed sensor(+): R—B RF ABS wheel-speed sensor(-): O—A LF ABS wheel-speed sensor(+): S—B LF ABS wheel-speed sensor(-): P—A RR ABS wheel-speed sensor(+): M—B RR ABS wheel-speed sensor(-): J—A LR ABS wheel-speed sensor(+): L—B LR ABS wheel-speed sensor(-): I—A Is there continuity?	Yes	Go to the next step.
3		No	Refer to the wiring diagram and verify whether or not there is a common connector between the DSC HU/CM connector terminals (vehicle harness-side) and the following vehicle harness-side connector terminals of the ABS wheel-speed sensors: RF ABS wheel-speed sensor(+): R—B RF ABS wheel-speed sensor(-): O—A LF ABS wheel-speed sensor(+): S—B LF ABS wheel-speed sensor(-): P—A RR ABS wheel-speed sensor(+): M—B RR ABS wheel-speed sensor(-): J—A LR ABS wheel-speed sensor(+): L—B LR ABS wheel-speed sensor(-): I—A If there is a common connector: Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has an open circuit. Go to the Step 5.
4	INSPECT ABS WHEEL-SPEED SENSOR WIRING HARNESS FOR SHORT TO POWER SUPPLY Inspect for voltage between the following DSC HU/CM connector terminals (vehicle harness-side) and body ground: RF ABS wheel-speed sensor(+): R RF ABS wheel-speed sensor(-): O LF ABS wheel-speed sensor(+): S LF ABS wheel-speed sensor(-): P RR ABS wheel-speed sensor(+): M RR ABS wheel-speed sensor(-): J LR ABS wheel-speed sensor(+): L LR ABS wheel-speed sensor(-): I Is the voltage 1 V or less?	Yes	Go to the next step.
4		No	Refer to the wiring diagram and verify whether or not there is a common connector between the DSC HU/CM connector terminals (vehicle harness-side) and the following vehicle harness-side connector terminals of the ABS wheel-speed sensors: RF ABS wheel-speed sensor(+): R—B RF ABS wheel-speed sensor(-): O—A LF ABS wheel-speed sensor(+): S—B LF ABS wheel-speed sensor(-): P—A RR ABS wheel-speed sensor(+): M—B RR ABS wheel-speed sensor(-): J—A LR ABS wheel-speed sensor(+): L—B LR ABS wheel-speed sensor(-): I—A If there is a common connector: Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has a short to power supply. Go to the next step.
5	VERIFY THAT THE SAME DTC IS NOT PRESENT Reconnect all disconnected connectors. Clear the DTCs from the memory. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].) Are the same DTCs present?	Yes	Repeat the inspection from Step 1. If the malfunction recurs, replace the DSC HU/CM, then go to the next step. (See DSC HU/CM REMOVAL/INSTALLATION.)
5		No	Go to the next step.
6	VERIFY THAT NO OTHER DTCs ARE PRESENT Are any other DTCs output?	Yes	Go to the applicable DTC inspection. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].)
6		No	DTC troubleshooting completed.

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