DTC C0031:23/C0031:27/C0031:62/C0034:23/C0034:27/C0034:62/C0037:23/C0037:27/C0037:62/C003A:23/C003A:27/C003A:62 [ABS]

id0402a7879800

Note

• When only the driving wheels are rotated while the vehicle is jacked up, DTCs C0037:23 and C003A:23 are input to the memory.

DTC

C0031:23/C0031:27/C0031:62

LF ABS wheel-speed sensor/ABS sensor rotor

C0034:23/C0034:27/C0034:62

RF ABS wheel-speed sensor/ABS sensor rotor

C0037:23/C0037:27/C0037:62

LR ABS wheel-speed sensor/ABS sensor rotor

C003A:23/C003A:27/C003A:62

RR ABS wheel-speed sensor/ABS sensor rotor

DETECTION CONDITION

•  C0031:23/C0031:62/C0034:23/C0034:62/C0037:23/C0037:62/C003A:23/C003A:62

―  Abnormal sensor output is detected on any of four vehicle ABS wheels when the vehicle goes from start to a speed of 10 km/h {6.2 mph}

―  Greater than specified amount of ABS demand occurs from front ABS wheel sensors when vehicle is started

―  The following condition is detected 8 times continuously (One detection period is when ignition is switched from ON to off)

•  While the vehicle is traveling at a speed of 20 km/h {12 mph} or more, the wheel speed signal from the rear wheels is not input to the ABS HU/CM for a continuous 20 s.

•  C0031:27/C0034:27/C0037:27/C003A:27

―  Periodic abnormality is detected in the signal wave pattern from the ABS wheel-speed sensors.

―  ABS control continues to operate for 45 s or more.

POSSIBLE CAUSE

•  Malfunction of ABS wheel-speed sensor (s)

•  Damaged sensor rotor (s)

•  Incorrect clearance between ABS wheel-speed sensor and sensor rotor

•  Poor installation of ABS wheel speed sensor and/or sensor rotor (If the sensor rotor is installed twisted, it may cause output of abnormal wave form at high speeds)

•  ABS HU/CM internal damage (Solenoid valve malfunction, pump motor malfunction, or pipe clogging)

Diagnostic procedure

STEP	INSPECTION		ACTION
1	INSPECT PID FOR ABS WHEEL-SPEED SENSOR OUTPUT ERROR USING M-MDS • Switch the ignition to off. • Connect the M-MDS to the DLC-2. • Select the following PIDs using the M-MDS: ― WSPD_LF ― WSPD_LR ― WSPD_RF ― WSPD_RR • Drive the vehicle. • Verify that the vehicle speeds detected by the four ABS wheel-speed sensors are approximately the same. • Are the vehicle speeds approximately the same?	Yes	Go to Step 3.
1		No	Go to the next step.
2	INSPECT FOR SHORT TO GROUND BETWEEN ABS WHEEL-SPEED SENSOR CONNECTORS AND GROUND • Disconnect the ABS wheel-speed sensor connectors. • Inspect for no continuity between the following ABS wheel-speed sensor connector terminals (vehicle harness-side) and body ground: ― ABS wheel-speed sensor (RF): A—Body ground ― ABS wheel-speed sensor (LF): A—Body ground ― ABS wheel-speed sensor (RR): A—Body ground ― ABS wheel-speed sensor (LR): A—Body ground • Is the continuity normal?	Yes	Go to the next step.
2		No	Repair or replace the wiring harness, then go to step 5.
3	INSPECT IF MALFUNCTION OCCURRED DUE TO IMPROPER SENSOR CLEARANCE. • Inspect the clearance between the ABS wheel-speed sensor and the ABS sensor rotor. (See FRONT ABS WHEEL-SPEED SENSOR INSPECTION.) (See REAR ABS WHEEL-SPEED SENSOR INSPECTION.) • Is the clearance normal?	Yes	Go to the next step.
3		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.)
4	VISUALLY INSPECT ABS SENSOR ROTOR FOR FOREIGN MATERIAL ADHERING OR IMPROPER INSTALLATION • Is the result normal?	Yes	Go to the next step.
4		No	Replace the wheel hub component, then go to next step. (See WHEEL HUB, STEERING KNUCKLE REMOVAL/INSTALLATION.) (See WHEEL HUB COMPONENT REMOVAL/INSTALLATION.)
5	VERIFY THAT THE SAME DTC IS NOT PRESENT • Reconnect all disconnected connectors. • Clear the DTCs from the memory. (See ON-BOARD DIAGNOSIS [ABS].) • Start the engine and drive the vehicle at 10 km/h {6.2 mph} or more. • Are the same DTCs present?	Yes	Repeat the inspection from Step 1. If the malfunction recurs, replace the ABS HU/CM, then go to the next step. (See ABS 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 [ABS].)
6		No	DTC troubleshooting completed.

DTC	C0031:23/C0031:27/C0031:62		LF ABS wheel-speed sensor/ABS sensor rotor
	C0034:23/C0034:27/C0034:62		RF ABS wheel-speed sensor/ABS sensor rotor
	C0037:23/C0037:27/C0037:62		LR ABS wheel-speed sensor/ABS sensor rotor
	C003A:23/C003A:27/C003A:62		RR ABS wheel-speed sensor/ABS sensor rotor
DETECTION CONDITION		• C0031:23/C0031:62/C0034:23/C0034:62/C0037:23/C0037:62/C003A:23/C003A:62 ― Abnormal sensor output is detected on any of four vehicle ABS wheels when the vehicle goes from start to a speed of 10 km/h {6.2 mph} ― Greater than specified amount of ABS demand occurs from front ABS wheel sensors when vehicle is started ― The following condition is detected 8 times continuously (One detection period is when ignition is switched from ON to off) • While the vehicle is traveling at a speed of 20 km/h {12 mph} or more, the wheel speed signal from the rear wheels is not input to the ABS HU/CM for a continuous 20 s. • C0031:27/C0034:27/C0037:27/C003A:27 ― Periodic abnormality is detected in the signal wave pattern from the ABS wheel-speed sensors. ― ABS control continues to operate for 45 s or more.
POSSIBLE CAUSE		• Malfunction of ABS wheel-speed sensor (s) • Damaged sensor rotor (s) • Incorrect clearance between ABS wheel-speed sensor and sensor rotor • Poor installation of ABS wheel speed sensor and/or sensor rotor (If the sensor rotor is installed twisted, it may cause output of abnormal wave form at high speeds) • ABS HU/CM internal damage (Solenoid valve malfunction, pump motor malfunction, or pipe clogging)