DTC: C0031-14, C0034-14, C0037-14, C003A-14

DTC C0031-14  : Left Front Wheel Speed Sensor Circuit Failure (Circuit Short To Ground or Open)

DTC C0034-14  : Right-Front Wheel Speed Sensor Circuit Failure (Circuit Short To Ground or Open)

DTC C0037-14  : Left Rear Wheel Speed Sensor Circuit Failure (Circuit Short To Ground or Open)

DTC C003A-14  : Right Rear Wheel Speed Sensor Circuit Failure (Circuit Short To Ground or Open)

NOTE: Before You Troubleshoot, Review The General Troubleshooting Information .

DTCs (VSA)

1. Problem verification

   -1. Turn the vehicle to the ON mode.

   - 2. Clear the DTC with the HDS.

   - 3. Turn the vehicle to the OFF (LOCK) mode.

   - 4. Test-drive the vehicle on the road in a straight line at 19 mph (30km/h) or more.

   NOTE:  Drive the vehicle on the road, not on a lift.

   - 5. Check for DTCs with the HDS.

   DTC Description	DTC	Freeze Frame
   C0031-14 Left Front Wheel Speed Sensor Circuit Failure (Circuit Short To Ground or Open)
   C0034-14 Right-Front Wheel Speed Sensor Circuit Failure (Circuit Short To Ground or Open)
   C0037-14 Left Rear Wheel Speed Sensor Circuit Failure (Circuit Short To Ground or Open)
   C003A-14 Right Rear Wheel Speed Sensor Circuit Failure (Circuit Short To Ground or Open)

   Is DTC C0031-14, C0034-14, C0037-14, or C003A-14 indicated?

   YES 

   The failure is duplicated. Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. Refer To Intermittent Failures Troubleshooting . If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the Freeze data/on-board snapshot.

2. Shorted wire check (Wheel speed sensor lines to ground)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   - 2. Disconnect the following connector.

   VSA modulator-control unit 38P connector

   - 3. Check for continuity between body ground and the appropriate wheel speed sensors B and GND terminals of the VSA modulator-control unit 38P connector individually (see table).

   Test condition	Vehicle OFF (LOCK) mode
   	VSA modulator-control unit 38P connector: disconnected

   DTC	VSA modulator-control unit 38P connector - Refer to: VSA Modulator-Control Unit Connector for Inputs and Outputs (2016 2017 2018) or VSA Modulator-Control Unit Connector for Inputs and Outputs (2019 2020 2021) .
   	+B	GND
   C0031-14 Left-front	No. 28	No. 27
   C0034-14 Right-form	No. 37	No. 38
   C0037-14 Left-rear	No. 35	No. 34
   C003A-14 Right-rear	No. 30	No. 31

   Is there continuity?

   YES 

   Wheel speed sensor wires are shorted to body ground. Go to step 3.

   NO 

   Wheel speed sensor wires are not shorted to body ground. Go to step 4.

3. Wheel speed sensor(s) check 1

   -1. Disconnect the following connector.

   Appropriate wheel speed sensor 2P connector

   - 2. On the sensor side, check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	VSA modulator-control unit 38P connector: disconnected
   	Appropriate wheel speed sensor 2P connector: disconnected
   Test circuit 1
   Test point 1	Appropriate wheel speed sensor 2P connector No. 1
   Test point 2	Body ground

   Test circuit 2
   Test point 1	Appropriate wheel speed sensor 2P connector No. 2
   Test point 2	Body ground

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   The harness side of the wheel speed sensor wires are not shorted to body ground. Replace The Appropriate Wheel Speed Sensor .

   NO 

   Repair a short to body ground in the wire between the VSA modulator-control unit and the wheel speed sensor.

4. Shorted wire check (Wheel speed sensor lines to power)

   -1. Turn the vehicle to the ON mode.

   - 2. Measure the voltage between body ground and the appropriate wheel speed sensors B and GND terminals of the VSA modulator-control unit 38P connector individually (see table).

   Test condition	Vehicle ON mode
   	VSA modulator-control unit 38P connector: disconnected

   DTC	VSA modulator-control unit 38P connector - Refer to: VSA Modulator-Control Unit Connector for Inputs and Outputs (2016 2017 2018) or VSA Modulator-Control Unit Connector for Inputs and Outputs (2019 2020 2021)
   	+B	GND
   C0031-14 Left-front	No. 28	No. 27
   C0034-14 Right-form	No. 37	No. 38
   C0037-14 Left-rear	No. 35	No. 34
   C003A-14 Right-rear	No. 30	No. 31

   Is there 0.1 V or more?

   YES 

   The wheel speed sensor wires are shorted to power. Go to step 5.

   NO 

   The wheel speed sensor wires are not shorted to power. Go to step 6.

5. Wheel speed sensor(s) check 2

   -1. Turn the vehicle to the OFF (LOCK) mode.

   - 2. Disconnect the following connector.

   Appropriate wheel speed sensor 2P connector

   - 3. Turn the vehicle to the ON mode.

   - 4. On the sensor side, measure the voltage between test points 1 and 2.

   Test condition	Vehicle ON mode
   	VSA modulator-control unit 38P connector: disconnected

   	Appropriate wheel speed sensor 2P connector: disconnected
   Test circuit 1
   Test point 1	Appropriate wheel speed sensor 2P connector No. 1
   Test point 2	Body ground

   Test circuit 2
   Test point 1	Appropriate wheel speed sensor 2P connector No. 2
   Test point 2	Body ground

   Courtesy of HONDA, U.S.A., INC.

   Is there 1 V or more?

   YES 

   The harness side of the wheel speed sensor wires are not shorted to power. Replace The Appropriate Wheel Speed Sensor .

   NO 

   Repair a short to power in the wire between the VSA modulator-control unit and the appropriate wheel speed sensor.

6. Shorted wire check (Wheel speed sensor lines wire to wire)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   - 2. Disconnect the following connector.

   Appropriate wheel speed sensor 2P connector

   - 3. Check for continuity between the appropriate VSA modulator-control unit 38P connector wheel speed sensors B and GND terminals (see table).

   Test condition	Vehicle OFF (LOCK) mode
   	VSA modulator-control unit 38P connector: disconnected
   	Appropriate wheel speed sensor 2P connector: disconnected

   DTC	VSA modulator-control unit 38P connector - Refer to: VSA Modulator-Control Unit Connector for Inputs and Outputs (2019 2020 2021) or VSA Modulator-Control Unit Connector for Inputs and Outputs (2016 2017 2018) .
   	+B	GND
   C0031-14 Left-front	No. 28	No. 27
   C0034-14 Right-form	No. 37	No. 38
   C0037-14 Left-rear	No. 35	No. 34
   C003A-14 Right-rear	No. 30	No. 31

   Is there continuity?

   YES 

   Repair a short in the wires between the appropriate wheel speed sensor and the VSA modulator-control unit.

   NO 

   The wheel speed sensor wires are not shorted in the wires. Go to step 7.

7. Open wire check (Wheel speed sensor lines) 1

   -1. Check for continuity between the appropriate VSA modulator-control unit 38P connector terminal and the appropriate wheel speed sensor 2P connector terminal (see table).

   Test condition	Vehicle OFF (LOCK) mode
   	VSA modulator-control unit 38P connector: disconnected
   	Appropriate wheel speed sensor 2P connector: disconnected

   DTC	VSA Modulator-Control Unit 38P Connector Terminal - Refer to: VSA Modulator-Control Unit Connector for Inputs and Outputs (2016 2017 2018) or VSA Modulator-Control Unit Connector for Inputs and Outputs (2019 2020 2021) .	Appropriate Wheel Speed Sensor 2P Connector Terminal
   C0031-14	No. 28	Left-front wheel speed Sensor 2P connector No. 1
   C0034-14	No. 37	Right-front wheel speed Sensor 2P connector No. 1
   C0037-14	No. 35	Left-rear wheel speed Sensor 2P connector No. 1
   C003A-14	No. 30	Right-rear wheel speed Sensor 2P connector No. 1

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   Go to step 8.

   NO 

   Repair an open in the wire between the appropriate wheel speed sensor and the VSA modulator-control unit.

8. Open wire check (Wheel speed sensor lines) 2

   -1. Check for continuity between the appropriate VSA modulator-control unit 38P connector terminal and the appropriate wheel speed sensor 2P connector terminal (see table).

   Test condition	Vehicle OFF (LOCK) mode
   	VSA modulator-control unit 38P connector: disconnected
   	Appropriate wheel speed sensor 2P connector: disconnected

   DTC	VSA Modulator-Control Unit 38P Connector Terminal - Refer to: VSA Modulator-Control Unit Connector for Inputs and Outputs (2016 2017 2018) or VSA Modulator-Control Unit Connector for Inputs and Outputs (2019 2020 2021)	Appropriate Wheel Speed Sensor 2P Connector Terminal
   C0031-14	No. 27	Left-front wheel speed Sensor 2P connector No. 2
   C0034-14	No. 38	Right-front wheel speed Sensor 2P connector No. 2
   C0037-14	No. 34	Left-rear wheel speed Sensor 2P connector No. 2
   C003A-14	No. 31	Right-rear wheel speed Sensor 2P connector No. 2

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   The wheel speed sensor wires are OK. Go to step 9.

   NO 

   Repair an open in the wire between the appropriate wheel speed sensor and the VSA modulator-control unit.

9. Wheel speed sensor(s) check (substitution)

   -1. Substitute a known-good wheel speed sensor.

   DTC	Appropriate Wheel Speed Sensor
   C0031-14	Left-front
   C0034-14	Right-front
   C0037-14	Left-rear
   C003A-14	Right-rear

   - 2. Reconnect the following connectors.

   VSA modulator-control unit 38P connector

   Wheel speed sensor 2P connector

   - 3. Turn the vehicle to the ON mode.

   - 4. Clear the DTC with the HDS.

   - 5. Turn the vehicle to the OFF (LOCK) mode.

   - 6. Test-drive the vehicle on the road in a straight line at 19 mph (30km/h) or more.

   NOTE:  Drive the vehicle on the road, not on a lift.

   - 7. Check for DTCs with the HDS.

   DTC Description	DTC	Freeze Frame
   C0031-14 Left Front Wheel Speed Sensor Circuit Failure (Circuit Short To Ground or Open)
   C0034-14 Right-Front Wheel Speed Sensor Circuit Failure (Circuit Short To Ground or Open)
   C0037-14 Left Rear Wheel Speed Sensor Circuit Failure (Circuit Short To Ground or Open)

   DTC Description	DTC	Freeze Frame
   C003A-14 Right Rear Wheel Speed Sensor Circuit Failure (Circuit Short To Ground or Open)

   Is DTC C0031-14, C0034-14, C0037-14, or C003A-14 indicated?

   YES 

   Check for loose terminals and poor connections in the VSA modulator-control unit 38P connector. If they are OK, replace the VSA modulator-control unit. Refer to:

   Replace The VSA Modulator-Control Unit .

   NO 

   Replace The Original Wheel Speed Sensor .