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Home >> Honda >> 2021 >> Clarity Plug-In Hybrid >> Repair and Diagnosis >> Brakes >> Traction Control >> VSA System - Diagnostics (B0050 - P0BCC) (Plug-In) >> Troubleshooting >> DTC Troubleshooting: C0031-14, C0034-14, C0037-14, C003A-14

DTC Troubleshooting: 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 .

DTC Description DTC
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)  

DTC (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, then the READY TO DRIVE mode.

    -4. Check for DTCs with the HDS.

    DTC Description DTC
    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 .

  2. Shorted wire check (SNSR+, SNSR- lines to ground)

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

    -2. Disconnect the following connector.

    VSA modulator-control unit 46P connector

    -3. Check for continuity between body ground and the appropriate wheel speed sensor +B and GND terminals of the VSA modulator-control unit 46P connector individually (see table).

    Test condition Vehicle OFF (LOCK) mode
      VSA modulator-control unit 46P connector: disconnected
    DTC Connector Test point 1 Test point 2
    C0031-14Left-front VSA modulator-control unit 46P connector FR L ABS SNSR+ No. 33 Body ground
    FR L ABS SNSR- No. 42
    C0034-14Right-front FR R ABS SNSR+ No. 30
    FR R ABS SNSR- No. 35
    C0037-14Left-rear RR L ABS SNSR+ No. 17
    RR L ABS SNSR- No. 32
    C003A-14Right-rear RR R ABS SNSR+ No. 31
    RR R ABS SNSR- No. 15

    Is there continuity?

    YES 

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

    NO 

    The SNSR+ and the SNSR- wires are not shorted to body ground. Go to step 4.

  3. Wheel speed sensor(s) check 1

    -1. Disconnect the following connectors.

    Appropriate wheel speed sensor 2P connector (front)
    Appropriate wheel speed sensor 4P connector (rear)

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

    Test condition Vehicle OFF (LOCK) mode
      VSA modulator-control unit 46P connector: disconnected
      Appropriate wheel speed sensor 2P connector (front): disconnected
      Appropriate wheel speed sensor 4P connector (rear): disconnected
    Test circuit 1  
    Test point 1 Appropriate wheel speed sensor 2P connector (male terminals) No. 1:
      Appropriate wheel speed sensor 4P connector (male terminals) No. 3:
    Test point 2 Body ground
    Test circuit 2  
    Test point 1 Appropriate wheel speed sensor 2P connector (male terminals) No. 2:
      Appropriate wheel speed sensor 4P connector (male terminals) No. 4:
    Test point 2 Body ground
    GHH421511Courtesy of HONDA, U.S.A., INC.
    GHH421512Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    The SNSR+ and the SNSR- wires are not shorted to body ground. Replace the appropriate wheel speed sensor .

    NO 

    Repair a short to ground in the SNSR+ and/or the SNSR- wires between the VSA modulator-control unit and the wheel speed sensor.

  4. Shorted wire check (SNSR+, SNSR- lines to power)

    -1. Turn the vehicle to the ON mode.

    -2. Measure the voltage between body ground and the appropriate wheel speed sensor +B and GND terminals of the VSA modulator-control unit 46P connector individually (see table).

    Test condition Vehicle ON mode
      VSA modulator-control unit 46P connector: disconnected
    DTC Connector Test point 1 Test point 2
    C0031-14Left-front VSA modulator-control unit 46P connector FR L ABS SNSR+ No. 33 Body ground
    FR L ABS SNSR- No. 42
    C0034-14Right-front FR R ABS SNSR+ No. 30
    FR R ABS SNSR- No. 35
    C0037-14Left-rear RR L ABS SNSR+ No. 17
    RR L ABS SNSR- No. 32
    C003A-14Right-rear RR R ABS SNSR+ No. 31
    RR R ABS SNSR- No. 15

    Is there 1 V or more?

    YES 

    The SNSR+ and the SNSR- wires are shorted to power. Go to step 5.

    NO 

    The SNSR+ and the SNSR- 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 connectors.

    Appropriate wheel speed sensor 2P connector (front)
    Appropriate wheel speed sensor 4P connector (rear)

    -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 46P connector: disconnected
      Appropriate wheel speed sensor 2P connector (front): disconnected
      Appropriate wheel speed sensor 4P connector (rear): disconnected
    Test circuit 1  
    Test point 1 Appropriate wheel speed sensor 2P connector (male terminals) No. 1:
      Appropriate wheel speed sensor 4P connector (male terminals) No. 3:
    Test point 2 Body ground
    Test circuit 2  
    Test point 1 Appropriate wheel speed sensor 2P connector (male terminals) No. 2:
      Appropriate wheel speed sensor 4P connector (male terminals) No. 4:
    Test point 2 Body ground
    GHH421517Courtesy of HONDA, U.S.A., INC.
    GHH421518Courtesy of HONDA, U.S.A., INC.

    Is there 1 V or more?

    YES 

    The SNSR+ and the SNSR- wires are not shorted to power. Replace the appropriate wheel speed sensor .

    NO 

    Repair a short to power in the SNSR+ and/or the SNSR- wires between the VSA modulator-control unit and the appropriate wheel speed sensor.

  6. Shorted wire check (SNSR+, SNSR- lines wire to wire)

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

    -2. Disconnect the following connectors.

    Appropriate wheel speed sensor 2P connector (front)
    Appropriate wheel speed sensor 4P connector (rear)

    -3. Check for continuity between the appropriate VSA modulator-control unit 46P connector wheel speed sensor +B and GND terminals (see table).

    Test condition Vehicle OFF (LOCK) mode
      VSA modulator-control unit 46P connector: disconnected
      Appropriate wheel speed sensor 2P connector (front): disconnected
      Appropriate wheel speed sensor 4P connector (rear): disconnected
    DTC Connector Test point 1 Test point 2
    C0031-14Left-front VSA modulator-control unit 46P connector FR L ABS SNSR+ No. 33 Body ground
    FR L ABS SNSR- No. 42
    C0034-14Right-front FR R ABS SNSR+ No. 30
    FR R ABS SNSR- No. 35
    C0037-14Left-rear RR L ABS SNSR+ No. 17
    RR L ABS SNSR- No. 32
    C003A-14Right-rear RR R ABS SNSR+ No. 31
    RR R ABS SNSR- No. 15

    Is there continuity?

    YES 

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

    NO 

    The SNSR+ and the SNSR- wires are not shorted in the wires. Go to step 7.

  7. Open wire check (SNSR+ lines)

    -1. Check for continuity between the appropriate VSA modulator-control unit 46P connector terminal and the appropriate wheel speed sensor 2P connector (front) terminal or wheel speed sensor 4P connector (rear) terminal (see table).

    Test condition Vehicle OFF (LOCK) mode
      VSA modulator-control unit 46P connector: disconnected
      Appropriate wheel speed sensor 2P connector (front): disconnected
      Appropriate wheel speed sensor 4P connector (rear): disconnected
    DTC VSA modulator-control unit 46P connector Appropriate Wheel Speed Sensor Connector Terminal
    C0031-14Left-front No. 33 Left-front wheel speed sensor 2P connector (female terminals) No. 1:
    C0034-14Right-front No. 30 Right-front wheel speed sensor 2P connector (female terminals) No. 1:
    C0037-14Left-rear No. 17 Left-rear wheel speed sensor 4P connector (female terminals) No. 3:
    C003A-14Right-rear No. 31 Right-rear wheel speed sensor 4P connector (female terminals) No. 3:
    GHH421523Courtesy of HONDA, U.S.A., INC.
    GHH421524Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    The SNSR+ wires are OK. Go to step 8.

    NO 

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

  8. Open wire check (SNSR- lines)

    -1. Check for continuity between the appropriate VSA modulator-control unit 46P connector terminal and the appropriate wheel speed sensor 2P connector (front) terminal or wheel speed sensor 4P connector (rear) terminal (see table).

    Test condition Vehicle OFF (LOCK) mode
      VSA modulator-control unit 46P connector: disconnected
      Appropriate wheel speed sensor 2P connector (front): disconnected
      Appropriate wheel speed sensor 4P connector (rear): disconnected
    DTC VSA modulator-control unit 46P connector Appropriate Wheel Speed Sensor Connector Terminal
    C0031-14Left-front No. 42 Left-front wheel speed sensor 2P connector (female terminals) No. 2:
    C0034-14Right-front No. 35 Right-front wheel speed sensor 2P connector (female terminals) No. 2:
    C0037-14Left-rear No. 32 Left-rear wheel speed sensor 4P connector (female terminals) No. 4:
    C003A-14Right-rear No. 15 Right-rear wheel speed sensor 4P connector (female terminals) No. 4:
    GHH421529Courtesy of HONDA, U.S.A., INC.
    GHH421530Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    The SNSR- wires are OK. Go to step 9.

    NO 

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

  9. Wheel speed sensor(s) check

    -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 46P connector
    Appropriate wheel speed sensor 2P connector (front)
    Appropriate wheel speed sensor 4P connector (rear)

    -3. Turn the vehicle to the ON mode.

    -4. Clear the DTC with the HDS.

    -5. Turn the vehicle to the OFF (LOCK) mode, then the READY TO DRIVE mode.

    -6. Check for DTCs with the HDS.

    DTC Description DTC
    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 

    Check for loose terminals and poor connections in the VSA modulator-control unit 46P connector. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the VSA modulator-control unit .

    NO 

    Replace the original wheel speed sensor .

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