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HOMESERVICE MANUALSCHEVROLET2006COBALT SS, 4D SEDAN, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 761 (ABS COMPONENTS)DTC TROUBLESHOOTINGDTC 12, 14, 16, 18: WHEEL SPEED SENSOR SIGNAL MALFUNCTION
2006 Chevrolet Cobalt SS, 4D Sedan, Standard

DTC 12, 14, 16, 18: Wheel Speed Sensor Signal Malfunction

2006 Chevrolet Cobalt SS, 4D Sedan, StandardSECTION DTC 12, 14, 16, 18: Wheel Speed Sensor Signal Malfunction
WARNING: This page is about a different car, the 2011 Honda Insight and 2010 Honda Insight. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: If the ABS indicator come on because of electrical noise, the indicator will go off when you test-drive the vehicle at 9 mph (15 km/h) after the system returns to normal.
  1. Turn the ignition switch to LOCK (0).
  2. Check that the appropriate wheel speed sensor is properly mounted (see WHEEL SPEED SENSOR REPLACEMENT  ).
    WHEEL SPEED SENSOR SPECIFICATION

    DTC Appropriate Wheel Speed Sensor
    12 Right-front
    14 Left-front
    16 Right-rear
    18 Left-rear

    Is the wheel speed sensor installation OK? 

    YES  -Go to step 3.

    NO  -Reinstall the wheel speed sensor, and check the mounting position (see WHEEL SPEED SENSOR REPLACEMENT  ).

  3. Inspect the appropriate magnetic encoder for damage, debris, and correct installation.
    DTC CHART

    DTC Appropriate Magnetic Encoder Note
    12 Right-front Remove the driveshaft outboard joint from the appropriate wheel hub (see KNUCKLE/HUB/WHEEL BEARING REPLACEMENT ).
    14 Left-front
    16 Right-rear Remove the hub bearing unit (see HUB BEARING UNIT REPLACEMENT ).
    18 Left-rear

    Is the magnetic encoder OK? 

    YES  -Go to step 4.

    NO  -Replace the wheel bearing (front) or the hub bearing unit (rear):

  4. Disconnect the ABS modulator-control unit 47P connector (see ABS MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION  ).
  5. Check for continuity between the appropriate wheel speed sensor GND terminal and other wheel speed sensor GND terminals of the ABS modulator-control unit 47P connector (see table).
    DTC CHART

    DTC Appropriate Terminal Other Terminals
    12 FR-GND: No. 33 No. 46 No. 42 No. 37
    14 FL-GND: No. 46 No. 33 No. 42 No. 37
    16 RR-GND: No. 42 No. 33 No. 46 No. 37
    18 RL-GND: No. 37 No. 33 No. 46 No. 42
    Fig 1: Checking Continuity Between Appropriate Wheel Speed Sensor GND Terminal And Speed Sensor GND Terminals
    G06430795Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair a short in the wires between the appropriate wheel speed sensor and the other wheel speed sensor.

    NO  -Go to step 6.

  6. Substitute a known-good wheel speed sensor (see WHEEL SPEED SENSOR REPLACEMENT  ).
  7. Reconnect all connectors.
  8. Turn the ignition switch to ON (II).
  9. Clear the DTC with the HDS.
  10. Turn the ignition switch to LOCK (0).
  11. Test-drive the vehicle at 19 mph (30 km/h) or more.
    NOTE: Drive the vehicle on the road, not on a lift.
  12. Check for DTCs with the HDS.

    Is DTC 12, 14, 16, or 18 indicated? 

    YES  -Check for loose terminals in the ABS modulator-control unit 47P connector. If necessary, substitute a known-good ABS modulator-control unit (see ABS MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION  ), and retest.

    NO  -Replace the original wheel speed sensor (see WHEEL SPEED SENSOR REPLACEMENT  ).

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.