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DTC 51: Motor Lock

  1. Check the No. 10 (30 A) fuse in the underhood fuse/relay box, and reinstall the fuse if it is OK.

    Is the fuse OK? 

    1. YES -  Go to step 2.
    2. NO -  Replace the fuse, and recheck.
  2. Disconnect the ABS modulator-control unit 25P connector.
  3. Measure the voltage between the ABS modulator-control unit 25P connector terminal No. 9 and body ground.
    Fig 1: Measuring Voltage Between ABS Modulator-Control Unit Connector Terminal And Body Ground
    G03652581Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    1. YES -  Go to step 4.
    2. NO -  Repair open in the wire between the No. 10 (30 A) fuse and the ABS modulator-control unit.
  4. Connect the ABS modulator-control unit 25P connector.
  5. Clear the DTC (see HOW TO CLEAR DTCS  ).
  6. Test-drive the vehicle at 6 mph (10 km/h) or more.

    Does the ABS indicator come on, and is DTC 51 indicated? 

    1. YES -  Replace the ABS modulator-control unit (see ABS MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION  ).
    2. NO -  The system is OK at this time.
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