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Shift Lock System Circuit Troubleshooting

  1. Connect the HDS to the DLC (A) located under the driver's side of the dashboard.
    Fig 1: Identifying DLC
    G07342457Courtesy of AMERICAN HONDA MOTOR CO., INC.
  2. Turn the ignition switch to ON (II). Make sure the HDS communicates with the PCM. If it does not, go to the DLC circuit troubleshooting (see DLC CIRCUIT TROUBLESHOOTING ).
  3. Select Shift Lock Solenoid Test in the Miscellaneous Test Menu, and check that the shift lock solenoid operates with the HDS.

    Does the shift lock solenoid work properly? 

    YES  -Go to step  17.

    NO  -Go to step 4.

  4. Turn the ignition switch to LOCK (0).
  5. Remove the shift lever assembly (see SHIFT LEVER REMOVAL  ).
  6. Disconnect the shift lock solenoid connector (see SHIFT LOCK SOLENOID REPLACEMENT  ).
  7. Temporarily install the shift lever, then connect the shift lock solenoid connector (see step 2 Shift Lever Installation ).
  8. Turn the ignition switch to ON (II).
  9. Measure the voltage between shift lock solenoid connector terminal No. 1 and body ground.
    Fig 2: Measuring Voltage Between Shift Lock Solenoid Connector Terminal No. 1 And Body Ground
    G07342458Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    YES  -Go to step 10.

    NO  -Check for a blown No. 5 (7.5 A) fuse in the driver's under-dash fuse/relay box. If the fuse is blown, replace it. If the fuse blows again, repair a short in the No. 5 (7.5 A) fuse circuit. If the fuse is OK, repair an open in the wire between the shift lock solenoid connector and the driver's under-dash fuse/relay box.

  10. Shift the shift lever to P, and press the brake pedal. Do not press the accelerator pedal.
  11. Measure the voltage between shift lock solenoid connector terminals No. 1 and No. 2 while pressing the brake pedal.
    Fig 3: Measuring Voltage Between Shift Lock Solenoid Connector Terminals No. 1 And No. 2
    G07342459Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    YES  -Go to step 12.

    NO  -Go to step  13.

  12. Release the brake pedal, and measure the voltage between shift lock solenoid connector terminals No. 1 and No. 2. The shift lever must be in P.
    Fig 4: Identifying Shift Lock Solenoid Connector
    G07342460Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    YES  -Repair a short to body ground in the wire between PCM connector terminal A28 and the shift lock solenoid.

    NO  -Check the shift lock mechanism. If the mechanism is OK, replace the shift lock solenoid (see SHIFT LOCK SOLENOID REPLACEMENT  ).

  13. Turn the ignition switch to LOCK(0).
  14. Jump the SCS line with the HDS.
  15. Disconnect PCM connector A (49P).
  16. Check for continuity between PCM connector terminal A28 and shift lock solenoid connector terminal No. 2.
    Fig 5: Checking Continuity Between PCM Connector Terminal A28 And Shift Lock Solenoid Connector Terminal No. 2
    G07342461Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Update the PCM if it does not have the latest software (see ECM/PCM UPDATE ), or substitute a known-good PCM (see SUBSTITUTING THE ECM/PCM ), then recheck. If the symptom goes away with a known-good PCM, replace the original PCM (see ECM/PCM REPLACEMENT ).

    NO  -Repair an open in the wire between PCM connector terminal A28 and the shift lock solenoid connector.

  17. Monitor the Brake Switch in the A/T Data List with the HDS, and press the brake pedal.

    Is the Brake Switch ON? 

    YES  -Go to step  22.

    NO  -If the brake lights come on, go to step 17. If the brake lights do not work, repair the faulty brake light circuit.

  18. Turn the ignition switch to LOCK (0).
  19. Jump the SCS line with the HDS.
  20. Disconnect PCM connector A (49P).
  21. Measure the voltage between PCM connector terminal A42 and body ground when pressing the brake pedal and when the brake pedal is released.
    Fig 6: Measuring Voltage Between PCM Connector Terminal A42 And Body Ground
    G07342462Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage when pressing the brake pedal, and about 0 V when the pedal is released? 

    YES  -Update the PCM if it does not have the latest software (see ECM/PCM UPDATE ), or substitute a known-good PCM (see SUBSTITUTING THE ECM/PCM ), then recheck. If the symptom goes away with a known-good PCM, replace the original PCM (see ECM/PCM REPLACEMENT ).

    NO  -Repair an open in the wire between PCM connector terminal A42 and the brake pedal position switch.

  22. Turn the ignition switch to ON (II).
  23. Monitor the A/T P Switch in the A/T Data List with the HDS with the shift lever in P.

    Is the A/T P Switch ON? 

    YES  -Go to step  35.

    NO  -Go to step 24.

  24. Turn the ignition switch to LOCK (0).
  25. Disconnect the transmission range switch connector.
  26. Turn the ignition switch to ON (II).
  27. Measure the voltage between transmission range switch connector terminals No. 6 and No. 10.
    Fig 7: Measuring Voltage Between Transmission Range Switch Connector Terminals No. 6 And No. 10
    G07342463Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there more than 5 V? 

    YES  -Go to step 28.

    NO  -Go to step  29.

  28. Inspect the transmission range switch (see TRANSMISSION RANGE SWITCH TEST  ).

    Is the transmission range switch OK? 

    YES  -Check for poor connections or loose terminals at the transmission range switch.

    NO  -Replace the transmission range switch (see TRANSMISSION RANGE SWITCH REPLACEMENT  ).

  29. Turn the ignition switch to LOCK (0).
  30. Jump the SCS line with the HDS.
  31. Disconnect PCM connector B (49P).
  32. Check for continuity between PCM connector terminal B14 and body ground.
    Fig 8: Checking Continuity Between PCM Connector Terminal B14 And Body Ground
    G07342464Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair a short to body ground in the wire between PCM connector terminal B14 and the transmission range switch connector.

    NO  -Go to step 33.

  33. Check for continuity between PCM connector terminal B14 and transmission range switch connector terminal No. 6.
    Fig 9: Checking Continuity Between PCM Connector Terminal B14 And Transmission Range Switch Connector Terminal No. 6
    G07342465Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step 34.

    NO  -Repair an open in the wire between PCM connector terminal B14 and the transmission range switch connector.

  34. Check for continuity between transmission range switch connector terminal No. 10 and body ground.
    Fig 10: Checking Continuity Between Transmission Range Switch Connector Terminal No. 10 And Body Ground
    G07342466Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Update the PCM if it does not have the latest software (see ECM/PCM UPDATE ), or substitute a known-good PCM (see SUBSTITUTING THE ECM/PCM ), then recheck. If the symptom goes away with a known-good PCM, replace the original PCM (see ECM/PCM REPLACEMENT ).

    NO  -Repair an open in the wire between transmission range switch connector terminal No. 10 and body ground (G101) (see ENGINE WIRE HARNESS (M/T) ), or repair poor ground (G101).

  35. Check APP Sensor A (V) in the A/T Data List with the HDS. Do not press the accelerator pedal.

    Is the APP sensor A opening 5 % and more, or the APP sensor A voltage 1.16 V or higher? 

    YES  -Check the APP Sensor (see APP SENSOR SIGNAL INSPECTION ).

    NO  -Update the PCM if it does not have the latest software (see ECM/PCM UPDATE ), or substitute a known-good PCM (see SUBSTITUTING THE ECM/PCM ), then recheck. If the symptom goes away with a known-good PCM, replace the original PCM (see ECM/PCM REPLACEMENT ).

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