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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: Locating Data Link Connector Components
    G06951166Courtesy of AMERICAN HONDA MOTOR CO., INC.
  2. Turn the ignition switch to ON (II).
  3. Make sure the HDS communicates with the PCM. If it does not, go to the DLC circuit troubleshooting (see DLC CIRCUIT TROUBLESHOOTING ).
  4. Check the Accelerator Pedal Position (APP) Sensor in the Data List with the HDS. Do not press the accelerator.

    Is the APP Sensor opening 5 % or above, or is the APP Sensor A voltage 1.16 V or above? 

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

    NO  -Go to step  5.

  5. Check the Brake Switch signal with the HDS in the A/T Data List while pressing the brake pedal, and when the brake pedal is released.

    Does the brake pedal position switch work properly? 

    YES  -Go to step  6.

    NO  -Troubleshoot the brake pedal position switch signal circuit (see BRAKE PEDAL POSITION SWITCH SIGNAL CIRCUIT TROUBLESHOOTING ).

  6. Check the A/T P Switch signal with the HDS in the A/T Data List. The shift lever must be in P.

    Is the A/T P Switch ON? 

    YES  -Go to step  7.

    NO  -Go to step  23.

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

    NO  -Go to step  8.

  8. Turn the ignition switch to LOCK (0).
  9. Remove the center console (see CENTER CONSOLE REMOVAL/INSTALLATION ).
  10. Disconnect the park pin switch/shift lock solenoid/A/T gear position indicator panel light 6P connector.
  11. Turn the ignition switch to ON (II).
  12. Measure the voltage between park pin switch/shift lock solenoid/A/T gear position indicator panel light 6P connector terminal No. 2 and body ground.
    Fig 2: Measuring Voltage Between Park Pin Switch/Shift Lock Solenoid/A/T Gear Position Indicator Panel Light 6P Connector Terminal No. 2 And Body Ground
    G06951167Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    YES  -Go to step  16.

    NO  -Go to step  13.

  13. Check for blown No. B22(7.5A) fuse in the under-dash fuse/relay box.

    Is the fuse OK? 

    YES  -Repair an open in the wire between park pin switch/shift lock solenoid/A/T gear position indicator panel light 6P connector terminal No. 2 and the under-dash fuse/relay box.

    NO  -Go to step  14.

  14. Turn the ignition switch to LOCK (0).
  15. Check for continuity between park pin switch/shift lock solenoid/A/T gear position indicator panel light 6P connector terminal No. 2 and body ground.
    Fig 3: Checking For Continuity Between Park Pin Switch/Shift Lock Solenoid/A/T Gear Position Indicator Panel Light 6P Connector Terminal No. 2 And Body Ground
    G06951168Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair a short in the wire between park pin switch/shift lock solenoid/A/T gear position indicator panel light 6P connector terminal No. 2 and the under-dash fuse/relay box.

    NO  -Check for a short in the wire between park pin switch/shift lock solenoid/A/T gear position indicator panel light 6P connector terminal No. 2 and the shift lock solenoid, and repair it if necessary. If the wire is OK, replace the shift lock solenoid (see SHIFT LOCK SOLENOID REPLACEMENT  ).

  16. Shift the shift lever to P, and press the brake pedal. Do not press the accelerator.
  17. Measure the voltage between park pin switch/shift lock solenoid/A/T gear position indicator panel light 6P connector terminals No. 2 and No. 6 while pressing the brake pedal.
    Fig 4: Measuring Voltage Between Park Pin Switch/Shift Lock Solenoid/A/T Gear Position Indicator Panel Light 6P Connector Terminals No. 2 And No. 6
    G06951169Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    YES  -Go to step  18.

    NO  -Go to step  19.

  18. Release the brake pedal, and measure the voltage between park pin switch/shift lock solenoid/A/T gear position indicator panel light 6P connector terminals No. 2 and No. 6. The shift lever must be in P.
    Fig 5: Measuring Voltage Between Park Pin Switch/Shift Lock Solenoid/A/T Gear Position Indicator Panel Light 6P Connector Terminals No. 2 And No. 6
    G06951170Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    YES  -Repair a short in the wire between park pin switch/shift lock solenoid/A/T gear position indicator panel light 6P connector terminal No. 6 and the PCM connector.

    NO  -Check for a short or an open in the wire between the park pin switch/shift lock solenoid/A/T gear position indicator panel light 6P connector and the shift lock solenoid, and check the shift lock mechanism, and repair them if necessary. If they are OK, replace the shift lock solenoid (see SHIFT LOCK SOLENOID REPLACEMENT  ).

  19. Turn the ignition switch to LOCK (0).
  20. Jump the SCS line with the HDS.
  21. Disconnect PCM connector A (44P).
  22. Check for continuity between PCM connector terminal A27 and park pin switch/shift lock solenoid/A/T gear position indicator panel light 6P connector terminal No. 6.
    Fig 6: Checking For Continuity Between PCM Connector Terminal A27 And Park Pin Switch/Shift Lock Solenoid/A/T Gear Position Indicator Panel Light 6P Connector Terminal No. 6
    G06951171Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Update the PCM if it does not have the latest software (see ELD REPLACEMENT ), or substitute a known-good PCM (see SUBSTITUTING THE ECM/PCM ), and 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 A27 and the park pin switch/shift lock solenoid/A/T gear position indicator panel light 6P connector.

  23. Turn the ignition switch to LOCK (0).
  24. Disconnect the transmission range switch 8P connector.
  25. Turn the ignition switch to ON (II).
  26. Measure the voltage between transmission range switch 8P connector terminals No. 3 and No. 7.
    Fig 7: Measuring Voltage Between Transmission Range Switch 8P Connector Terminals No. 3 And No. 7
    G06951172Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    YES  -Go to step  27.

    NO  -Go to step  28.

  27. Test the transmission range switch (see TRANSMISSION RANGE SWITCH TEST  ).

    Is the transmission range switch OK? 

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

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

  28. Turn the ignition switch to LOCK (0).
  29. Jump the SCS line with the HDS.
  30. Disconnect PCM connector B (44P).
  31. Check for continuity between PCM connector terminal B13 and transmission range switch 8P connector terminal No. 7.
    Fig 8: Checking For Continuity Between PCM Connector Terminal B13 And Transmission Range Switch 8P Connector Terminal No. 7
    G06951173Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step  32.

    NO  -Repair an open In the wire between PCM connector terminal B13 and the transmission range switch 8P connector.

  32. Check for continuity between transmission range switch 8P connector terminal No. 3 and body ground.
    Fig 9: Checking For Continuity Between Transmission Range Switch 8P Connector Terminal No. 3 And Body Ground
    G06951174Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Update the PCM if it does not have the latest software (see ELD REPLACEMENT ), or substitute a known-good PCM (see SUBSTITUTING THE ECM/PCM ), and 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 8P connector terminal No. 3 and body ground (G101), or repair poor body ground (G101).

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