LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Acura >> 2009 >> CSX Base, Automatic >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission >> Automatic Transmission >> DTC Troubleshooting >> DTC P0705: Short in Transmission Range Switch Circuit (Multiple Shift-position Input)
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC P0705: Short in Transmission Range Switch Circuit (Multiple Shift-position Input)

NOTE:
  • Before you troubleshoot, record all freeze data and any on-board snapshot, and review General Troubleshooting Information (see GENERAL TROUBLESHOOTING INFORMATION  ).
  • This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.
  1. Turn the ignition switch ON (II).
  2. Clear the DTC with the HDS.
  3. Start the engine.
  4. With the brake pedal pressed, move the shift lever through all positions. Stop for at least 1 second in each position.
  5. Monitor the OBD STATUS for P0705 in the DTCs MENU with the HDS.

    Does the screen indicate FAILED? 

    YES  -Go to step 6.

    NO  -Intermittent failure, the system is OK at this time. Check for intermittent short to body ground in the wires between the transmission range switch and the PCM. If the screen indicates NOT COMPLETED, go to step  3.

  6. Turn the ignition switch OFF.
  7. Inspect the transmission range switch (see TRANSMISSION RANGE SWITCH TEST  ).

    Is the switch OK? 

    YES  -With the switch connector disconnected, go to step 8.

    NO  -Replace the transmission range switch (see TRANSMISSION RANGE SWITCH REPLACEMENT  ), then go to step  45.

  8. Turn the ignition switch ON (II).
  9. Measure the voltage between transmission range switch connector terminals No. 6 and No. 10.
    Fig 1: Measuring Voltage Between Transmission Range Switch Connector Terminals No. 6 And No. 10
    G06264890Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    YES  -Go to step  15.

    NO  -Go to step 10.

  10. Turn the ignition switch OFF.
  11. Jump the SCS line with the HDS.
  12. Disconnect PCM connector B (44P).
  13. Check for continuity between PCM connector terminal B13 and body ground.
    Fig 2: Checking Continuity Between PCM Connector Terminal B13 And Body Ground
    G06264891Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair short to body ground in the wire between PCM connector terminal B13 and the transmission range switch, then go to step  45.

    NO  -Go to step 14.

  14. Check for continuity between transmission range switch connector terminal No. 10 and body ground.
    Fig 3: Checking Continuity Between Transmission Range Switch Connector Terminal No. 10 And Body Ground
    G06264892Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step  52.

    NO  -Repair open in the wire between transmission range switch connector terminal No. 10 and ground G101) (see ENGINE WIRE HARNESS (A/T) ), or repair poor ground G101), then go to step  45.

  15. Measure the voltage between transmission range switch connector terminals No. 7 and No. 10.
    Fig 4: Measuring Voltage Between Transmission Range Switch Connector Terminals No. 7 And No. 10
    G06264893Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    YES  -Go to step  20.

    NO  -Go to step 16.

  16. Turn the ignition switch OFF.
  17. Jump the SCS line with the HDS.
  18. Disconnect PCM connector B (44P).
  19. Check for continuity between PCM connector terminal B14 and body ground.
    Fig 5: Checking Continuity Between PCM Connector Terminal B14 And Body Ground
    G06264894Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair short to body ground in the wire between PCM connector terminal B14 and the transmission range switch, then go to step  45.

    NO  -Go to step  52.

  20. Measure the voltage between transmission range switch connector terminals No. 2 and No. 10.
    Fig 6: Measuring Voltage Between Transmission Range Switch Connector Terminals No. 2 And No. 10
    G06264895Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there about 5 V? 

    YES  -Go to step  25.

    NO  -Go to step 21.

  21. Turn the ignition switch OFF.
  22. Jump the SCS line with the HDS.
  23. Disconnect PCM connector B (44P).
  24. Check for continuity between PCM connector terminal B12 and body ground.
    Fig 7: Checking Continuity Between PCM Connector Terminal B12 And Body Ground
    G06264896Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair short to body ground in the wire between PCM connector terminal B12 and the transmission range switch, then go to step  45.

    NO  -Go to step  52.

  25. Measure the voltage between transmission range switch connector terminals No. 8 and No. 10.
    Fig 8: Measuring Voltage Between Transmission Range Switch Connector Terminals No. 8 And No. 10
    G06264897Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    YES  -Go to step  30.

    NO  -Go to step 26.

  26. Turn the ignition switch OFF.
  27. Jump the SCS line with the HDS.
  28. Disconnect PCM connector B (44P).
  29. Check for continuity between PCM connector terminal B21 and body ground.
    Fig 9: Checking Continuity Between PCM Connector Terminal B21 And Body Ground
    G06264898Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair short to body ground in the wire between PCM connector terminal B21 and the transmission range switch, then go to step  45.

    NO  -Go to step  52.

  30. Measure the voltage between transmission range switch connector terminals No. 3 and No. 10.
    Fig 10: Measuring Voltage Between Transmission Range Switch Connector Terminals No. 3 And No. 10
    G06264899Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    YES  -Go to step  35.

    NO  -Go to step 31.

  31. Turn the ignition switch OFF.
  32. Jump the SCS line with the HDS.
  33. Disconnect PCM connector B (44P).
  34. Check for continuity between PCM connector terminal B15 and body ground.
    Fig 11: Checking Continuity Between PCM Connector Terminal B15 And Body Ground
    G06264900Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair short to body ground in the wire between PCM connector terminal B15 and the transmission range switch, then go to step  45.

    NO  -Go to step  52.

  35. Measure the voltage between transmission range switch connector terminals No. 5 and No. 10.
    Fig 12: Measuring Voltage Between Transmission Range Switch Connector Terminals No. 5 And No. 10
    G06264901Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    YES  -Go to step  40.

    NO  -Go to step 36.

  36. Turn the ignition switch OFF.
  37. Jump the SCS line with the HDS.
  38. Disconnect PCM connector B (44P).
  39. Check for continuity between PCM connector terminal B28 and body ground.
    Fig 13: Checking Continuity Between PCM Connector Terminal B28 And Body Ground
    G06264902Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair short to body ground in the wire between PCM connector terminal B28 and the transmission range switch, then go to step  45.

    NO  -Go to step  52.

  40. Measure the voltage between transmission range switch connector terminals No. 1 and No. 10.
    Fig 14: Measuring Voltage Between Transmission Range Switch Connector Terminals No. 1 And No. 10
    G06264903Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    YES  -Go to step  52.

    NO  -Go to step 41.

  41. Turn the ignition switch OFF.
  42. Jump the SCS line with the HDS.
  43. Disconnect PCM connector B (44P).
  44. Check for continuity between PCM connector terminal B22 and body ground.
    Fig 15: Checking Continuity Between PCM Connector Terminal B22 And Body Ground
    G06264904Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair short to body ground in the wire between PCM connector terminal B22 and the transmission range switch, then go to step 45.

    NO  -Go to step  52.

  45. Reconnect all connectors.
  46. Turn the ignition switch ON (II).
  47. Clear the DTC with the HDS.
  48. Start the engine.
  49. With the brake pedal pressed, move the shift lever through all positions. Stop for at least 1 second in each position.
  50. Check for DTCs with the HDS.

    Is DTC P0705 indicated? 

    YES  -Check for intermittent short to body ground in the wire between the transmission range switch and the PCM, then go to step  1.

    NO  -Go to step 51.

  51. Monitor the OBD STATUS for P0705 in the DTCs MENU with the HDS.

    Does the screen indicate PASSED? 

    YES  -Troubleshooting is complete. If any other DTCs were indicated in step  50, go to the INDICATED DTC'S TROUBLESHOOTING .

    NO  -If the screen indicates FAILED, check for intermittent short to body ground in the wire between the transmission range switch and the PCM, then go to step  1. If the screen indicates NOT COMPLETED, go to step  48.

  52. Update the PCM if it does not have the latest software (see UPDATING THE PCM  ), or substitute a known- good PCM (see SUBSTITUTING THE PCM  ).
  53. Start the engine.
  54. With the brake pedal pressed, move the shift lever through all positions. Stop for at least 1 second in each position.
  55. Check for DTCs with the HDS.

    Is DTC P0705 indicated? 

    YES  -Check for intermittent short to body ground in the wire between the transmission range switch and the PCM. If the PCM was updated, substitute a known-good PCM (see SUBSTITUTING THE PCM  ), then go to step  53. If the PCM was substituted, go to step  1.

    NO  -Go to step 56.

  56. Monitor the OBD STATUS for P0705 in the DTCs MENU with the HDS.

    Does the screen indicate PASSED? 

    YES  -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see ECM/PCM REPLACEMENT ). If any other DTCs were indicated in step  55, go to the INDICATED DTC'S TROUBLESHOOTING .

    NO  -If the screen indicates FAILED, check for intermittent short to body ground in the wire between the transmission range switch and the PCM. If the PCM was updated, substitute a known- good PCM (see SUBSTITUTING THE PCM  ), then go to step  53. If the PCM was substituted, go to step  1. If the screen indicates NOT COMPLETED, go to step  53.

scientia non olet · About LEMON Manuals