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Home >> Acura >> 2007 >> TL Base >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission >> DTC Troubleshooting >> DTC P0705: Short in Transmission Range Switch Circuit (Multiple Shift-position Input)
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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 to 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  -If the screen indicates PASSED, 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 to LOCK (0).
  7. Inspect the transmission range switch (see TRANSMISSION RANGE SWITCH TEST  ).

    Is the switch OK? 

    YES  -Go to step 8.

    NO  -Replace the transmission range switch (see TRANSMISSION RANGE SWITCH REPLACEMENT  ), then go to step  53.

  8. Turn the ignition switch to ON (II).
  9. Shift to any position other than P.
  10. Measure the voltage between PCM connector terminals D13 and A3.
    Fig 1: Measuring Voltage Between PCM Connector Terminals D13 And A3
    G05458828Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    YES  -Go to step  17.

    NO  -Go to step 11.

  11. Turn the ignition switch to LOCK (0).
  12. Jump the SCS line with the HDS.
  13. Disconnect PCM connector D (17P).
  14. Check for continuity between PCM connector terminal D13 and body ground.
    Fig 2: Checking Continuity Between PCM Connector Terminal D13 And Body Ground
    G05458829Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair short to body ground in the wire between PCM connector terminal D13 and the transmission range switch, then go to step  53.

    NO  -Go to step 15.

  15. Disconnect PCM connectors A (31P) and B (24P).
  16. Check for continuity between PCM connector terminal A3 and body ground, and between PCM connector terminal B15 and body ground.
    Fig 3: Checking Continuity Between PCM Connector Terminal A3 And Body Ground
    G05458830Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Go to step  60.

    NO  -Repair open in the wire between PCM connector terminals A3, B15, and ground (G101), or repair poor ground (G101), then go to step  53.

  17. Shift to any position other than R.
  18. Measure the voltage between PCM connector terminals D16 and A3.
    Fig 4: Measuring Voltage Between PCM Connector Terminals D16 And A3
    G05458831Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    YES  -Go to step  23.

    NO  -Go to step 19.

  19. Turn the ignition switch to LOCK (0).
  20. Jump the SCS line with the HDS.
  21. Disconnect PCM connector D (17P).
  22. Check for continuity between PCM connector terminal D16 and body ground.
    Fig 5: Checking Continuity Between PCM Connector Terminal D16 And Body Ground
    G05458832Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair short to body ground in the wire between PCM connector terminal D16 and the transmission range switch, then go to step  53.

    NO  -Go to step  60.

  23. Shift to any position other than N.
  24. Measure the voltage between PCM connector terminals B23 and A3.
    Fig 6: Measuring Voltage Between PCM Connector Terminals B23 And A3
    G05458833Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    YES  -Go to step  29.

    NO  -Go to step 25.

  25. Turn the ignition switch to LOCK (0).
  26. Jump the SCS line with the HDS.
  27. Disconnect PCM connector B (24P).
  28. Check for continuity between PCM connector terminal B23 and body ground.
    Fig 7: Checking Continuity Between PCM Connector Terminal B23 And Body Ground
    G05458834Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair short to body ground in the wire between PCM connector terminal B23 and the transmission range switch, then go to step  53.

    NO  -Go to step  60.

  29. Shift to any position other than D.
  30. Measure the voltage between PCM connector terminals C10 and A3.
    Fig 8: Measuring Voltage Between PCM Connector Terminals C10 And A3
    G05458835Courtesy 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 to LOCK (0).
  32. Jump the SCS line with the HDS.
  33. Disconnect PCM connector C (22P).
  34. Check for continuity between PCM connector terminal C10 and body ground.
    Fig 9: Checking Continuity Between PCM Connector Terminal C10 And Body Ground
    G05458836Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair short to body ground in the wire between PCM connector terminal C10 and the transmission range switch, then go to step  53.

    NO  -Go to step  60.

  35. Shift to any position other than L.
  36. Measure the voltage between PCM connector terminals C18 and A3.
    Fig 10: Measuring Voltage Between PCM Connector Terminals C18 And A3
    G05458837Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    YES  -Go to step  41.

    NO  -Go to step 37.

  37. Turn the ignition switch to LOCK (0).
  38. Jump the SCS line with the HDS.
  39. Disconnect PCM connector C (22P).
  40. Check for continuity between PCM connector terminal C18 and body ground.
    Fig 11: Checking Continuity Between PCM Connector Terminal C18 And Body Ground
    G05458838Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair short to body ground in the wire between PCM connector terminal C18 and the transmission range switch, then go to step  53.

    NO  -Go to step  60.

  41. Shift to any position other than P, R, or N.
  42. Measure the voltage between PCM connector terminals C21 and A3.
    Fig 12: Measuring Voltage Between PCM Connector Terminals C21 And A3
    G05458839Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    YES  -Go to step  47.

    NO  -Go to step 43.

  43. Turn the ignition switch to LOCK (0).
  44. Jump the SCS line with the HDS.
  45. Disconnect PCM connector C (22P).
  46. Check for continuity between PCM connector terminal C21 and body ground.
    Fig 13: Checking Continuity Between PCM Connector Terminal C21 And Body Ground
    G05458840Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair short to body ground in the wire between PCM connector terminal C21 and the transmission range switch, then go to step  53.

    NO  -Go to step  60.

  47. Shift to any position other than D or L.
  48. Measure the voltage between PCM connector terminals C19 and A3.
    Fig 14: Measuring Voltage Between PCM Connector Terminals C19 And A3
    G05458841Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there battery voltage? 

    YES  -Go to step  60.

    NO  -Go to step 49.

  49. Turn the ignition switch to LOCK (0).
  50. Jump the SCS line with the HDS.
  51. Disconnect PCM connector C (22P).
  52. Check for continuity between PCM connector terminal C19 and body ground.
    Fig 15: Checking Continuity Between PCM Connector Terminal C19 And Body Ground
    G05458842Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is there continuity? 

    YES  -Repair short to body ground in the wire between PCM connector terminal C19 and the transmission range switch, then go to step  53.

    NO  -Go to step  60.

  53. Reconnect all connectors.
  54. Turn the ignition switch to ON (II).
  55. Clear the DTC with the HDS.
  56. Start the engine.
  57. With the brake pedal pressed, move the shift lever through all positions. Stop for at least 1 second in each position.
  58. 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 59.

  59. 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  58, 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  56.

  60. 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  ).
  61. Start the engine.
  62. With the brake pedal pressed, move the shift lever through all positions. Stop for at least 1 second in each position.
  63. 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  61. If the PCM was substituted, go to step  1.

    NO  -Go to step 64.

  64. 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  63, 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  61. If the PCM was substituted, go to step  1. If the screen indicates NOT COMPLETED, go to step  61.

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