DTC Troubleshooting

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.
^ 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.
Is the switch OK?

YES - Go to step 8.

NO - Replace the transmission range switch, then go to step 52.

8. Turn the ignition switch ON (II).
9. Shift to any position other than P.
10. Measure the voltage between PCM connector terminals D6 and A9.





Is there about 5 V?

YES - Go to step 17.

NO - Go to step 11.

11. Turn the ignition switch OFF.
12. Jump the SCS line with the HDS.
13. Disconnect PCM connector D (17P).
14. Check for continuity between PCM connector terminal D6 and body ground.





Is there continuity?

YES - Repair short to body ground in the wire between PCM connector terminal D6 and the transmission range switch; then go to step 52.

NO - Go to step 15.

15. Disconnect PCM connector A (31P).
16. Check for continuity between PCM connector terminal A8 and body ground, and between PCM connector terminal A9 and body ground.





Is there continuity?

YES - Go to step 59.

NO - Repair open in the wire between PCM connector terminals A8, A9, and ground (G101), or repair poor ground (G101), then go to step 52.

17. Shift to any position other than R.
18. Measure the voltage between PCM connector terminals D5 and A9.





Is there about 5 V?

YES - Go to step 23.

NO - Go to step 19.

19. Turn the ignition switch OFF.
20. Jump the SCS line with the HDS.
21. Disconnect PCM connector D (17P).
22. Check for continuity between PCM connector terminal D5 and body ground.





Is there continuity?

YES - Repair short to body ground in the wire between PCM connector terminal D5 and the transmission range switch, then go to step 52.

NO - Go to step 59.

23. Measure the voltage between PCM connector terminals C12 and A9.





Is there about 5 V?

YES - Go to step 28.

NO - Go to step 24.

24. Turn the ignition switch OFF.
25. Jump the SCS line with the HDS.
26. Disconnect PCM connector C (22P).
27. Check for continuity between PCM connector terminal C12 and body ground.





Is there continuity?

YES - Repair short to body ground in the wire between PCM connector terminal C12 and the transmission range switch, then go to step 52.

NO - Go to step 59.

28. Shift to any position other than N.
29. Measure the voltage between PCM connector terminals C20 and A9.





Is there about 5 V?

YES - Go to step 34.

NO - Go to step 30.

30. Turn the ignition switch OFF.
31. Jump the SCS line with the HDS.
32. Disconnect PCM connector C (22P).
33. Check for continuity between PCM connector terminal C20 and body ground.





Is there continuity?

YES - Repair short to body ground in the wire between PCM connector terminal C20 and the transmission range switch, then go to step 52.

NO - Go to step 59.

34. Shift to any position other than D.
35. Measure the voltage between PCM connector terminals C17 and A9.





Is there about 5 V?

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 C (22P).
39. Check for continuity between PCM connector terminal C17 and body ground.





Is there continuity?

YES - Repair short to body ground in the wire between PCM connector terminal C17 and the transmission range switch, then go to step 52.

NO - Go to step 59.

40. Shift to any position other than D3.
41. Measure the voltage between PCM connector terminals C9 and A9.





Is there about 5 V?

YES - Go to step 46.

NO - Go to step 42.

42. Turn the ignition switch OFF.
43. Jump the SCS line with the HDS.
44. Disconnect PCM connector C (22P).
45. Check for continuity between PCM connector terminal C9 and body ground.





Is there continuity?

YES - Repair short to body ground in the wire between PCM connector terminal C9 and the transmission range switch, then go to step 52.

NO - Go to step 59.

46. Shift to any positions other than D, D3, or 2.
47. Measure the voltage between PCM connector terminals C18 and A9.





Is there about 5 V?

YES - Go to step 59.

NO - Go to step 48.

48. Turn the ignition switch OFF.
49. Jump the SCS line with the HDS.
50. Disconnect PCM connector C (22P).
51. Check for continuity between PCM connector terminal C18 and body ground.





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 52.

NO - Go to step 59.

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

58. 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 57, 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 55.

59. Update the PCM if it does not have the latest software, or substitute a known-good PCM.
60. Start the engine.
61. With the brake pedal pressed, move the shift lever through all positions. Stop for at least 1 second in each position.
62. 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, then go to step 60. If the PCM was substituted, go to step 1.

NO - Go to step 63.

63. 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. If any other DTCs were indicated in step 62, 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, then go to step 60. If the PCM was substituted, go to step 1. If the screen indicates NOT COMPLETED, go to step 60.