Transmission Control Systems
DTC P0716: Problem in Input Shaft (Mainshaft) Speed Sensor CircuitNOTE:
^ 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. Check for proper input shaft (mainshaft) speed sensor installation.
4. Raise the front of the vehicle, make sure it is securely supported, and allow the front wheels to rotate freely. Or raise the vehicle on a hoist.
5. Start the engine, disable the VSA by pressing the VSA OFF switch, run the vehicle in the D position, and hold the vehicle at speeds over 30 mph (48 km/h) for more than 10 seconds. Slow down and stop the wheels.
6. Monitor the OBD STATUS for P0716 in the DTCs MENU with the HDS.
Does the screen indicate FAILED?
YES - Go to step 7.
NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals between the input shaft (mainshaft) speed sensor and the PCM. If the screen indicates NOT COMPLETED, go to step 5.
7. Turn the ignition switch OFF.
8. Jump the SCS line with the HDS.
9. Disconnect PCM connectors B (49P), C (49P), and the input shaft (mainshaft) speed sensor connector.
10. Check for continuity between PCM connector terminals B1, B40, B41, C41 and body ground.
Is there continuity?
YES - Go to step 11.
NO - Repair open in the wires between PCM connector terminals 61, B40, B41, C41, and ground (G101, G102), or repair poor ground (G101, G102), then go to step 29.
11. Connect PCM connectors B (49P) and C (49P).
12. Turn the ignition switch ON (II).
13. Measure voltage between input shaft (mainshaft) speed sensor connector terminal No. 1 and body ground.
Is there about 5 V?
YES - Go to step 18.
NO - Go to step 14.
14. Turn the ignition switch OFF.
15. Disconnect PCM connector C (49P).
16. Check for continuity between PCM connector terminal C12 and input shaft (mainshaft) speed sensor connector terminal No. 1.
Is there continuity?
YES - Go to step 17.
NO - Repair open in the wire between PCM connector terminal C12 and the input shaft (mainshaft) speed sensor, then go to step 29.
17. 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 input shaft (mainshaft) speed sensor, then go to step 29.
NO - Go to step 35.
18. Turn the ignition switch OFF.
19. Disconnect PCM connector B (49P).
20. Check for continuity between input shaft (mainshaft) speed sensor connector terminal No. 2 and body ground.
Is there continuity?
YES - Repair short to body ground in the wire between PCM connector terminal B37 and the input shaft (mainshaft) speed sensor, then go to step 29.
NO - Go to step 21.
21. Disconnect PCM connector C (49P).
22. Check for continuity between PCM connector terminal C16 and input shaft (mainshaft) speed sensor connector terminal No. 3.
Is there continuity?
YES - Go to step 23.
NO - Repair open in the wire between the input shaft (mainshaft) speed sensor and PCM connector terminal C16, then go to step 29.
23. Connect PCM connectors B (49P) and C (49P).
24. Turn the ignition switch ON (II).
25. Measure voltage between input shaft (mainshaft) speed sensor connector terminals No. 2 and No. 3.
Is there about 5 V?
YES - Go to step 29.
NO - Go to step 26.
26. Turn the ignition switch OFF.
27. Disconnect PCM connector B (49P).
28. Check for continuity between PCM connector terminal B37 and input shaft (mainshaft) speed sensor connector terminal No. 2.
Is there continuity?
YES - Go to step 35.
NO - Repair open in the wire between PCM connector terminal B37 and the input shaft (mainshaft) speed sensor, then go to step 29.
29. Reconnect all connectors.
30. Turn the ignition switch ON (II).
31. Clear the DTC with the HDS.
32. Start the engine, disable the VSA by pressing the VSA OFF switch, run the vehicle in the D position and hold the vehicle at speeds over 30 mph (48 km/h) for more than 10 seconds. Slow down and stop the wheels.
33. Check for DTCs with the HDS.
Is DTC P0716 indicated?
YES - Check for poor connections or loose terminals between the input shaft (mainshaft) speed sensor and the PCM, then go to step 1.
NO - Go to step 34.
34. Monitor the OBD STATUS for P0716 in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES - Troubleshooting is complete. If any other DTCs were indicated in step 33, go to the indicated DTC's troubleshooting.
NO - If the screen indicates FAILED, check for poor connections or loose terminals between the input shaft (mainshaft) speed sensor and the PCM, then go to step 1. If the screen indicates NOT COMPLETED, go to step 32.
35. Update the PCM if it does not have the latest software, or substitute a known-good PCM.
36. Start the engine, disable the VSA by pressing the VSA OFF switch, run the vehicle in the D position and hold the vehicle at speeds over 30 mph (48 km/h) for more than 10 seconds. Slow down and stop the wheels.
37. Check for DTCs with the HDS.
Is DTC P0716 indicated?
YES - Check for poor connections or loose terminals between the input shaft (mainshaft) speed sensor and the PCM. If the PCM was updated, substitute a known-good PCM, then go to step 36. If the PCM was substituted, go to step 1.
NO - Go to step 38.
38. Monitor the OBD STATUS for P0716 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 37, go to the indicated DTC's troubleshooting.
NO - If the screen indicates FAILED, check for poor connections or loose terminals between the input shaft (mainshaft) speed sensor and the PCM. If the PCM was updated, substitute a known-good PCM, then go to step 36. If the PCM was substituted, go to step 1. If the screen indicates NOT COMPLETED, go to step 36.