DTC Troubleshooting: P0716 (15-5)

DTC P0716: Problem in Input Shaft (Mainshaft) Speed Sensor Circuit NOTE: Record all freeze data and review General Troubleshooting Information before you troubleshoot. This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission. Record all freeze data, then clear the DTC with the HDS. Check for proper input shaft (mainshaft) speed sensor installation. Raise the front of the vehicle, make sure it is securely supported, and allow the front wheels to rotate freely. Or raise the vehicle. Start the engine, drive the vehicle in the D position, and hold the vehicle at speeds over 48 km/h (30 mph) for more than 10 seconds. Monitor the OBD status for P0716 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail. Does the result indicate a fail?
YES | - | Go to Step 6 .
NO | - | Intermittent failure, the system is OK at this time. If the tester indicates NOT COMPLETE, return to Step 4 and recheck.■
Turn the ignition switch OFF. Jump the SCS line with the HDS. Disconnect PCM connector A (31P) and input shaft (mainshaft) speed sensor connector. Check for continuity between PCM connector terminals A8 and body ground, and between A9 and body ground. Is there continuity?
YES | - | Go to Step 10 .
NO | - | Repair open in the wires between PCM connector terminals A8, A9, and ground (G101), or repair poor ground (G101), then go to Step 30 .
Connect PCM connector A (31P). Turn the ignition switch ON (II). |

Measure the voltage between input shaft (mainshaft) speed sensor connector terminal No. 1 and body ground. Is there about 5 V?
YES | - | Go to Step 13 .
NO | - | Go to Step 24 .
Turn the ignition switch OFF. Disconnect PCM connector C (22P). |

Check for continuity between input shaft (mainshaft) speed sensor connector terminal No. 2 and body ground. Is there continuity?
YES | - | Repair short to ground in the wire between PCM connector terminal C19 and input shaft (mainshaft) speed sensor, then go to Step 30 .
NO | - | Go to Step 16 .

Check for continuity between input shaft (mainshaft) speed sensor connector terminal No. 3 and body ground. Is there continuity?
YES | - | Go to Step 17 .
NO | - | Repair open in the wire between the input shaft (mainshaft) speed sensor connector and ground (G101), then go to Step 30 .
Connect PCM connector C (22P). Turn the ignition switch ON (II). |

Measure the voltage between input shaft (mainshaft) speed sensor connector terminals No. 2 and No. 3. Is there about 5 V?
YES | - | Go to Step 20 .
NO | - | Go to Step 29 .
Connect the input shaft (mainshaft) speed sensor connector. |

Measure the voltage between PCM connector terminals C19 and A8 or A9. Is the voltage 0 V or about 5 V?
YES | - | Go to Step 22 .
NO | - | Replace the input shaft (mainshaft) speed sensor, then go to Step 30 .
Shift to the P position. Start the engine, and let it idle. |

With the engine idling, measure the voltage between PCM connector terminals C19 and A8 or A9. Is there 1.5−3.5 V?
YES | - | Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If the symptom/indication goes away with a known-good PCM, replace the original PCM .■
NO | - | Replace the input shaft (mainshaft) speed sensor, then go to Step 30 .

Measure the voltage between PCM connector terminals A21 and A8 or A9. Is there 4.75−5.25 V?
YES | - | Repair open in the wire between PCM connector terminal A21 and the input shaft (mainshaft) speed sensor connector, then go to Step 30 .
NO | - | Go to Step 25 .
Turn the ignition switch OFF. Jump the SCS line with the HDS. Disconnect PCM connector A (31P). |

Check for continuity between PCM connector terminal A21 and body ground. Is there continuity?
YES | - | Repair short to ground in the wire between PCM connector terminal A21 and the input shaft (mainshaft) speed sensor connector, then go to Step 30 .
NO | - | Check for loose or poor connections at PCM connector terminal A21. If the connection is OK, update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If the symptom/indication goes away with a known-good PCM, replace the original PCM .■

Measure the voltage between PCM connector terminals C19 and A8 or A9. Is there about 5 V?
YES | - | Repair open in the wire between PCM connector terminal C19 and the input shaft (mainshaft) speed sensor connector, then go to Step 30 .
NO | - | Check for loose or poor connections at PCM connector terminal C19. If the connection is OK, update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If the symptom/indication goes away with a known-good PCM, replace the original PCM .■
Clear the DTC with the HDS. Test-drive the vehicle for several minutes under the same conditions as those indicated by the freeze data. Monitor the OBD status for P0716 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail. Does the result pass?
YES | - | The problem has been corrected.■
NO | - | Return to Step 1 and recheck.■