P0727

DTC P0727: Problem in Engine RPM Signal Input Circuit (No Signal Input)
2005 Model

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.

1. Start the engine.
2. Check the ENGINE SPEED with the HDS in the data list.
Is the ENGINE SPEED 128 rpm or less?
YES- Go to step 3.
NO- intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the gauge assembly and TCM.
3. Check the tachometer in the gauge assembly operation.
Does the tachometer operate properly?
YES- Go to step 4.
NO- Replace the gauge assembly.
4. Turn the ignition switch OFF.
5. Disconnect TCM connector A (26P).
6. Disconnect ECM connector A (32P).





7. Check for continuity between TCM connector terminal A5 and ECM connector A19.
Is there continuity?
YES- Check for loose or poor connections at TCM connector terminal A5 and ECM connector terminal A19. If the connections are OK, substitute a known-good TCM, then recheck. If the symptom/indication goes away with a known-good TCM, replace the original TCM.
NO- Repair open in the wire between TCM connector terminal A5 and ECM connector terminal A19.