DTC P0727: Engine Speed Input Circuit No Signal
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P0727 - ENGINE SPEED INPUT CIRCUIT NO SIGNAL
| Description: | The transaxle control module (TCM) continuously monitors the clean tachometer output (CTO) circuit from the powertrain control module (PCM) for an engine speed signal. This DTC is set when if there is a CTO circuit concern. | ||
| Possible Causes: |
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| Diagnostic Aids: | The TCM PID ENGCTO should correspond to actual engine speed. If the PID displays 0 RPM when the engine is running, it indicates a CTO circuit concern. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| Vehicles that start | GO to PINPOINT TEST JH . | ||
| Vehicles that do not start | GO to PINPOINT TEST JD . | ||