DTC P0726 P0727 ENGINE SPEED SENSOR CIRCUIT PERFORMANCE_NO SIGNAL
- DTC P0727 Engine Speed Sensor Circuit No Signal
- DTC P0726 Engine Speed Sensor Circuit Performance
- Using ALLISON DOC Software, measure ignition voltage; 9-18V (12V TCM), 18-32V (24V TCM), Is voltage within specified values? If NO, resolve voltage problems refer to DTC P0882 and P0883.
- Disconnect the 80-way connector at the TCM, measure resistance between terminal 39 and 59.
- Disconnect the wiring harness from the output Speed Sensor, measure the resistance between the Speed Sensor terminal.
- Is the Speed Sensor resistance within the specified values?
- Replace the Speed Sensor
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