DTC P0721 P0722 OUTPUT SPEED SENSOR CIRCUIT PERFORMANCE_NO SIGNAL

  • DTC P0722 Output Speed Sensor Circuit No Signal
  • DTC P0721 Output 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 40 and 60.

- 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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