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Home >> Jeep >> 2007 >> Compass Limited, AWD, Automatic CVT >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> (Continuously Variable Transmission (CVT) - Electrical Diagnostics) >> CVT - Electrical Diagnostics >> DTC Troubleshooting >> U1401-Implausible Engine Speed Signal Received >> Monitor Conditions

Monitor Conditions

  1. When Monitored: 

    Ignition on with a system voltage between 9.0 and 16.0 volts.

    Time since last TRS change greater than 2.0 seconds.

    Condition one: 

    TCC ON/OFF in the ON position.

    No Active DTCs from the following:

  2. Lost Communication with ECM/PCM
  3. Step Motor
  4. TCC ON/OFF Solenoid
  5. Input or Output Speed Sensor

    Condition two: 

    No Active DTCs from the following:

  6. Lost Communication with ECM/PCM
  7. Step Motor
  1. Condition one: 

    All  the below conditions must be present for the period of 5 seconds for the DTC to set:

  2. Engine speed minus Input speed is greater than 1000 RPM for the period of 5 seconds.
  3. Engine speed minus Secondary speed estimated ratio is greater than 1000 RPM for the period of 5 seconds.
  4. Secondary speed multiplied by the estimated ratio minus the primary speed is less than 1000 RPM.

    Condition two: 

  1. Engine speed is less than 450 RPM and the Input speed is greater than or equal to 1000 RPM for the period of 20 msec.
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