P0731

FOR ADDITIONAL INFORMATION NOT INCLUDED HERE, REFER TO TSB # 00-T-32 DATED May, 2000.




The Transmission Control Module (TCM) calculates gear ratio based on the transaxle input and output speeds. The TCM compares the known gear ratio to the calculated ratio for the selected range. When the TCM detects an unknown gear ratio when 1st gear is commanded, then the DTC P0731 sets. DTC P0731 is a type C DTC.

DTC PARAMETERS
- Engine is running
- TPS greater than 8%
- Trans fluid temperature between 21°C (70°F) and 130°C (266°F).
- Engine torque greater than 2 ft-lbs
- Commanded ratio = 1st gear
- No TPS, TFP VSS, ISS codes
- No engine torque default
- Time since last manual range change greater than 6 seconds
- TFP not in PARK or NEUTRAL
- Vehicle speed greater than 5 km/h (3 mph)

DIAGNOSTIC AIDS
- Check for improper transaxle operation per the chart.
- Check for an incorrect calibration.