For 1990-2009 cars

### Circuit Description

The transaxle 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 commanded gear. When the TCM detects an unknown gear ratio when 4th gear is commanded DTC P0734 sets.

### Conditions for Setting the DTC

DTC P0734 will set if one of the following ratios is detected for:

• | TP Angle is greater than 8%

• | Engine is running

• | Trans. Fluid Temp is between 21°C (70°F) and 130°C (266°F)

• | Engine torque greater than 2 ft-lbs

• | Commanded ratio = 4th gear

• | No engine torque default

• | Time since last manual range change greater than 6 seconds

• | Vehicle Speed is greater than 5 km/h (3 mph)

• | TFP Range is not Park/Neutral

• | No TP Angle DTCs have set

DTC P0734 is a type C DTC.

### Diagnostic Aids

• | Check for improper transaxle operation per the chart on facing page.

• | Check for an incorrect calibration.