COMPUSHIFT Mini Manual – COMPUSHIFT Mini Manual
Installing the COMPUSHIFT Mini
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CAL GOOD
Without pressing the "select" button, move the TV cable though its range of motion slowly.
If the calibration has been performed properly, "CAL GOOD" should remain on the screen.
If not, and "CAL BAD" shows up, you will need to carefully repeat the calibration process.
Once the throttle position sensor has been successfully calibrated, you should be ready to drive.
2.6.3 Diagnosing Problems with TPS Calibration
Here a few common calibration problems and recommendations on how to solve them.
If the transmission does not have proper line pressure variation, the calibration may fail. A pressure
variation (from least to most) of at least 90 lbs is needed. This corresponds to about 1.25 volts in pressure
sensor output.
The line pressure sensor must be screwed into the line pressure test port, not a clutch or accumulator test
port.
If the TV cable is not moved through its entire range, the pressure change will not be enough, and the
calibration can fail. Be sure that the TV cable can move freely.
In some circumstances, a low engine idle speed will prevent the transmission pump from developing full line
pressure during calibration. Running the calibration with the engine on a fast idle or at 1000 RPM may
resolve this.
2.7 Throttle Position Sensor Calibration (Chrysler)
2.7.1 Introduction
The COMPUSHIFT Mini needs an accurate throttle position sensor signal in order to operate properly.
2.7.2 Calibration Procedure
Begin by starting the vehicle in park. Let the engine run long enough for it to come off the the fast idle or choke
setting. This ensures that at idle the throttle is in the fully closed position.
Turn the engine off, but then turn the ignition switch back on so that the engine is ready to start, but not running.
Using the arrow keys, navigate to the throttle position sensor calibration screen on the COMPUSHIFT Mini as shown:
TPS CAL
Press the "select" key. The display shows the current calibration status. This will read out as either:
CAL BAD
or
CAL GOOD
Put SAFETY FIRST. You should not attempt the throttle sensor calibration unless you are thoroughly
familiar with working around engines.