[SpudRider]

Diagnostic Process for Solving Typical Engine Problems

Diagnosis of engine problems is facilitated by using either an engine scan tool, or PCHUD software on a laptop computer.

Compatible Scan Tools for Delphi MT05 ECU

1. Delphi Scan Tool KF90121
2. ED100 Motorcycle Scan Tool

Connect the scan tool/computer to the diagnostic port, and check the system with the engine off. Check the following values.

ENGINE OFF VALUES

Throttle Position

The closed throttle position should read zero. The wide open throttle position should read 100. Throttle position values should smoothly transition from closed throttle, to the wide open throttle position.

Barometric Pressure

With the engine off, the barometric pressure should read the actual atmospheric pressure.

Battery Voltage

The battery voltage should normally read between 12.5 volts to 13.0 volts, with the engine off.

Coolant Temperature

With the engine off, the coolant temperature should read the value of the ambient air temperature. If the reading is different, recheck the reading after changing the coolant temperature sensor.

Intake Air Temperature

With the engine off, the intake air temperature should read the value of the ambient air temperature. If the reading is different, recheck the reading after changing the MAP/MAT sensor.

Desired Motor Step

With the engine off, the desired motor step should read 135. Otherwise, turn off the engine for 15 seconds, and recheck the value. If the value is still incorrect, recheck the value after changing the idle stepper motor.

Current Fault Code

The current fault code should be zero.

Historic Fault Code

The historic fault code should be zero.

Otherwise, clear the fault codes. If a fault code reappears after clearing the fault codes, fix the problem, or change the faulty component. Then recheck the fault codes.