CAT

The Speed/Timing signal for Engine/Speed Timing Sensor #1 indicates rpm but the timing pattern is lost.

The ECM has been replaced and the Engine/Speed Timing Sensors have not been calibrated.

The Engine Control Module (ECM) detects one of the following items after attempting to operate the injector: •A low current condition (open circuit) exists in the wiring for the cylinder injector solenoid.•A high current condition (short circuit) exists in the injector solenoid. Probable Causes: 1) ECM Connection/Harness2) Cylinder injector failure3) Injector solenoid failure4) Harness from ECM to valve cover connector5) ECM failure6) Injector harness under valve cover

The Engine Control Module (ECM) detects the following conditions: •The primary speed/timing sensor and the secondary speed/timing sensor are off by more than three degrees.•A timing calibration has been successfully completed.•The battery voltage is above 9 V. The engine uses two engine speed/timing sensors. Both of the engine speed/timing sensors detect the reference for engine speed and timing from a unique pattern on the camshaft gear. The Engine Control Module (ECM) counts the time between pulses that is created by the sensor as the gear rotates in order to determine rpm. The ECM remembers the pattern of the pulses. The...

The Engine Control Module (ECM) detects the following conditions: •A timing calibration has never been performed on a new ECM or the timing is off by more than three degrees. The speed/timing sensors provide engine speed signals to the ECM. The signals are created as the timing gear on the camshaft rotates past the pickups of the engine speed/timing sensors. A unique pattern on the timing gear allows the ECM to determine the crankshaft position. This unique pattern on the gear allows the ECM to determine the top center position of the piston in the No. 1 cylinder. If the...