CAT

This condition indicates that the battery circuit to the Engine Control Module (ECM) has a low voltage condition while the engine is running. If battery voltage disappears without returning, the ECM will not log this diagnostic code and the engine will shut down.

The ECM detects the following conditions:

•The engine control is in the ON mode.
•The engine is not cranking.
•The engine is running.
•The ECM has been powered for at least three seconds.

The ECM also detects the following conditions:

•Battery voltage to the ECM is below 9 V for 12 V systems for more than 0.5 seconds.
•Battery voltage to the ECM is below 18 V for a 24 V system for more than 0.5 seconds.

Probable Causes:

1) Aftermarket device preventing battery voltage from getting to ECM
2) Problem with wiring between ECM and battery
3) Low voltage battery or failed charging system
4) Keyswitch issue or wiring from keyswitch to ECM or battery
5) ECM Failure

This condition indicates that the battery circuit to the Engine Control Module (ECM) has a battery condition that is intermittent while the engine is running. If battery voltage disappears without returning, the ECM will not log this diagnostic code and the engine will shut down.

The ECM detects the following conditions:

•The ignition key switch is in the ON position.
•The engine is running.
•The engine is not cranking.
•The ECM has been powered for at least three seconds.

The ECM will detect one of the following conditions:

•The battery voltage drops below 6 VDC for at least 0.50 seconds.
•Three voltage readings in the past seven seconds were below 6 VDC.

Probable Causes:

1) Aftermarket device preventing battery voltage from getting to ECM
2) Problem with wiring between ECM and battery
3) Low voltage battery or failed charging system
4) Keyswitch issue or wiring from keyswitch to ECM or battery
5) ECM Failure

All of the following conditions must be met.

•The parameter “PTO Configuraton” is programmed to “Cab Switches”, “Remote Switches”, or “Remote Throttle”.
•The PTO switch is on the ON position.
•The parameter “PTO Engine Shutdown Switch” is programmed to “J1/P1:7” or “J1/P1:23”.
•The PTO engine shutdown switch is off and the PTO switch is active for 0.5 seconds.
•The PTO engine shutdown switch changes condition for 0.5 seconds.

If the vehicle speed is not equal to zero, or if there are active vehicle speed faults, the engine will go to low idle. The engine will not shut down when the vehicle speed falls to zero. When the PTO engine shutdown switch is pressed, a 186-14 will become active. The code will stay active until the engine shuts down. When the engine shuts down, the code will be logged.

Possible Causes:

1) ECM Connection/Harness
2) PTO Shutdown Switch Failure
3) ECM Failure
4) Wiring between PTO shutdown switch and ECM

The Ecm detects one of the following after attempting to actuacte the injector solenoid: – An open circuit in the injector wiring. – An internal open circuit in the injector solenoid.

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/Harness
2) Cylinder injector failure
3) Injector solenoid failure
4) Harness from ECM to valve cover connector
5) ECM failure
6) 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 ECM uses the pattern of the pulses in order to determine the position of the crankshaft.

When the timing has been established, the ECM triggers each injector in the correct firing order at the correct time.

The actual timing and duration of each injection is based on engine rpm and on load. If the engine is running and the signal from one of the camshaft position sensors is lost, no noticeable change in engine performance will be noticed.

The engine will start and the engine will run when only one sensor signal is present from either of the sensors. The loss of the signal from both of the sensors during engine operation will result in the termination of injection and the shutting down the engine by the ECM. The loss of the signal from both of the sensors during start-up will prevent the engine from starting.

Both sensors are magnetic sensors. The two sensors are not interchangeable. Do not switch the positions of the sensors. The two sensors must be replaced as a pair. If the sensors are replaced, a timing calibration is not necessary for the engine. Timing calibration is only necessary after replacing an ECM that will not communicate.

Probable Causes:

1) ECM Connection
2) Engine speed sensor failure or installed improperly
3) Engine speed sensor harness
4) ECM Failure

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 signal is lost from one of the sensors, a diagnostic code is generated. The ECM will use a special type of logic that will allow the engine to start on only one sensor.

Timing calibration is accomplished by installing a special magnetic pickup into the side of the engine block. The magnetic pickup senses a special slot on the crankshaft counterweight.

Note: The timing calibration will not increase the available engine power. Do not expect an increase in power due to the performance of the timing calibration.

You can only calibrate this using the CAT ET Software.