CAT

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 ECM detects the following conditions:

•The intake manifold air temperature is greater than 109 °C (228 °F) for more than two seconds.
•The engine has been running for at least 30 seconds.
•The engine coolant temperature is above 99 °C (210 °F).

Probable Causes:

1) Engine coolant low
2) Debris/low air flow in the charge air cooler
3) Heavy load + high ambient air temperature

The Engine Control Module (ECM) detects the following conditions:

•The signal voltage from the atmospheric pressure sensor is greater than 4.9 VDC for more than 30 seconds.
•The ECM has been powered for at least two seconds.

The Engine Control Module (ECM) continuously creates a pull-up voltage on the signal wire for each sensor. The ECM uses this pull-up voltage in order to detect a problem in the signal circuit. When the ECM detects voltage that is above a threshold on the signal wire, the ECM activates a -3 diagnostic code. When the ECM detects voltage that is below a threshold on the signal wire, the ECM activates a -4 diagnostic code.

Note: When you check for a diagnostic code, be sure to wait at least 30 seconds.

The most likely cause of a code is a problem with an electrical connector or wiring. The least likely cause of a code is the ECM.

The following sensors are included in this code:

Fuel pressure sensor
Injection actuation pressure sensor
Barometric pressure sensor
Boost pressure sensor
Engine oil pressure sensor

Probable Causes:

1) ECM Connection
2) Sensor failure
3) Sensor harness/connector
4) ECM Failure

The Engine Control Module (ECM) detects the following conditions:

•The signal voltage from the atmospheric pressure sensor is less than 0.2 VDC for more than 30 seconds.
•The ECM has been powered for at least two seconds.
•The engine is not running or the engine has been running for more than ten seconds.

The Engine Control Module (ECM) continuously creates a pull-up voltage on the signal wire for each sensor. The ECM uses this pull-up voltage in order to detect a problem in the signal circuit. When the ECM detects voltage that is above a threshold on the signal wire, the ECM activates a -3 diagnostic code. When the ECM detects voltage that is below a threshold on the signal wire, the ECM activates a -4 diagnostic code.

Note: When you check for a diagnostic code, be sure to wait at least 30 seconds.

The most likely cause of a code is a problem with an electrical connector or wiring. The least likely cause of a code is the ECM.

The following sensors are included in this code:

Fuel pressure sensor
Injection actuation pressure sensor
Barometric pressure sensor
Boost pressure sensor
Engine oil pressure sensor

Probable Causes:

1) ECM Connection
2) Sensor failure
3) Sensor harness/connector
4) ECM Failure

The Boost Pressure signal voltage is below acceptable range.

The engine is running and status of Service Brake #1 Switch indicates the brake pedal has been depressed while Service Brake #2 Switch indicates the pdeal is released.

The engine is running and status of Service Brake #2 Switch indicates the brake has been depressed while Service Brake #1 Switch indicates the pedal is released.

The Engine Control Module (ECM) detects the following conditions:

•For C7 engines that are not in emergency vehicles, the engine coolant temperature is at least 108° C (226° F) for more than ten seconds.
•For C7 emergency vehicles and for C9 vehicles, the engine coolant temperature is at least 113° C (235° F) for more than ten seconds.
•For C9 emergency vehicles with automatic transmissions, the engine coolant temperature is at least 118° C (244° F) for more than ten seconds.
•The engine has been running for at least 30 seconds.

Note: This diagnostic code represents an event. This diagnostic code does not represent an electronic system fault.

Probable causes:

1) High ambient air temperature or high inlet air temperature
2) Low coolant level
3) Radiator failure or restiction in cooling system
4) Fault water temperature regulator
5) Faulty coolant temperature sensor or circuit
6) Excessive load

The Engine Control Module (ECM) detects the following conditions:

•For C7 engines that are not in emergency vehicles, the engine coolant temperature is at least 111° C (232° F) for more than four seconds.
•For C7 emergency vehicles and for C9 vehicles, the engine coolant temperature is at least 116° C (241° F) for more than four seconds.
•For C9 emergency vehicles with automatic transmissions, the engine coolant temperature is at least 121° C (250° F) for more than four seconds.
•The engine has been running more than 30 seconds.

Note: This diagnostic code represents a critical event. This diagnostic code does not represent an electronic system fault.

Possible Causes:

1) Low Coolant level
2) Wiring at either ther coolant level sensor, ECM, or in between
3) ECM Failure