CAT

Conditions Which Generate This Code:

This condition occurs when there is an open in the circuit for the “2-wire float sensor”. The “Coolant Level Sensor” parameter must be programmed to “2-wire Float Sensor” before this diagnostic code can occur. If the “Coolant Level Sensor” parameter is programmed to “2-pin switch “, or “4-pin” this diagnostic code is disabled.

The coolant level sensor is installed by the vehicle’s Original Equipment Manufacturer (OEM). This sensor is an optional sensor for “Engine Monitoring”. Engine monitoring is a programmable feature of the Caterpillar Engine Control Module (ECM). The sensor is selectable through a customer programmable parameter and the customer programmable parameter may be protected by customer passwords. Some OEM installed coolant level sensors are not connected to the ECM. Do not confuse an OEM installed coolant level sensor that is independent of engine monitoring with the coolant level sensor that is used for engine monitoring.

The customer programmable parameter for the coolant level sensor can be programmed to “4-Pin”, “2-wire float sensor”, or “2-pin switch”. Also, the customer programmable parameter for the coolant level sensor can be programmed to “NO” if the option for the coolant level sensor is not being used.

If the parameter “Coolant Level Sensor” is programmed to “NO”, the coolant level sensor is ignored by the ECM. Conversely, if the parameter is set, then a sensor must be installed. The coolant level is monitored by the engine monitoring system when the parameter “Coolant Level Sensor” is programmed to “4-Pin” or “2-wire float sensor”.

Probable Causes:

1) Coolant level sensor
2) Coolant level sensor harness/connector
3) ECM Connection
4) Wiring between ECM and coolant level sensor
5) ECM Failure

Conditions Which Generate This Code:

This condition occurs when there is a short in the circuit for the “2-wire float sensor”. The “Coolant Level Sensor” parameter must be programmed to “2-wire float sensor” before this diagnostic code can occur. If the “Coolant Level Sensor” parameter is programmed to “2-pin switch”, or “4-pin” this diagnostic code is disabled.

The coolant level sensor is installed by the vehicle’s Original Equipment Manufacturer (OEM). This sensor is an optional sensor for “Engine Monitoring”. Engine monitoring is a programmable feature of the Caterpillar Engine Control Module (ECM). The sensor is selectable through a customer programmable parameter and the customer programmable parameter may be protected by customer passwords. Some OEM installed coolant level sensors are not connected to the ECM. Do not confuse an OEM installed coolant level sensor that is independent of engine monitoring with the coolant level sensor that is used for engine monitoring.

The customer programmable parameter for the coolant level sensor can be programmed to “4-Pin”, “2-wire float sensor”, or “2-pin switch”. Also, the customer programmable parameter for the coolant level sensor can be programmed to “NO” if the option for the coolant level sensor is not being used.

If the parameter “Coolant Level Sensor” is programmed to “NO”, the coolant level sensor is ignored by the ECM. Conversely, if the parameter is set, then a sensor must be installed. The coolant level is monitored by the engine monitoring system when the parameter “Coolant Level Sensor” is programmed to “4-Pin” or “2-wire float sensor”.

Probable Causes:

1) Coolant level sensor
2) Coolant level sensor harness/connector
3) ECM Connection
4) Wiring between ECM and coolant level sensor
5) ECM Failure

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

The ECM detects the following condition:

•The Secondary Fuel Level signal voltage is above the acceptable range for more than 10 seconds.

The fuel level sensors are OEM installed components for the vehicle. The sensors are selectable through a customer programmable parameter and the customer programmable parameter may be protected by customer passwords.

Possible Causes:

1) Loose ECM Connection/Harness
2) Fuel level sensor failure
3) WIring between fuel level sensor & ECM

This diagnostic code is used only by GMT-560 applications.

The ECM detects the following:

•The Secondary Fuel Level signal voltage is below the acceptable range for more than 10 seconds.

The fuel level sensors are OEM installed components for the vehicle. The sensors are selectable through a customer programmable parameter and the customer programmable parameter may be protected by customer passwords.

Possible Causes:

1) Loose ECM Connection/Harness
2) Fuel level sensor failure
3) WIring between fuel level sensor & ECM

The acceleator pedal throttle position sensor supply voltage is higher than it should be.

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

•The injection actuation pressure is greater than 3 MPa (435 psi) for more than three seconds when the engine is off.
•The difference in the actual pressure and the desired pressure is greater than 2 MPa (290 psi) for more than ten seconds with the engine running.
•Actual rail pressure is between 11.0 MPa (1595.41 psi) and 17.4 MPa (2523.66 psi) for more than ten seconds.
•Sensor current changes more than 0.075 Amp and rail pressure changes less than 0.5 MPa (72.5 psi) with the engine on.
•The engine is not running and the ECM has been powered for at least four seconds.
•Cold mode is not active.
•Engine speed is 0 rpm for more than 3 seconds and the engine is not running.

The injection actuation pressure sensor measures the pressure of the oil in the high pressure oil manifold. The high pressure oil in the manifold is used to actuate the injectors and the high pressure oil is used to control the fuel injection pressure. Fuel injection pressure is based on inputs from the sensors. The inputs are used by the Engine Control Module (ECM) for calculating the fuel injection pressure. The ECM uses the reading from the injection actuation pressure sensor in order to control the operation of the injection actuation pressure control valve.

Probable Causes:

1) ECM Connection
2) Injection actuation pressure sensor
3) Injection actuation pressure sensor wiring/connection

Indicates the battery circuit to the ECM has either an intermittent or low battery condition while the engine is running. If battery voltage disappears without returning, the ECM will not log this diagnostic code and the engie will shut down

The customer parameter PTO configuration is programmed to remote throttle and the PTO On/Off switch is ON. The ECM is not receiving a correct PTO throttle signal