Paccar

Reason:
Transmission Output Shaft Speed – Abnormal Update Rate. No communication or an invalid data transfer rate has been detected on the J1939 data link between the ECM and the transmission output shaft speed sensor.

Effect:
None on performance

Circuit Description:
Normally, switches, accelerators, and other components are connected to the engine control module (ECM) directly through individual wires. Multiplexing allows those same components to be hard wired to an original equipment manufacturer (OEM) vehicle electronic control unit (VECU) or transmission electronic control unit (ECU) in the cab. Then component values and states from components such as sensors, accelerators, and switches can be transmitted from the OEM VECU to the Cummins® ECM over the SAE J1939 data link.

Messages sent from OEM VECUs or transmission ECUs are received by the Cummins® ECM and used for controlling the engine. The Cummins® ECM and OEM VECU(s) must be configured properly, so that proper operation of the multiplexed components will occur.

Component Location:
The SAE J1939 data link wiring and the SAE J1939 devices vary by OEM options.

Conditions for Running the Diagnostics:
This diagnostic runs continuously when the keyswitch is in the ON position or when the engine is running.

Conditions for Setting the Fault Codes:
The Engine Control Module (ECM) did not receive a message from a multiplexed device.

Action Taken When the Fault Code is Active:
The ECM illuminates the amber CHECK ENGINE lamp and/or the Malfunction Indicator Lamp (MIL) immediately when the diagnostic runs and fails.

Conditions for Clearing the Fault Code:
1) To validate the repair, perform a key cycle, start the engine and let it idle for 1 minute.
2) The fault code status displayed by INSITE™ electronic service tool will change to INACTIVE immediately after the diagnostic runs and passes.
3) The ECM will turn off the amber CHECK ENGINE lamp immediately after the diagnostic runs and passes.
4) For On-Board Diagnostics (OBD) engines, the ECM will extinguish the Malfunction Indicator Lamp (MIL) after three consecutive trips where the diagnostic runs and passes.
5) The Reset All Faults command in INSITE™ electronic service tool can be used to clear active and inactive faults, as well as extinguish the MIL for OBD applications.

Shop Talk:
When this fault code is active, some multiplexed devices may not function as desired. This fault can occur for the following reasons:
1) When the ECM is set up properly (components enabled and OEM VECU source addressed correctly) to receive information from an OEM VECU, but the OEM VECU is actually transmitting a message that says that component is not available for multiplexing. This can be caused when a multiplexed component is enabled in the Cummins® ECM, but the OEM VECU source address of the VECU transmitting the component message is incorrect in the Cummins® ECM, or the OEM VECU is not set up to transmit the multiplexed component message.
2) This fault can also be caused by a bad J1939 data link connection between the OEM VECU and Cummins® ECM, a bad connection between the component and the OEM VECU, bad OEM VECU or bad Cummins® ECM. It may be necessary to contact the OEM for proper multiplexing configuration.

It is possible to use INSITE™ electronic service tool to monitor multiplexed components.

Reference the appropriate OEM wiring diagram when troubleshooting circuits that utilize wiring supplied by the OEM.

Possible Causes:
1) Faulty ECM
2) Inactive fault codes

Reason:
Engine Coolant Temperature – Data Erratic Intermittent or Incorrect. The engine coolant temperature sensor is reading an erratic value at initial key ON.

Effect:
None on performance.

Circuit Description:
The coolant temperature sensor is a variable resistor sensor and is used to measure the temperature of the coolant of the engine. The engine control module (ECM) supplies 5 volts to the coolant temperature signal circuit. The ECM monitors the change in voltage caused by changes in the resistance of the sensor to determine the coolant temperature.

Component Location:
The engine coolant temperature sensor is located on the thermostat housing.

Conditions for Running the Diagnostics:
The engine must be turned OFF for period of 8 hours before this diagnostic will run. This diagnostic runs when the keyswitch is turned to the ON position after an 8 hour cold soak.

Conditions for Setting the Fault Codes:
The Engine Control Module (ECM) detected the engine coolant temperature was greater than other engine temperature sensors by a calibratable value.

Action Taken When the Fault Code is Active:
1) The ECM illuminates the amber CHECK ENGINE lamp and/or Malfunction Indicator Lamp (MIL) after the diagnostic fails on two consecutive trips.
2) A default value is used for the engine coolant temperature reading.

Conditions for Clearing the Fault Code:
1) To validate the repair, the engine must be shut down with the keyswitch in the OFF position for 8 hours. After the 8 hour cold soak, start the engine and let it idle for 1 minute.
2) The fault code status displayed by INSITE™ electronic service tool will change to INACTIVE immediately after the diagnostic runs and passes.
3) The ECM will turn off the amber CHECK ENGINE lamp immediately after the diagnostic runs and passes.
4) For On-Board Diagnostics (OBD) engines, the ECM will extinguish the Malfunction Indicator Lamp (MIL) after three consecutive trips where the diagnostic runs and passes.
5) The Reset All Faults command in INSITE™ electronic service tool can be used to clear active and inactive faults, as well as extinguish the MIL for OBD applications.

Shop Talk:
N/A

Possible causes of this fault code include:
1) In-range malfunction of the engine coolant temperature sensor
2) High resistance in the engine coolant temperature sensor signal or return lines.

Reason:
Engine Air Filter Differential Pressure – Data Valid But Above Normal Operating Range – Moderately Severe Level

Effect:
Possible reduced engine performance.

Circuit Description:
The Engine Control Module (ECM) calculates the restriction across the air filter using sensors within the air management system.

Component Location:
Not Applicable

Conditions for Running the Diagnostics:
This diagnostic runs continuously when the engine is running.

Conditions for Setting the Fault Codes:
The Engine Control Module (ECM) detected the compressor intake air restriction is above a calibratible value.

Action Taken When the Fault Code is Active:
1) The ECM illuminates the amber CHECK ENGINE lamp immediately when the diagnostic runs and fails.
2) Engine torque will be reduced if the engine is operated for an extended period of time with this fault active.

Conditions for Clearing the Fault Code:
1) To validate the repair, perform a key cycle, start the engine and let it idle for 1 minute.
2) The ECM will turn off the amber CHECK ENGINE lamp immediately after the diagnostic runs and passes.
3) The fault code status displayed by INSITE™ electronic service tool will change to INACTIVE immediately after the diagnostic runs and passes.
4) The Reset All Faults command in INSITE™ electronic service tool can be used to clear active and inactive faults.

Shop Talk:
Plugged or highly restricted air filter can also possibly cause this fault to become active, especially at higher altitudes.

Possible Causes:
1) Inactive fault codes
2) Damaged air filter
3) Faulty ECM

Reason:
Engine Air Filter Differential Pressure – Data Valid But Above Normal Operating Range – Moderately Severe Level

Effect:
Possible reduced engine performance.

Circuit Description:
The Engine Control Module (ECM) calculates the restriction across the air filter using sensors within the air management system.

Component Location:
Not Applicable

Conditions for Running the Diagnostics:
This diagnostic runs continuously when the engine is running.

Conditions for Setting the Fault Codes:
The Engine Control Module (ECM) detected the compressor intake air restriction is above a calibratible value.

Action Taken When the Fault Code is Active:
1) The ECM illuminates the amber CHECK ENGINE lamp immediately when the diagnostic runs and fails.
2) Engine torque will be reduced if the engine is operated for an extended period of time with this fault active.

Conditions for Clearing the Fault Code:
1) To validate the repair, perform a key cycle, start the engine and let it idle for 1 minute.
2) The ECM will turn off the amber CHECK ENGINE lamp immediately after the diagnostic runs and passes.
3) The fault code status displayed by INSITE™ electronic service tool will change to INACTIVE immediately after the diagnostic runs and passes.
4) The Reset All Faults command in INSITE™ electronic service tool can be used to clear active and inactive faults.

Shop Talk:
Plugged or highly restricted air filter can also possibly cause this fault to become active, especially at higher altitudes.

Possible Causes:
1) Inactive fault codes
2) Damaged air filter
3) Faulty ECM

Reason:
Aftertreatment Diesel Particulate Filter Regeneration too Frequent – Condition Exists. The system has detected the need for an active regeneration has occurred too soon following the last active regeneration.

Effect:
None on performance.

Circuit Description:
The ECM records the time from the completion of an active regeneration of the aftertreatment diesel particulate filter until the ECM request another active regeneration of the diesel particulate filter.

Component Location:
The aftertreatment diesel particulate filter is located in the exhaust system and is installed by the original equipment manufacturer (OEM). Refer to the OEM service manual.

Conditions for Running the Diagnostics:
This diagnostic only runs after successful completion of an active regeneration of the aftertreatment diesel particulate filter.

Conditions for Setting the Fault Codes:
The time between the completion of a successful active regeneration and the requests for another active regeneration was less than a threshold.

Action Taken When the Fault Code is Active:
The ECM illuminates the amber CHECK ENGINE lamp and/or the Malfunction Indicator Lamp (MIL) immediately when the diagnostic runs and fails.

Conditions for Clearing the Fault Code:
1) This diagnostic can not be run in the shop enviornment.
2) To validate the repair, start the engine and perform the INSITE™ electronic service tool Aftertreatment Diesel Particulate Filter Regeneration Test.
3) It is necessary to use the “Reset All Faults” command in INSITE™ electronic service tool to clear this fault and extinguish the amber CHECK ENGINE lamp and/or Malfunction Indicator Lamp (MIL).

Shop Talk:
N/A

Possible Causes:
1) A malfunctioning aftertreatment fuel injector
2) A face plugged aftertreatment diesel oxidation catalyst
3) A malfunctioning aftertreatment diesel particulate filter differential pressure sensor
4) An engine malfunction resulting in high engine out soot

Reason:
Aftertreatment Diesel Particulate Filter Regeneration too Frequent – Condition Exists. The system has detected the need for an active regeneration has occurred too soon following the last active regeneration.

Effect:
None on performance.

Circuit Description:
The ECM records the time from the completion of an active regeneration of the aftertreatment diesel particulate filter until the ECM request another active regeneration of the diesel particulate filter.

Component Location:
The aftertreatment diesel particulate filter is located in the exhaust system and is installed by the original equipment manufacturer (OEM). Refer to the OEM service manual.

Conditions for Running the Diagnostics:
This diagnostic only runs after successful completion of an active regeneration of the aftertreatment diesel particulate filter.

Conditions for Setting the Fault Codes:
The time between the completion of a successful active regeneration and the requests for another active regeneration was less than a threshold.

Action Taken When the Fault Code is Active:
The ECM illuminates the amber CHECK ENGINE lamp and/or the Malfunction Indicator Lamp (MIL) immediately when the diagnostic runs and fails.

Conditions for Clearing the Fault Code:
1) This diagnostic can not be run in the shop enviornment.
2) To validate the repair, start the engine and perform the INSITE™ electronic service tool Aftertreatment Diesel Particulate Filter Regeneration Test.
3) It is necessary to use the “Reset All Faults” command in INSITE™ electronic service tool to clear this fault and extinguish the amber CHECK ENGINE lamp and/or Malfunction Indicator Lamp (MIL).

Shop Talk:
N/A

Possible Causes:
1) A malfunctioning aftertreatment fuel injector
2) A face plugged aftertreatment diesel oxidation catalyst
3) A malfunctioning aftertreatment diesel particulate filter differential pressure sensor
4) An engine malfunction resulting in high engine out soot

Reason:
Aftertreatment Diesel Particulate Filter Incomplete Regeneration – Condition Exists. The system has detected that the aftertreatment diesel particulate filter differential pressure is too high following an active regeneration.

Effect:
Possible frequent need for aftertreatment regeneration.

Circuit Description:
The engine aftertreatment system monitors the soot load in the aftertreatment diesel particulate filter. Under normal operating conditions, the aftertreatment diesel particulate filter is self-cleaning, where soot is converted to carbon dioxide, nitrogen, and water. Under light load operating conditions, it can be necessary to perform a stationary regeneration of the aftertreatment diesel particulate filter. The soot load in the aftertreatment diesel particulate filter is estimated, using the aftertreatment differential pressure sensor and the calculated soot output of the engine.

Component Location:
The aftertreatment diesel particulate filter differential pressure sensor is mounted on the diesel particulate filter. It is a combination sensor that detects both diesel particulate filter differential pressure and outlet pressure. Refer to the original equipment manufacturer (OEM) service manual.

Conditions for Running the Diagnostics:
This diagnostic only runs after successful completion of an active regeneration of the aftertreatment diesel particulate filter.

Conditions for Setting the Fault Codes:
The estimated soot load in the aftertreatment diesel particulate filter was higher than a calibratible value.

Action Taken When the Fault Code is Active:
The ECM illuminates the amber CHECK ENGINE lamp and/or Malfunction Indicator Lamp (MIL) after the diagnostic fails on two consecutive trips.

Conditions for Clearing the Fault Code:
1) To validate the repair, start the engine and perform the INSITE™ electronic service tool Aftertreatment Diesel Particulate Filter Regeneration Test.
2) The fault code status displayed by INSITE™ electronic service tool will change to INACTIVE immediately after the diagnostic runs and passes.
3) For On-Board Diagnostics (OBD) engines, the ECM will extinguish the Malfunction Indicator Lamp (MIL) after three consecutive trips where the diagnostic runs and passes.
4) The Reset All Faults command in INSITE™ electronic service tool can be used to clear active and inactive faults, as well as extinguish the MIL for OBD applications.

Shop Talk:
N/A

Possible Causes:
1) A malfunctioning aftertreatment fuel injector
2) Malfunctioning aftertreatment temperature sensors
3) A malfunctioning aftertreatment diesel oxidation catalyst
4) A malfunctioning or stuck in-range aftertreatment diesel particulate filter differential pressure sensor
5) An engine malfunction resulting in high engine out smoke
6) A damaged or malfunctioning OEM wiring harness to the differential pressure sensor

Reason:
Aftertreatment Diesel Particulate Filter Incomplete Regeneration – Condition Exists. The system has detected that the aftertreatment diesel particulate filter differential pressure is too high following an active regeneration.

Effect:
Possible frequent need for aftertreatment regeneration.

Circuit Description:
The engine aftertreatment system monitors the soot load in the aftertreatment diesel particulate filter. Under normal operating conditions, the aftertreatment diesel particulate filter is self-cleaning, where soot is converted to carbon dioxide, nitrogen, and water. Under light load operating conditions, it can be necessary to perform a stationary regeneration of the aftertreatment diesel particulate filter. The soot load in the aftertreatment diesel particulate filter is estimated, using the aftertreatment differential pressure sensor and the calculated soot output of the engine.

Component Location:
The aftertreatment diesel particulate filter differential pressure sensor is mounted on the diesel particulate filter. It is a combination sensor that detects both diesel particulate filter differential pressure and outlet pressure. Refer to the original equipment manufacturer (OEM) service manual.

Conditions for Running the Diagnostics:
This diagnostic only runs after successful completion of an active regeneration of the aftertreatment diesel particulate filter.

Conditions for Setting the Fault Codes:
The estimated soot load in the aftertreatment diesel particulate filter was higher than a calibratible value.

Action Taken When the Fault Code is Active:
The ECM illuminates the amber CHECK ENGINE lamp and/or Malfunction Indicator Lamp (MIL) after the diagnostic fails on two consecutive trips.

Conditions for Clearing the Fault Code:
1) To validate the repair, start the engine and perform the INSITE™ electronic service tool Aftertreatment Diesel Particulate Filter Regeneration Test.
2) The fault code status displayed by INSITE™ electronic service tool will change to INACTIVE immediately after the diagnostic runs and passes.
3) For On-Board Diagnostics (OBD) engines, the ECM will extinguish the Malfunction Indicator Lamp (MIL) after three consecutive trips where the diagnostic runs and passes.
4) The Reset All Faults command in INSITE™ electronic service tool can be used to clear active and inactive faults, as well as extinguish the MIL for OBD applications.

Shop Talk:
N/A

Possible Causes:
1) A malfunctioning aftertreatment fuel injector
2) Malfunctioning aftertreatment temperature sensors
3) A malfunctioning aftertreatment diesel oxidation catalyst
4) A malfunctioning or stuck in-range aftertreatment diesel particulate filter differential pressure sensor
5) An engine malfunction resulting in high engine out smoke
6) A damaged or malfunctioning OEM wiring harness to the differential pressure sensor

Reason:
Idle Shutdown Vehicle Accessories Relay Driver Circuit – Voltage Above Normal, or Shorted to High Source. Open circuit or short to voltage source detected at the idle shutdown vehicle accessory/ignition bus relay circuit.

Effect:
Vehicle accessories or ignition bus loads controlled by the idle shutdown relay will not power up.

Circuit Description:
The Engine Control Module (ECM) Idle Shutdown feature has an optional parameter for a shutdown accessory relay. When this parameter is set to “Installed”, the ECM sends a signal to energize the relay and turn off vehicle accessories during idle shutdown events. The idle shutdown relay return circuit varies by Original Equipment Manufacturer (OEM). The return circuit can be returned to the ECM through the ECM Return (General) or connected directly to ground. Refer to the OEM service manual to determine grounding configuration.

Component Location:
The idle shutdown relay location varies by OEM. Refer to the OEM service manual to determine the location.

Conditions for Running the Diagnostics:
This diagnostic runs continuously when the keyswitch is in the ON position or when the engine is running.

Conditions for Setting the Fault Codes:
1) The Engine Control Module (ECM) detected the idle shutdown relay pulse width modulated (PWM) signal was at system voltage when the pulse width modulated (PWM) signal was Action Taken When the Fault Code is Active
2) The ECM illuminates the amber CHECK ENGINE lamp immediately when the diagnostic runs and fails.
3) The accessories controlled by the idle shutdown relay will be disabled.

Conditions for Clearing the Fault Code:
1) To validate the repair, perform a key cycle, start the engine and let it idle for 1 minute.
2) The fault code status displayed by INSITE™ electronic service tool will change to INACTIVE immediately after the diagnostic runs and passes.
3) The ECM will turn off the amber CHECK ENGINE lamp immediately after the diagnostic runs and passes.
4) The Reset All Faults command in INSITE™ electronic service tool can be used to clear active and inactive faults, as well as extinguish the MIL for OBD applications.

Shop Talk:
The ECM monitors the voltage level on this circuit. If it detects a voltage when the signal is commanded OFF, it records this fault code.

This fault code can be caused by:
1) ECM Idle Shutdown feature set up incorrectly.
2) Open circuit in the idle shutdown relay, OEM harness, or connectors.
3) Short circuit to a voltage source in the OEM harness or relay.

Reference the appropriate OEM wiring diagram when troubleshooting circuits that utilize wiring supplied by the OEM.

Possible Causes:
1) Inactive fault codes
2) Faulty ECM
3) Damaged relay and circuit