Paccar

Reason:
Accelerator Pedal or Lever Idle Validation Switch – Received Network Data In Error. The J1939 multiplexing controller has indicated a malfunction of the accelerator pedal or lever idle validation switch

Effect:
Engine will only idle.

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 OEM VECU determined that there was a malfunction of the accelerator pedal or lever idle validation switch.

Action Taken When the Fault Code is Active:
The ECM illuminates the red STOP 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 red STOP 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:
The J1939 multiplexing controller has indicated a malfunction of the accelerator pedal or lever idle validation switch.

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

Reason:
Accelerator Pedal or Lever Idle Validation Switch – Abnormal Update Rate. No communication or an invalid data transfer rate has been detected on the J1939 data link between the ECM and the accelerator pedal or lever idle validation switch.

Effect:
Engine will only idle.

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 red STOP 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 can possibly not function as desired.
This fault can occur for the following reasons:
1) 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 damaged J1939 data link connection between the OEM VECU and Cummins® ECM, a malfunctioning connection between the component and the OEM VECU, damaged OEM VECU, or damaged Cummins® ECM. It may be necessary to contact the OEM for proper multiplexing configuration.

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

For intermittent power supply and datalink communication issues with Aftertreatment Components, it is highly recommended that the OEM Power Distribution Center fuses and relays be thoroughly checked for loose, missing or intermittent connections.

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

Reason:
Engine Intake Throttle Actuator Position Sensor Circuit – Voltage above normal, or shorted to high source. High signal voltage detected at the engine intake air throttle position sensor circuit.

Effect:
Possible reduced engine performance.

Circuit Description:
The engine control module (ECM) controls the engine intake air throttle actuator. The ECM can open and close the throttle based on the operating condtions in order to regulate air flow to the engine.

Component Location:
The engine intake air throttle actuator is mounted in the piping between the charge air cooler and intake manifold.

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) detected the engine intake air throttle position sensor circuit voltage was out of range high.

Action Taken When the Fault Code is Active:
1) The ECM illuminates the amber CHECK ENGINE lamp and/or the Malfunction Indicator Lamp (MIL) immediately when the diagnostic runs and fails.
2) Engine intake air throttle actuation will be disabled. The engine intake air throttle will default to the open position.
3) Exhaust Gas Recirculation (EGR) valve operation will be disabled.
4) 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 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:
1) A malfunctioning engine intake air throttle position sensor
2) A short circuit to battery in the engine harness
3) An open circuit in the engine harness

Reason:
Engine Intake Throttle Actuator Position Sensor Circuit – Voltage below normal, or shorted to low source. Low signal voltage detected at the engine intake air throttle position sensor circuit.

Effect:
Possible reduced engine performance

Circuit Description:
The engine control module (ECM) controls the engine intake air throttle actuator. The ECM can open and close the throttle based on the operating condtions in order to regulate air flow to the engine.

Component Location:
The engine intake air throttle actuator is mounted in the piping between the charge air cooler and intake manifold.

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) detected the engine intake air throttle position sensor circuit voltage was out of range low.

Action Taken When the Fault Code is Active:
1) The ECM illuminates the amber CHECK ENGINE lamp and/or the Malfunction Indicator Lamp (MIL) immediately when the diagnostic runs and fails.
2) Engine intake air throttle actuation will be disabled. The engine intake air throttle will default to the open position.
3) Exhaust Gas Recirculation (EGR) valve operation will be disabled.
4) 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 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:
1) A malfunctioning engine intake air throttle position sensor
2) A short circuit to ground in the engine harness
3) An open circuit in the engine harness

Reason:
NOx Limits Exceeded Due to Insufficient Reagent Quality – Condition Exists. The diesel exhaust fluid quality is not sufficient enough to provide adequate NOx reduction.

Effect:
Possible reduced engine performance.

Circuit Description:
The engine control module (ECM) monitors the NOx concentration in the engine’s exhaust gases using an aftertreatment intake NOx sensor and an aftertreatment outlet NOx sensor. By comparing these two values, the ECM is able to determine the conversion efficiency of the SCR catalyst and dosing system.

Component Location:
The SCR catalyst is located in the vehicle’s exhaust system, after the diesel particulate filter and decomposition tube.

Conditions for Running the Diagnostics:
This diagnostic runs after the diesel exhaust fluid tank has been refilled. Specific engine and aftertreatment conditions must be met. NOx sensor data is gathered over varying engine speeds and loads. When enough data has been gathered, the diagnostic will run, make a pass/fail decision, and begin to gather data again.

Conditions for Setting the Fault Codes:
The Engine Control Module (ECM) detected the NOx conversion across the SCR catalyst was less than expected, and the diesel exhaust fluid tank has recently been refilled.

Action Taken When the Fault Code is Active:
1) The ECM illuminates the amber CHECK ENGINE lamp and/or the Malfunction Indicator Lamp (MIL) immediately when the diagnostic runs and fails.
2) Engine torque will be severely reduced.

Conditions for Clearing the Fault Code:
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:
Troubleshoot all other active NOx sensor and SCR dosing system related fault codes before this fault.

Possible Causes:
1) Malfunctioning diesel exhaust fluid dosing system
2) Exhaust system leaks
3) Malfunctioning SCR catalyst
4) Degraded, diluted, or incorrect diesel exhaust fluid
5) Diesel exhaust fluid deposits in the decomposition tube

Reason:
NOx Limits Exceeded Due to Insufficient Reagent Quality – Condition Exists. The diesel exhaust fluid quality is not sufficient enough to provide adequate NOx reduction.

Effect:
Possible reduced engine performance.

Circuit Description:
The engine control module (ECM) monitors the NOx concentration in the engine’s exhaust gases using an aftertreatment intake NOx sensor and an aftertreatment outlet NOx sensor. By comparing these two values, the ECM is able to determine the conversion efficiency of the SCR catalyst and dosing system.

Component Location:
The SCR catalyst is located in the vehicle’s exhaust system, after the diesel particulate filter and decomposition tube.

Conditions for Running the Diagnostics:
This diagnostic runs after the diesel exhaust fluid tank has been refilled. Specific engine and aftertreatment conditions must be met. NOx sensor data is gathered over varying engine speeds and loads. When enough data has been gathered, the diagnostic will run, make a pass/fail decision, and begin to gather data again.

Conditions for Setting the Fault Codes:
The Engine Control Module (ECM) detected the NOx conversion across the SCR catalyst was less than expected, and the diesel exhaust fluid tank has recently been refilled.

Action Taken When the Fault Code is Active:
1) The ECM illuminates the amber CHECK ENGINE lamp and/or the Malfunction Indicator Lamp (MIL) immediately when the diagnostic runs and fails.
2) Engine torque will be severely reduced.

Conditions for Clearing the Fault Code:
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:
Troubleshoot all other active NOx sensor and SCR dosing system related fault codes before this fault.

Possible Causes:
1) Malfunctioning diesel exhaust fluid dosing system
2) Exhaust system leaks
3) Malfunctioning SCR catalyst
4) Degraded, diluted, or incorrect diesel exhaust fluid
5) Diesel exhaust fluid deposits in the decomposition tube

Reason:
Aftertreatment Outlet NOx Sensor Circuit – Abnormal Rate of Change. The aftertreatment outlet NOx sensor reading is not valid.

Effect:
None on performance.

Circuit Description:
The aftertreatment outlet NOx (nitrogen oxides) sensor is a smart device and communicates with the engine control module (ECM) via the J1939 data link. The aftertreatment outlet NOx sensor performs its own internal diagnostics and reports malfunctions back to the primary ECM using the J1939 data link. The NOx sensor is permanently attached to the NOx control module. They are serviced as a single component and can not be replaced individually. The aftertreatment outlet NOx sensor is used to measure the NOx emissions at the outlet of the aftertreatment system.

Component Location:
The aftertreatment outlet NOx sensor location can vary depending on engine application. It is usually located in the exhaust system at the outlet of the selective catalytic reduction (SCR) catalyst.

Conditions for Running the Diagnostics:
This diagnostic runs when the aftertreatment SCR outlet temperature has been above 200°C [392° F] for a calibratible period of time while the engine is running.

Conditions for Setting the Fault Codes:
The aftertreatment outlet NOx sensor reading was not valid.

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, start and operate the engine to raise exhaust temperatures. This can be done by either driving the vehicle or initiating a stationary regeneration using INSITE™ electronic service tool.
2) The aftertreatment SCR outlet temperature must be above 200° C [392° F] for 60 seconds before the aftertreatment outlet NOx sensor can run its internal diagnostics.
3) The fault code status displayed by INSITE™ electronic service tool will change to INACTIVE immediately after the diagnostic runs and passes.
4) The ECM will turn off the amber CHECK ENGINE lamp immediately after the diagnostic runs and passes.
5) 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.
6) 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:
This fault code sets when the aftertreatment outlet NOx sensor indicates to the ECM that it is not providing valid data.

Troubleshoot the aftertreatment outlet NOx sensor for Fault Codes 1887, 2771, or 3682 before troubleshooting this fault code

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

For intermittent power supply and datalink communication issues with Aftertreatment Components, it is highly recommended that the OEM Power Distribution Center fuses and relays be thoroughly checked for loose, missing or intermittent connections.

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

Reason:
Aftertreatment Diesel Exhaust Fluid Tank Empty – Condition Exists. The diesel exhaust fluid tank is empty.

Effect:
Possible reduced engine performance

Circuit Description:
The aftertreatment diesel exhaust fluid level sensor is used to monitor the diesel exhaust fluid level inside the diesel exhaust fluid tank.

Component Location:
The aftertreatment diesel exhaust fluid tank level sensor is located in the aftertreatment diesel exhaust fluid tank. Location of the tank and level sensor is OEM dependent. Refer to the OEM service manual.

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 diesel exhaust fluid tank was empty and the dosing unit was unable to prime.

Action Taken When the Fault Code is Active:
There are two levels of action taken by the ECM when this fault code is active:

Level 1: Action taken when the diesel exhaust fluid tank is empty:
1) The ECM illuminates the amber CHECK ENGINE lamp and/or the Malfunction Indicator Lamp (MIL) immediately when the diagnostic runs and fails.
2) The Diesel Exhaust Fluid Lamp will be flashing.
3) Diesel exhaust fluid injection into the aftertreatment system is disabled.
4) Engine torque will be severely reduced.

Level 2: Action taken when the diesel exhaust fluid tank is empty and engine shutdown or extended idle.
1) The ECM illuminates the amber CHECK ENGINE lamp and/or the Malfunction Indicator Lamp (MIL) immediately when the diagnostic runs and fails.
2) The Diesel Exhaust Fluid Lamp will be flashing.
3) Engine torque will be severely reduced.
4) Vehicle speed will be limited to 8 km [5 mi] per hour.

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 diesel exhaust fluid lamp immediately after the diagnostic runs and passes.
4) The ECM will turn off the amber CHECK ENGINE lamp immediately after 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:
This fault code indicates that the aftertreatment diesel exhaust fluid tank is empty and needs refilled immediately.

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

Reason:
Aftertreatment Diesel Exhaust Fluid Tank Empty – Condition Exists. The diesel exhaust fluid tank is empty.

Effect:
Possible reduced engine performance

Circuit Description:
The aftertreatment diesel exhaust fluid level sensor is used to monitor the diesel exhaust fluid level inside the diesel exhaust fluid tank.

Component Location:
The aftertreatment diesel exhaust fluid tank level sensor is located in the aftertreatment diesel exhaust fluid tank. Location of the tank and level sensor is OEM dependent. Refer to the OEM service manual.

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 diesel exhaust fluid tank was empty and the dosing unit was unable to prime.

Action Taken When the Fault Code is Active:
There are two levels of action taken by the ECM when this fault code is active:

Level 1: Action taken when the diesel exhaust fluid tank is empty:
1) The ECM illuminates the amber CHECK ENGINE lamp and/or the Malfunction Indicator Lamp (MIL) immediately when the diagnostic runs and fails.
2) The Diesel Exhaust Fluid Lamp will be flashing.
3) Diesel exhaust fluid injection into the aftertreatment system is disabled.
4) Engine torque will be severely reduced.

Level 2: Action taken when the diesel exhaust fluid tank is empty and engine shutdown or extended idle.
1) The ECM illuminates the amber CHECK ENGINE lamp and/or the Malfunction Indicator Lamp (MIL) immediately when the diagnostic runs and fails.
2) The Diesel Exhaust Fluid Lamp will be flashing.
3) Engine torque will be severely reduced.
4) Vehicle speed will be limited to 8 km [5 mi] per hour.

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 diesel exhaust fluid lamp immediately after the diagnostic runs and passes.
4) The ECM will turn off the amber CHECK ENGINE lamp immediately after 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:
This fault code indicates that the aftertreatment diesel exhaust fluid tank is empty and needs refilled immediately.

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