Paccar

PACCAR PX-9 CM2350 (2013-17) Fault Code:2367 PID:SID 80 SPN:1073 FMI:3 Engine Brake Actuator Driver Output 2 Circuit – Voltage Above Normal or Shorted to High Source

Reason:
Engine Brake Actuator Driver Output 2 Circuit – Voltage Above Normal or Shorted to High Source. Open circuit or high voltage detected at the engine brake solenoid number 2 signal circuit.

Effect:
Possible reduce engine braking performance.

Circuit Description:
The engine control module (ECM) controls engine brakes on cylinders 4, 5, and 6 by sending a signal on the engine brake solenoid number 2 signal circuit. If an engine brake is installed, there will be a jumper harness from this connector to the engine brake pass-through connectors on the rocker lever housing.

Component Location:
The engine brake solenoids are located under the valve cover. The engine brake solenoids are controlled through the engine harness by the ECM.

Conditions for Running the Diagnostics:
This diagnostic runs when the keyswitch is in the ON position and when the pulse width modulated (PWM) device is getting energized or de-energized. In some cases, the diagnostics can also run at some fixed intervals.

Conditions for Setting the Fault Codes:
The Engine Control Module (ECM) detected the engine brake 2 pulse width modulated (PWM) signal was detected to be system voltage when the PWM signal was turned off.

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) The engine brake 2 circuit will be disabled.

Conditions for Clearing the Fault Code:
1) To validate the repair, drive the vehicle and operate the engine brakes. This will allow the diagnostic to run. If the fault code does not become active again, the repair has been validated.
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:
N/A

Possible Causes:
1) A short circuit to battery in the engine harness.
2) A malfunctioning engine brake solenoid

PACCAR PX-9 CM2350 (2013-17) Fault Code:2363 PID:SID 80 SPN:1073 FMI:4 Engine Brake Actuator Driver Output 2 Circuit – Voltage Below Normal or Shorted to Low Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:2357 PID:SID 146 SPN:2791 FMI:7 EGR Valve Control Circuit – Mechanical System Not Responding or Out of Adjustment
PACCAR PX-9 CM2350 (2013-17) Fault Code:2353 PID:SID 146 SPN:2791 FMI:6 EGR Valve Control Circuit – Current Above Normal or Grounded Circuit
PACCAR PX-9 CM2350 (2013-17) Fault Code:235 PID:111 SPN:111 FMI:1 Coolant Level – Data Valid But Below Normal Operating Range – Most Severe Level
PACCAR PX-9 CM2350 (2013-17) Fault Code:2349 PID:SID 146 SPN:2791 FMI:5 EGR Valve Control Circuit – Current Below Normal or Open Circuit
PACCAR PX-9 CM2350 (2013-17) Fault Code:2346 PID:SID 384 SPN:2789 FMI:15 Turbocharger Turbine Intake Temperature – Data Valid But Above Normal Operating Range – Least Severe Level

Leer más →

PACCAR PX-9 CM2350 (2013-17) Fault Code:237 PID:SID 30 SPN:644 FMI:2 External Speed Command Input (Multiple Unit Synchronization) – Data Erratic, Intermittent, or Incorrect

Reason:
Multiple Unit Synchronization Switch – Data Erratic, Intermittent, or Incorrect. Multiple unit synchronous ON/OFF switch and multiple unit synchronous

Effect:
The multiple unit synchronization feature will be disabled

Circuit Description:
The multiple unit synchronization feature uses an ON/OFF switch and a complementary switch. The complementary switch is used by the ECM to determine the type of coupling (hard or soft) to use between multiple engines when the multiple unit synchronization switch is engaged/installed by the OEM to support this feature.

Component Location:
The multiple unit synchronization switch is mounted by the OEM. Refer to the OEM manual for specific switch 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:
The Engine Control Module (ECM) detected the multiple unit synchronous ON/OFF switch and multiple unit synchronous complimentary ON/OFF switch have different values.

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) The multiple unit synchronization feature is disabled.

Conditions for Clearing the Fault Code:
1) To validate the repair, 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.

Shop Talk:
The multiple unit synchronization feature allows two or more engines to be controlled by a single throttle signal and run at a similar speed. There are three engine configurations available with this feature: soft coupled, hard-coupled, and soft-coupled marine. The soft-coupled configuration has all secondary engines in parallel with each other. The primary engine outputs a throttle signal to all secondary engines. This setup allows all engines to remain running, if a secondary engine stops.

Possible Causes:
1) Damaged pins
2) Open circuit
3) Short circuit to engine block ground
4) Faulty engine harness connector

PACCAR PX-9 CM2350 (2013-17) Fault Code:2367 PID:SID 80 SPN:1073 FMI:3 Engine Brake Actuator Driver Output 2 Circuit – Voltage Above Normal or Shorted to High Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:2363 PID:SID 80 SPN:1073 FMI:4 Engine Brake Actuator Driver Output 2 Circuit – Voltage Below Normal or Shorted to Low Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:2357 PID:SID 146 SPN:2791 FMI:7 EGR Valve Control Circuit – Mechanical System Not Responding or Out of Adjustment
PACCAR PX-9 CM2350 (2013-17) Fault Code:2353 PID:SID 146 SPN:2791 FMI:6 EGR Valve Control Circuit – Current Above Normal or Grounded Circuit
PACCAR PX-9 CM2350 (2013-17) Fault Code:235 PID:111 SPN:111 FMI:1 Coolant Level – Data Valid But Below Normal Operating Range – Most Severe Level
PACCAR PX-9 CM2350 (2013-17) Fault Code:2349 PID:SID 146 SPN:2791 FMI:5 EGR Valve Control Circuit – Current Below Normal or Open Circuit

Leer más →

PACCAR PX-9 CM2350 (2013-17) Fault Code:2372 PID:95 SPN:95 FMI:0 Fuel Filter Differential Pressure – Data Valid But Above Normal Operating Range – Moderately Severe Level

Reason:
Fuel Filter Differential Pressure – Data Valid But Above Normal Operational Range – Moderately Severe Level. Excessive fuel flow restriction to the high pressure fuel pump has been detected.

Effect:
Possible reduced engine performance.

Circuit Description:
The engine control module (ECM) monitors engine operating conditions, including the reading of fuel rail pressure, and changes the flow command to either increase (OPEN the fuel pump actuator) or decrease (CLOSE the fuel pump actuator) the fuel supply to the high-pressure pump.

Component Location:
There are two fuel filters and several original equipment manufacturer (OEM) supplied components that can impact this fault code. The pressure-side fuel filter is typically mounted directly to the engine, but can also be remote mounted. The suction-side fuel filters and other OEM supplied components are OEM specific. The OEM is required to supply a suction-side filter, and the exact filter location is OEM dependent. Refer to the OEM service manual.

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

Conditions for Setting the Fault Codes:
Fuel pressure was less than a calibratible value during high fuel flow conditions indicating a fuel inlet restriction.

Action Taken When the Fault Code is Active:
The ECM illuminates the amber CHECK ENGINE lamp 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) 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:
Low fuel pressure at rated speed/load indicates a fuel inlet restriction or a plugged pressureside fuel filter.

Possible Causes:
1) A plugged pressure or suction side fuel filter
2) Collapsed fuel inlet lines
3) An obstructed suction tube in the fuel tank
4) Plugged fuel tank vents.
5) Malfunctioning high-pressure fuel system

Note: The mounting location of the suction side fuel filter will vary by OEM, and can possibly not be in an obvious location.

PACCAR PX-9 CM2350 (2013-17) Fault Code:237 PID:SID 30 SPN:644 FMI:2 External Speed Command Input (Multiple Unit Synchronization) – Data Erratic, Intermittent, or Incorrect
PACCAR PX-9 CM2350 (2013-17) Fault Code:2367 PID:SID 80 SPN:1073 FMI:3 Engine Brake Actuator Driver Output 2 Circuit – Voltage Above Normal or Shorted to High Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:2363 PID:SID 80 SPN:1073 FMI:4 Engine Brake Actuator Driver Output 2 Circuit – Voltage Below Normal or Shorted to Low Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:2357 PID:SID 146 SPN:2791 FMI:7 EGR Valve Control Circuit – Mechanical System Not Responding or Out of Adjustment
PACCAR PX-9 CM2350 (2013-17) Fault Code:2353 PID:SID 146 SPN:2791 FMI:6 EGR Valve Control Circuit – Current Above Normal or Grounded Circuit
PACCAR PX-9 CM2350 (2013-17) Fault Code:235 PID:111 SPN:111 FMI:1 Coolant Level – Data Valid But Below Normal Operating Range – Most Severe Level

Leer más →

PACCAR PX-9 CM2350 (2013-17) Fault Code:2372 PID:95 SPN:95 FMI:16 Fuel Filter Differential Pressure – Data Valid But Above Normal Operating Range – Moderately Severe Level

Reason:
Fuel Filter Differential Pressure – Data Valid But Above Normal Operational Range – Moderately Severe Level. Excessive fuel flow restriction to the high pressure fuel pump has been detected.

Effect:
Possible reduced engine performance.

Circuit Description:
The engine control module (ECM) monitors engine operating conditions, including the reading of fuel rail pressure, and changes the flow command to either increase (OPEN the fuel pump actuator) or decrease (CLOSE the fuel pump actuator) the fuel supply to the high-pressure pump.

Component Location:
There are two fuel filters and several original equipment manufacturer (OEM) supplied components that can impact this fault code. The pressure-side fuel filter is typically mounted directly to the engine, but can also be remote mounted. The suction-side fuel filters and other OEM supplied components are OEM specific. The OEM is required to supply a suction-side filter, and the exact filter location is OEM dependent. Refer to the OEM service manual.

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

Conditions for Setting the Fault Codes:
Fuel pressure was less than a calibratible value during high fuel flow conditions indicating a fuel inlet restriction.

Action Taken When the Fault Code is Active:
The ECM illuminates the amber CHECK ENGINE lamp 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) 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:
Low fuel pressure at rated speed/load indicates a fuel inlet restriction or a plugged pressureside fuel filter.

Possible Causes:
1) A plugged pressure or suction side fuel filter
2) Collapsed fuel inlet lines
3) An obstructed suction tube in the fuel tank
4) Plugged fuel tank vents.
5) Malfunctioning high-pressure fuel system

Note: The mounting location of the suction side fuel filter will vary by OEM, and can possibly not be in an obvious location.

PACCAR PX-9 CM2350 (2013-17) Fault Code:2372 PID:95 SPN:95 FMI:0 Fuel Filter Differential Pressure – Data Valid But Above Normal Operating Range – Moderately Severe Level
PACCAR PX-9 CM2350 (2013-17) Fault Code:237 PID:SID 30 SPN:644 FMI:2 External Speed Command Input (Multiple Unit Synchronization) – Data Erratic, Intermittent, or Incorrect
PACCAR PX-9 CM2350 (2013-17) Fault Code:2367 PID:SID 80 SPN:1073 FMI:3 Engine Brake Actuator Driver Output 2 Circuit – Voltage Above Normal or Shorted to High Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:2363 PID:SID 80 SPN:1073 FMI:4 Engine Brake Actuator Driver Output 2 Circuit – Voltage Below Normal or Shorted to Low Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:2357 PID:SID 146 SPN:2791 FMI:7 EGR Valve Control Circuit – Mechanical System Not Responding or Out of Adjustment
PACCAR PX-9 CM2350 (2013-17) Fault Code:2353 PID:SID 146 SPN:2791 FMI:6 EGR Valve Control Circuit – Current Above Normal or Grounded Circuit

Leer más →

PACCAR PX-9 CM2350 (2013-17) Fault Code:2373 PID:131 SPN:1209 FMI:3 Exhaust Gas Pressure Sensor 1 Circuit – Voltage Above Normal or Shorted to High Source

Reason:
Exhaust Gas Pressure Sensor Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at the exhaust gas pressure circuit.

Effect:
Possible reduced engine performance

Circuit Description:
The exhaust gas pressure sensor is used to measure exhaust gas pressure in the exhaust manifold. This information is used by the engine control module (ECM) to control emissions and exhaust gas recirculation (EGR) valve operation. The ECM provides a 5 volt supply to the exhaust gas pressure sensor on the sensor supply circuit. The ECM also provides a ground on the sensor return circuit. The exhaust gas pressure sensor provides a signal to the ECM on the exhaust gas pressure sensor signal circuit. This sensor signal voltage changes, based on the pressure in the exhaust manifold.

Component Location:
The exhaust gas pressure sensor is located above the front section of the exhaust manifold and is plumbed into the exhaust 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 exhaust gas pressure signal voltage was greater than 4.75 VDC for more than 8 seconds.

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) A default value is used for the exhaust gas pressure sensor reading.
3) Diesel exhaust fluid injection into the aftertreatment system is disabled.
4) Active and stationary regeneration of the diesel particulate filter will be disabled.
5) Exhaust Gas Recirculation (EGR) valve operation will be disabled.
6) 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:
The exhaust gas pressure sensor shares supply and return wires in the engine harness with other sensors. Opens and shorts in the engine harness can cause multiple fault codes to be active.

Possible Causes:
1) An open return circuit in the engine harness, connectors, or sensor.
2) A signal wire shorted to sensor supply or battery voltage

PACCAR PX-9 CM2350 (2013-17) Fault Code:2372 PID:95 SPN:95 FMI:16 Fuel Filter Differential Pressure – Data Valid But Above Normal Operating Range – Moderately Severe Level
PACCAR PX-9 CM2350 (2013-17) Fault Code:2372 PID:95 SPN:95 FMI:0 Fuel Filter Differential Pressure – Data Valid But Above Normal Operating Range – Moderately Severe Level
PACCAR PX-9 CM2350 (2013-17) Fault Code:237 PID:SID 30 SPN:644 FMI:2 External Speed Command Input (Multiple Unit Synchronization) – Data Erratic, Intermittent, or Incorrect
PACCAR PX-9 CM2350 (2013-17) Fault Code:2367 PID:SID 80 SPN:1073 FMI:3 Engine Brake Actuator Driver Output 2 Circuit – Voltage Above Normal or Shorted to High Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:2363 PID:SID 80 SPN:1073 FMI:4 Engine Brake Actuator Driver Output 2 Circuit – Voltage Below Normal or Shorted to Low Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:2357 PID:SID 146 SPN:2791 FMI:7 EGR Valve Control Circuit – Mechanical System Not Responding or Out of Adjustment

Leer más →

PACCAR PX-9 CM2350 (2013-17) Fault Code:2374 PID:131 SPN:1209 FMI:4 Exhaust Gas Pressure Sensor 1 Circuit – Voltage Below Normal or Shorted to Low Source

Reason:
Exhaust Gas Pressure Sensor Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the exhaust gas pressure circuit.

Effect:
Possible reduced engine performance.

Circuit Description:
The exhaust gas pressure sensor is used to measure exhaust gas pressure in the exhaust manifold. This information is used by the engine control module (ECM) to control emissions and exhaust gas recirculation (EGR) valve operation. The ECM provides a 5 volt supply to the exhaust gas pressure sensor on the sensor supply circuit. The ECM also provides a ground on the sensor return circuit. The exhaust gas pressure sensor provides a signal to the ECM on the exhaust gas pressure sensor signal circuit. This sensor signal voltage changes, based on the pressure in the exhaust manifold.

Component Location:
The exhaust gas pressure sensor is located above the front section of the exhaust manifold and is plumbed into the exhaust 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 exhaust gas pressure signal voltage was less than 0.25-VDC for more than 8 seconds.

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) A default value is used for the exhaust gas pressure sensor reading.
3) Diesel exhaust fluid injection into the aftertreatment system is disabled.
4) Active and stationary regeneration of the diesel particulate filter will be disabled.
5) Exhaust Gas Recirculation (EGR) valve operation will be disabled.
6) 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:
The exhaust gas pressure sensor shares supply and return wires in the engine harness with other sensors. Opens and shorts in the engine harness can cause multiple fault codes to be active.

Possible Causes:
1) A signal circuit open or shorted to ground in the engine harness or sensor
2) A supply wire open or shorted to ground

PACCAR PX-9 CM2350 (2013-17) Fault Code:2373 PID:131 SPN:1209 FMI:3 Exhaust Gas Pressure Sensor 1 Circuit – Voltage Above Normal or Shorted to High Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:2372 PID:95 SPN:95 FMI:16 Fuel Filter Differential Pressure – Data Valid But Above Normal Operating Range – Moderately Severe Level
PACCAR PX-9 CM2350 (2013-17) Fault Code:2372 PID:95 SPN:95 FMI:0 Fuel Filter Differential Pressure – Data Valid But Above Normal Operating Range – Moderately Severe Level
PACCAR PX-9 CM2350 (2013-17) Fault Code:237 PID:SID 30 SPN:644 FMI:2 External Speed Command Input (Multiple Unit Synchronization) – Data Erratic, Intermittent, or Incorrect
PACCAR PX-9 CM2350 (2013-17) Fault Code:2367 PID:SID 80 SPN:1073 FMI:3 Engine Brake Actuator Driver Output 2 Circuit – Voltage Above Normal or Shorted to High Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:2363 PID:SID 80 SPN:1073 FMI:4 Engine Brake Actuator Driver Output 2 Circuit – Voltage Below Normal or Shorted to Low Source

Leer más →

PACCAR PX-9 CM2350 (2013-17) Fault Code:2375 PID:412 SPN:412 FMI:3 Exhaust Gas Recirculation Temperature Sensor Circuit – Voltage Above Normal or Shorted to High Source

Reason:
Exhaust Gas Recirculation Temperature Sensor Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at EGR temperature circuit.

Effect:
Possible reduced engine performance

Circuit Description:
The exhaust gas recirculation (EGR) temperature sensor is a variable resistor sensor and is used to measure the temperature of the EGR gas flow after it exits the EGR cooler. The engine control module (ECM) supplies 5 volts to the EGR temperature signal circuit. The ECM monitors the change in voltage caused by changes in the resistance of the sensor to determine the EGR flow temperature.

The EGR temperature value is used by the ECM for the engine protection system and engine emissions control.

Component Location:
The EGR temperature sensor is located on the EGR connection tube between the EGR cooler and the air intake connection.

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 EGR temperature signal voltage was greater than 4.9-VDC for more than 8 seconds.

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) A default value for the exhaust gas recirculation temperature reading is used.
3) Diesel exhaust fluid injection into the aftertreatment system is disabled.
4) Active and stationary regeneration of the diesel particulate filter will be disabled.
5) Exhaust Gas Recirculation (EGR) valve operation will be disabled.
6) 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:
The EGR temperature sensor shares return wires in the engine harness with other sensors. An open return can cause multiple fault codes to be active.

Possible Causes:
1) An open return circuit in the harness, connectors, or sensor
2) An open signal circuit or shorted to a voltage source

PACCAR PX-9 CM2350 (2013-17) Fault Code:2374 PID:131 SPN:1209 FMI:4 Exhaust Gas Pressure Sensor 1 Circuit – Voltage Below Normal or Shorted to Low Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:2373 PID:131 SPN:1209 FMI:3 Exhaust Gas Pressure Sensor 1 Circuit – Voltage Above Normal or Shorted to High Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:2372 PID:95 SPN:95 FMI:16 Fuel Filter Differential Pressure – Data Valid But Above Normal Operating Range – Moderately Severe Level
PACCAR PX-9 CM2350 (2013-17) Fault Code:2372 PID:95 SPN:95 FMI:0 Fuel Filter Differential Pressure – Data Valid But Above Normal Operating Range – Moderately Severe Level
PACCAR PX-9 CM2350 (2013-17) Fault Code:237 PID:SID 30 SPN:644 FMI:2 External Speed Command Input (Multiple Unit Synchronization) – Data Erratic, Intermittent, or Incorrect
PACCAR PX-9 CM2350 (2013-17) Fault Code:2367 PID:SID 80 SPN:1073 FMI:3 Engine Brake Actuator Driver Output 2 Circuit – Voltage Above Normal or Shorted to High Source

Leer más →

PACCAR PX-9 CM2350 (2013-17) Fault Code:2376 PID:412 SPN:412 FMI:4 Exhaust Gas Recirculation Temperature Sensor Circuit – Voltage Below Normal or Shorted to Low Source

Reason:
Exhaust Gas Recirculation Temperature Sensor Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at EGR temperature circuit

Effect:
Possible reduced engine performance.

Circuit Description:
The exhaust gas recirculation (EGR) temperature sensor is a variable resistor sensor and is used to measure the temperature of the EGR gas flow after it exits the EGR cooler. The engine control module (ECM) supplies 5 volts to the EGR temperature signal circuit. The ECM monitors the change in voltage caused by changes in the resistance of the sensor to determine the EGR flow temperature.

The EGR temperature value is used by the ECM for the engine protection system and engine emissions control.

Component Location:
The EGR temperature sensor is located on the EGR connection tube between the EGR cooler and the air intake connection.

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 EGR temperature signal voltage was less than 0.05-VDC for more than 8 seconds.

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) A default value for the exhaust gas recirculation temperature reading is used.
3) Diesel exhaust fluid injection into the aftertreatment system is disabled.
4) Active and stationary regeneration of the diesel particulate filter will be disabled.
5) Exhaust Gas Recirculation (EGR) valve operation will be disabled.
6) 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:
The EGR temperature sensor shares return wires in the engine harness with other sensors. An open return can cause multiple fault codes to be active.

Possible Causes:
1) A signal shorted to ground in the harness
2) A signal shorted to return or ground in the sensor

PACCAR PX-9 CM2350 (2013-17) Fault Code:2375 PID:412 SPN:412 FMI:3 Exhaust Gas Recirculation Temperature Sensor Circuit – Voltage Above Normal or Shorted to High Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:2374 PID:131 SPN:1209 FMI:4 Exhaust Gas Pressure Sensor 1 Circuit – Voltage Below Normal or Shorted to Low Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:2373 PID:131 SPN:1209 FMI:3 Exhaust Gas Pressure Sensor 1 Circuit – Voltage Above Normal or Shorted to High Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:2372 PID:95 SPN:95 FMI:16 Fuel Filter Differential Pressure – Data Valid But Above Normal Operating Range – Moderately Severe Level
PACCAR PX-9 CM2350 (2013-17) Fault Code:2372 PID:95 SPN:95 FMI:0 Fuel Filter Differential Pressure – Data Valid But Above Normal Operating Range – Moderately Severe Level
PACCAR PX-9 CM2350 (2013-17) Fault Code:237 PID:SID 30 SPN:644 FMI:2 External Speed Command Input (Multiple Unit Synchronization) – Data Erratic, Intermittent, or Incorrect

Leer más →

PACCAR PX-9 CM2350 (2013-17) Fault Code:2377 PID:SID 33 SPN:647 FMI:3 Fan Control Circuit – Voltage Above Normal or Shorted to High Source

Reason:
Fan Control Circuit – Voltage Above Normal or Shorted to High Source. Open circuit or high voltage detected at the fan control circuit.

Effect:
The fan can stay on continuously or not run at all.

Circuit Description:
The fan control circuit is a device used by the engine to control the fan operation. When the engine control module (ECM) energizes the fan control circuit, the engine fan is engaged. The fan control circuit utilizes a pulse width modulated (PWM) signal. A PWM signal is a pulsed voltage signal between 0-VDC and system voltage. The frequency of the pulsed voltage signal is dependent on the application requirement. There are two types of fans supported by the fan control circuit; variable speed and ON/OFF. INSITE™ electronic service tool can be used to determine which fan type is currently set up for use. The fan control circuit varies by original equipment manufacturer (OEM). Certain OEMs can use a solenoid return that is wired to the ECM or can use a return that goes to the engine block or chassis ground.

Component Location:
The control solenoid location varies by OEM. Refer to the appropriate OEM service manual to determine the location.

Conditions for Running the Diagnostics:
For ON/OFF and variable speed fan types, the diagnostic runs when the fan is turned off and will latch active when the fan PWM signal is 100 percent. For all other fan types, the diagnostic runs when the fan PWM signal is less than 100 percent and will latch active when the fan PWM signal is 100 percent.

Conditions for Setting the Fault Codes:
The Engine Control Module (ECM) detected the fan control circuit pulse width modulated (PWM) signal voltage was greater then 0-VDC when the PWM signal was commanded OFF.

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) Fan operation will be disabled.

Conditions for Clearing the Fault Code:
1) To validate the repair, perform a key cycle, and leave the key in the ON position 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:
If Fault Code 2377 is still active after completing all the steps in this fault code troubleshooting tree, consult the OEM service literature for procedures to check the fan clutch device for an open circuit or short circuit to ground.

Possible Causes:
1) An open circuit in the engine harness or fan control solenoid.
2) A short circuit to voltage source in the OEM harness.
3) A malfunctioning ECM.

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

PACCAR PX-9 CM2350 (2013-17) Fault Code:2376 PID:412 SPN:412 FMI:4 Exhaust Gas Recirculation Temperature Sensor Circuit – Voltage Below Normal or Shorted to Low Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:2375 PID:412 SPN:412 FMI:3 Exhaust Gas Recirculation Temperature Sensor Circuit – Voltage Above Normal or Shorted to High Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:2374 PID:131 SPN:1209 FMI:4 Exhaust Gas Pressure Sensor 1 Circuit – Voltage Below Normal or Shorted to Low Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:2373 PID:131 SPN:1209 FMI:3 Exhaust Gas Pressure Sensor 1 Circuit – Voltage Above Normal or Shorted to High Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:2372 PID:95 SPN:95 FMI:16 Fuel Filter Differential Pressure – Data Valid But Above Normal Operating Range – Moderately Severe Level
PACCAR PX-9 CM2350 (2013-17) Fault Code:2372 PID:95 SPN:95 FMI:0 Fuel Filter Differential Pressure – Data Valid But Above Normal Operating Range – Moderately Severe Level

Leer más →

PACCAR PX-9 CM2350 (2013-17) Fault Code:238 PID:SID 232 SPN:3511 FMI:4 Sensor Supply 3 Circuit – Voltage Below Normal or Shorted to Low Source

Reason:
Sensor Supply 3 Circuit – Voltage Below Normal or Shorted to Low Source. Low voltage detected on the +5 volt sensor supply circuit to the engine speed sensor.

Effect:
Engine may run rough, may stop running, may not start, or may be difficult to start.

Circuit Description:
The sensor supply 3 circuit provides a 5 volt supply to the primary engine speed/position sensor.

Component Location:
Sensor Supply 3 originates in the engine wiring harness. It provides 5 VDC to the engine crankshaft speed/position sensor.

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 sensor supply 3 signal 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) The backup engine speed sensor will be used by the ECM for the engine speed signal.

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:
The ECM monitors the voltage level on the engine speed sensor +5 volt supply circuit. If the voltage falls below a calibratible limit, this fault is recorded.

Possible Causes:
1) Short circuit to ground in the engine harness, sensor, or ECM
2) Inactive fault codes
3) Damaged engine position sensor and circuit connected to the sensor supply and return
4) Faulty circuit response
5) Faulty crankshaft position sensor
6) Faulty ECM

PACCAR PX-9 CM2350 (2013-17) Fault Code:2377 PID:SID 33 SPN:647 FMI:3 Fan Control Circuit – Voltage Above Normal or Shorted to High Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:2376 PID:412 SPN:412 FMI:4 Exhaust Gas Recirculation Temperature Sensor Circuit – Voltage Below Normal or Shorted to Low Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:2375 PID:412 SPN:412 FMI:3 Exhaust Gas Recirculation Temperature Sensor Circuit – Voltage Above Normal or Shorted to High Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:2374 PID:131 SPN:1209 FMI:4 Exhaust Gas Pressure Sensor 1 Circuit – Voltage Below Normal or Shorted to Low Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:2373 PID:131 SPN:1209 FMI:3 Exhaust Gas Pressure Sensor 1 Circuit – Voltage Above Normal or Shorted to High Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:2372 PID:95 SPN:95 FMI:16 Fuel Filter Differential Pressure – Data Valid But Above Normal Operating Range – Moderately Severe Level

Leer más →

← Anterior 1 … 12 13 14 15 16 … 150 Siguiente →