Paccar

PACCAR PX-9 CM2350 (2013-17) Fault Code:1678 PID: SPN:3362 FMI:31 Aftertreatment Diesel Exhaust Fluid Dosing Unit Input Lines – Condition Exists

Reason:
Aftertreatment Diesel Exhaust Fluid Dosing Unit Input Lines – Condition Exists. The aftertreatment diesel exhaust fluid dosing unit is unable to prime.

Effect:
Possible reduced engine performance

Circuit Description:
The diesel exhaust fluid dosing unit lines are responsible for transporting diesel exhaust fluid between the dosing unit, dosing valve, and diesel exhaust fluid tank.

Component Location:
There are three diesel exhaust fluid lines. One line is between the dosing unit and dosing valve, and the other two lines are between the dosing unit and the diesel exhaust fluid tank. These lines can be partially hidden from view by the SCR system and other vehicle components. Line routing will vary, based on the aftertreatment architecture and the OEM.

Conditions for Running the Diagnostics:
This diagnostic runs when the SCR system is trying to prime.

Conditions for Setting the Fault Codes:
The aftertreatment diesel exhaust fluid dosing unit was unable to successfully prime after multiple attempts.

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.

Vehicle speed will be limited to 8 km [5 mi] per hour after extended engine operation with the fault code active.

Conditions for Clearing the Fault Code:
1) To validate the repair, perform the “Aftertreatment Diesel Exhaust Fluid System Leak Test” found under “ECM Diagnostic Tests” in the INSITE™ electronic service tool
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) Low aftertreatment diesel exhaust fluid level in the diesel exhaust fluid tank
2) The line heaters are not successfully thawing the frozen diesel exhaust fluid
3) The diesel exhaust fluid pressure line between the dosing unit and dosing valve is kinked, broken, or disconnected
4) The diesel exhaust fluid suction line between the diesel exhaust fluid tank and the dosing unit is kinked, broken, or disconnected
5) Malfunctioning diesel exhaust fluid dosing unit
6) The diesel exhaust fluid suction and return lines between the dosing unit and diesel exhaust fluid tank are reversed
7) Debris from the diesel exhaust fluid tank. If debris is found in the diesel exhaust fluid tank, clean the diesel exhaust fluid tank thoroughly and fill with certified diesel exhaust fluid.

PACCAR PX-9 CM2350 (2013-17) Fault Code:1678 PID: SPN:3362 FMI:11 Aftertreatment Diesel Exhaust Fluid Dosing Unit Input Lines – Condition Exists
PACCAR PX-9 CM2350 (2013-17) Fault Code:1678 PID: SPN:3031 FMI:3 Aftertreatment 1 Diesel Exhaust Fluid Tank Temperature Sensor – Voltage Above Normal or Shorted to High Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:1677 PID: SPN:3031 FMI:4 Aftertreatment 1 Diesel Exhaust Fluid Tank Temperature Sensor – Voltage Below Normal or Shorted to Low Source
PACCAR PX-9 CM2350 (2013-17) Fault Code1673 PID: SPN:1761 FMI:1 Aftertreatment 1 Diesel Exhaust Fluid Tank Level – Data Valid But Below Normal Operating Range – Most Severe Level
PACCAR PX-9 CM2350 (2013-17) Fault Code:1669-3 PID:203D SPN:1761 FMI:3 Aftertreatment 1 Diesel Exhaust Fluid Tank Level Sensor Circuit – Voltage Above Normal or Shorted to High Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:1669-2 PID:203D SPN:1761 FMI:3 Aftertreatment 1 Diesel Exhaust Fluid Tank Level Sensor Circuit – Voltage Above Normal or Shorted to High Source

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PACCAR PX-9 CM2350 (2013-17) Fault Code:1683 PID: SPN:3363 FMI:3 Aftertreatment 1 Diesel Exhaust Fluid Tank Heater – Voltage Above Normal or Shorted to High Source

Reason:
Aftertreatment Diesel Exhaust Fluid Tank Heater – Voltage Above Normal or Shorted to High Source. High signal voltage detected at the aftertreatment diesel exhaust fluid tank heater circuit.

Effect:
Possible reduced engine performance

Circuit Description:
The aftertreatment diesel exhaust fluid tank heater keeps the diesel exhaust fluid from freezing in the diesel exhaust fluid tank. The tank heater consists of an electrically powered tank heater control valve which controls the flow of engine coolant to a heating coil inside the diesel exhaust fluid tank. The tank heater control valve opens to allow coolant to flow to the heating coil when heating is commanded, and closes when heating is no longer required.

Component Location:
The diesel exhaust fluid tank heater control valve is located near the diesel exhaust fluid tank. Specific location will vary depending on the vehicle OEM. The tank heating coil is internal to the diesel exhaust fluid tank.

Conditions for Running the Diagnostics:
This diagnostic runs continuously when diesel exhaust fluid tank heating is being commanded.

Conditions for Setting the Fault Codes:
The Engine Control Module (ECM) detected the aftertreatment diesel exhaust fluid tank heater circuit is shorted to battery or open circuit

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) Diesel exhaust fluid tank heating will be disabled.
3) Engine torque will be reduced if the engine is operated for an extended period of time with this fault active.
4) Vehicle speed will be limited to 8 km [5 mi] per hour after extended engine operation with the fault code active.

Conditions for Clearing the Fault Code:
1) To validate the repair, perform a key cycle, and then use INSITE™ electronic service tool to perform the Diesel Exhaust Fluid Doser System Heater Test found under ECM Diagnostic Tests.
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:
Reference the appropriate OEM wiring diagram when troubleshooting circuits that utilize wiring supplied by the OEM.

Possible Causes:
1) Diesel exhaust fluid tank heater signal wire and return wire shorted together
2) Malfunctioning diesel exhaust fluid tank heater control valve

PACCAR PX-9 CM2350 (2013-17) Fault Code:1678 PID: SPN:3362 FMI:31 Aftertreatment Diesel Exhaust Fluid Dosing Unit Input Lines – Condition Exists
PACCAR PX-9 CM2350 (2013-17) Fault Code:1678 PID: SPN:3362 FMI:11 Aftertreatment Diesel Exhaust Fluid Dosing Unit Input Lines – Condition Exists
PACCAR PX-9 CM2350 (2013-17) Fault Code:1678 PID: SPN:3031 FMI:3 Aftertreatment 1 Diesel Exhaust Fluid Tank Temperature Sensor – Voltage Above Normal or Shorted to High Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:1677 PID: SPN:3031 FMI:4 Aftertreatment 1 Diesel Exhaust Fluid Tank Temperature Sensor – Voltage Below Normal or Shorted to Low Source
PACCAR PX-9 CM2350 (2013-17) Fault Code1673 PID: SPN:1761 FMI:1 Aftertreatment 1 Diesel Exhaust Fluid Tank Level – Data Valid But Below Normal Operating Range – Most Severe Level
PACCAR PX-9 CM2350 (2013-17) Fault Code:1669-3 PID:203D SPN:1761 FMI:3 Aftertreatment 1 Diesel Exhaust Fluid Tank Level Sensor Circuit – Voltage Above Normal or Shorted to High Source

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PACCAR PX-9 CM2350 (2013-17) Fault Code:1684 PID: SPN:3363 FMI:4 Aftertreatment 1 Diesel Exhaust Fluid Tank Heater – Voltage Below Normal or Shorted to Low Source

Reason:
Aftertreatment Diesel Exhaust Fluid Tank Heater – Voltage Below Normal, or Shorted to Low Source. Low signal voltage detected at the aftertreatment diesel exhaust fluid tank heater circuit.

Effect:
Possible reduced engine performance.

Circuit Description:
The aftertreatment diesel exhaust fluid tank heater keeps the diesel exhaust fluid from freezing in the diesel exhaust fluid tank. The tank heater consists of an electrically powered tank heater control valve which controls the flow of engine coolant to a heating coil inside the diesel exhaust fluid tank. The tank heater control valve opens to allow coolant to flow to the heating coil when heating is commanded, and closes when heating is no longer required.

Component Location:
The diesel exhaust fluid tank heater control valve is located near the diesel exhaust fluid tank. Specific location will vary depending on the vehicle OEM. The tank heating coil is internal to the diesel exhaust fluid tank.

Conditions for Running the Diagnostics:
This diagnostic runs continuously when diesel exhaust fluid tank heating is being commanded.

Conditions for Setting the Fault Codes:
The Engine Control Module (ECM) detected low signal voltage or a short to ground at the diesel exhaust fluid tank heater circuit

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) Diesel exhaust fluid tank heating will be disabled.
3) 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, and then use INSITE™ electronic service tool to perform the Diesel Exhaust Fluid Doser System Heater Test found under ECM Diagnostic Tests.
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) Malfunctioning diesel exhaust fluid tank heater control valve
2) A short circuit to ground

PACCAR PX-9 CM2350 (2013-17) Fault Code:1683 PID: SPN:3363 FMI:3 Aftertreatment 1 Diesel Exhaust Fluid Tank Heater – Voltage Above Normal or Shorted to High Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:1678 PID: SPN:3362 FMI:31 Aftertreatment Diesel Exhaust Fluid Dosing Unit Input Lines – Condition Exists
PACCAR PX-9 CM2350 (2013-17) Fault Code:1678 PID: SPN:3362 FMI:11 Aftertreatment Diesel Exhaust Fluid Dosing Unit Input Lines – Condition Exists
PACCAR PX-9 CM2350 (2013-17) Fault Code:1678 PID: SPN:3031 FMI:3 Aftertreatment 1 Diesel Exhaust Fluid Tank Temperature Sensor – Voltage Above Normal or Shorted to High Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:1677 PID: SPN:3031 FMI:4 Aftertreatment 1 Diesel Exhaust Fluid Tank Temperature Sensor – Voltage Below Normal or Shorted to Low Source
PACCAR PX-9 CM2350 (2013-17) Fault Code1673 PID: SPN:1761 FMI:1 Aftertreatment 1 Diesel Exhaust Fluid Tank Level – Data Valid But Below Normal Operating Range – Most Severe Level

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PACCAR PX-9 CM2350 (2013-17) Fault Code:1691 PID:1691 SPN:5298 FMI:18 Aftertreatment Diesel Oxidation Catalyst Conversion Efficiency – Data Valid But Below Normal Operating Range – Moderately Severe Level

Reason:
Aftertreatment Diesel Oxidation Catalyst Conversion Efficiency – Data Valid But Below Normal Operating Range – Moderately Severe Level. The temperature increase across the aftertreatment catalyst is lower than expected.

Effect:
Possible frequent need for aftertreatment regeneration

Circuit Description:
The aftertreatment diesel particulate filter temperature sensor module is a smart device that communicates with the engine control module via the J1939 data link. The aftertreatment diesel partculate filter temperature sensor module performs its own internal diagnostics and reports malfunctions back to the engine control module using the J1939 data link. The aftertreatment diesel particulate filter temperature sensor module is used to measure the aftertreatment diesel oxidation catalyst intake temperature, aftertreatment diesel particulate filter intake temperature, and aftertreatment diesel particulate filter outlet temperature. The temperature probes are permanently attached to the aftertreatment diesel particulate filter temperature sensor module and can not be replaced individually.

Component Location:
The aftertreatment diesel oxidation catalyst is located in the exhaust system. The location of the catalyst can vary, depending on the original equipment manufacturer (OEM). Refer to the OEM service manual.

Conditions for Running the Diagnostics:
This diagnostic runs continuously when the engine is running and active regeneration of the aftertreatment diesel particulate filter is occurring.

Conditions for Setting the Fault Codes:
The Engine Control Module (ECM) calculated the DOC efficiency was less than required to successfully complete a regeneration.

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 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) 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:
N/A

Possible Causes:
1) A malfunctioning diesel oxidation catalyst
2) A malfunctioning aftertreatment fuel injector

PACCAR PX-9 CM2350 (2013-17) Fault Code:1691 PID:SID 380 SPN:5298 FMI:1 Aftertreatment Diesel Oxidation Catalyst Conversion Efficiency – Data Valid But Below Normal Operating Range – Moderately Severe Level
PACCAR PX-9 CM2350 (2013-17) Fault Code:1684 PID: SPN:3363 FMI:4 Aftertreatment 1 Diesel Exhaust Fluid Tank Heater – Voltage Below Normal or Shorted to Low Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:1683 PID: SPN:3363 FMI:3 Aftertreatment 1 Diesel Exhaust Fluid Tank Heater – Voltage Above Normal or Shorted to High Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:1678 PID: SPN:3362 FMI:31 Aftertreatment Diesel Exhaust Fluid Dosing Unit Input Lines – Condition Exists
PACCAR PX-9 CM2350 (2013-17) Fault Code:1678 PID: SPN:3362 FMI:11 Aftertreatment Diesel Exhaust Fluid Dosing Unit Input Lines – Condition Exists
PACCAR PX-9 CM2350 (2013-17) Fault Code:1678 PID: SPN:3031 FMI:3 Aftertreatment 1 Diesel Exhaust Fluid Tank Temperature Sensor – Voltage Above Normal or Shorted to High Source

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PACCAR PX-9 CM2350 (2013-17) Fault Code:1691 PID:SID 380 SPN:5298 FMI:1 Aftertreatment Diesel Oxidation Catalyst Conversion Efficiency – Data Valid But Below Normal Operating Range – Moderately Severe Level

Reason:
Aftertreatment Diesel Oxidation Catalyst Conversion Efficiency – Data Valid But Below Normal Operating Range – Moderately Severe Level. The temperature increase across the aftertreatment catalyst is lower than expected.

Effect:
Possible frequent need for aftertreatment regeneration

Circuit Description:
The aftertreatment diesel particulate filter temperature sensor module is a smart device that communicates with the engine control module via the J1939 data link. The aftertreatment diesel partculate filter temperature sensor module performs its own internal diagnostics and reports malfunctions back to the engine control module using the J1939 data link. The aftertreatment diesel particulate filter temperature sensor module is used to measure the aftertreatment diesel oxidation catalyst intake temperature, aftertreatment diesel particulate filter intake temperature, and aftertreatment diesel particulate filter outlet temperature. The temperature probes are permanently attached to the aftertreatment diesel particulate filter temperature sensor module and can not be replaced individually.

Component Location:
The aftertreatment diesel oxidation catalyst is located in the exhaust system. The location of the catalyst can vary, depending on the original equipment manufacturer (OEM). Refer to the OEM service manual.

Conditions for Running the Diagnostics:
This diagnostic runs continuously when the engine is running and active regeneration of the aftertreatment diesel particulate filter is occurring.

Conditions for Setting the Fault Codes:
The Engine Control Module (ECM) calculated the DOC efficiency was less than required to successfully complete a regeneration.

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 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) 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:
N/A

Possible Causes:
1) A malfunctioning diesel oxidation catalyst
2) A malfunctioning aftertreatment fuel injector

PACCAR PX-9 CM2350 (2013-17) Fault Code:1684 PID: SPN:3363 FMI:4 Aftertreatment 1 Diesel Exhaust Fluid Tank Heater – Voltage Below Normal or Shorted to Low Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:1683 PID: SPN:3363 FMI:3 Aftertreatment 1 Diesel Exhaust Fluid Tank Heater – Voltage Above Normal or Shorted to High Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:1678 PID: SPN:3362 FMI:31 Aftertreatment Diesel Exhaust Fluid Dosing Unit Input Lines – Condition Exists
PACCAR PX-9 CM2350 (2013-17) Fault Code:1678 PID: SPN:3362 FMI:11 Aftertreatment Diesel Exhaust Fluid Dosing Unit Input Lines – Condition Exists
PACCAR PX-9 CM2350 (2013-17) Fault Code:1678 PID: SPN:3031 FMI:3 Aftertreatment 1 Diesel Exhaust Fluid Tank Temperature Sensor – Voltage Above Normal or Shorted to High Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:1677 PID: SPN:3031 FMI:4 Aftertreatment 1 Diesel Exhaust Fluid Tank Temperature Sensor – Voltage Below Normal or Shorted to Low Source

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PACCAR PX-9 CM2350 (2013-17) Fault Code:1695 PID:SID 232 SPN:3513 FMI:3 Sensor Supply 5 – Voltage Above Normal or Shorted to High Source

Reason:
Sensor Supply 5 – Voltage Above Normal or Shorted to High Source. High voltage detected at sensor supply number 5 circuit in the OEM harness

Effect:
The engine will operate in Limp Home mode.

Circuit Description:
The sensor supply 5 circuit of the engine control module (ECM) provides a 5 volt supply for various aftertreatment and OEM sensors.

Component Location:
Sensor Supply 5 originates in the OEM wiring harness connector portion of the ECM.

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 5 signal 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) The engine will have limp-home throttle control only.

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:
High voltage on the 5-VDC supply wire can be caused by a short circuit to a power supply, a damaged sensor, or a damaged ECM power supply.

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
3) Faulty OEM harness

PACCAR PX-9 CM2350 (2013-17) Fault Code:1691 PID:1691 SPN:5298 FMI:18 Aftertreatment Diesel Oxidation Catalyst Conversion Efficiency – Data Valid But Below Normal Operating Range – Moderately Severe Level
PACCAR PX-9 CM2350 (2013-17) Fault Code:1691 PID:SID 380 SPN:5298 FMI:1 Aftertreatment Diesel Oxidation Catalyst Conversion Efficiency – Data Valid But Below Normal Operating Range – Moderately Severe Level
PACCAR PX-9 CM2350 (2013-17) Fault Code:1684 PID: SPN:3363 FMI:4 Aftertreatment 1 Diesel Exhaust Fluid Tank Heater – Voltage Below Normal or Shorted to Low Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:1683 PID: SPN:3363 FMI:3 Aftertreatment 1 Diesel Exhaust Fluid Tank Heater – Voltage Above Normal or Shorted to High Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:1678 PID: SPN:3362 FMI:31 Aftertreatment Diesel Exhaust Fluid Dosing Unit Input Lines – Condition Exists
PACCAR PX-9 CM2350 (2013-17) Fault Code:1678 PID: SPN:3362 FMI:11 Aftertreatment Diesel Exhaust Fluid Dosing Unit Input Lines – Condition Exists

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PACCAR PX-9 CM2350 (2013-17) Fault Code:1696 PID:SID 232 SPN:3513 FMI:4 Sensor Supply 5 – Voltage Below Normal or Shorted to Low Source

Reason:
Sensor Supply 5 – Voltage Below Normal or Shorted to Low Source. Low voltage detected at sensor supply number 5 circuit in the OEM harness.

Effect:
The engine will operate in Limp Home mode.

Circuit Description:
The sensor supply 5 circuit of the engine control module (ECM) provides a 5 volt supply for various aftertreatment and OEM sensors.

Component Location:
Sensor Supply 5 originates in the OEM wiring harness connector portion of the ECM.

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 5 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 engine will have limp-home throttle control only.

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:
Low voltage on the 5 volt supply wire can be caused by a short circuit to ground in a supply wire, a short circuit between a supply wire and a return wire, a damaged sensor, or a damaged ECM power supply.

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 sensors or circuits
3) Faulty circuit response

PACCAR PX-9 CM2350 (2013-17) Fault Code:1695 PID:SID 232 SPN:3513 FMI:3 Sensor Supply 5 – Voltage Above Normal or Shorted to High Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:1691 PID:1691 SPN:5298 FMI:18 Aftertreatment Diesel Oxidation Catalyst Conversion Efficiency – Data Valid But Below Normal Operating Range – Moderately Severe Level
PACCAR PX-9 CM2350 (2013-17) Fault Code:1691 PID:SID 380 SPN:5298 FMI:1 Aftertreatment Diesel Oxidation Catalyst Conversion Efficiency – Data Valid But Below Normal Operating Range – Moderately Severe Level
PACCAR PX-9 CM2350 (2013-17) Fault Code:1684 PID: SPN:3363 FMI:4 Aftertreatment 1 Diesel Exhaust Fluid Tank Heater – Voltage Below Normal or Shorted to Low Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:1683 PID: SPN:3363 FMI:3 Aftertreatment 1 Diesel Exhaust Fluid Tank Heater – Voltage Above Normal or Shorted to High Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:1678 PID: SPN:3362 FMI:31 Aftertreatment Diesel Exhaust Fluid Dosing Unit Input Lines – Condition Exists

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PACCAR PX-9 CM2350 (2013-17) Fault Code:1712 PID: SPN:3363 FMI:1 Aftertreatment Diesel Exhaust Fluid Tank Heater – Data Valid But Below Normal Operating Range – Moderately Severe Level

Reason:
Aftertreatment Diesel Exhaust Fluid Tank Heater – Data Valid But Below Normal Operating Range -Moderately Severe Level. The aftertreatment diesel exhaust fluid tank heater is unable to thaw the frozen diesel exhaust fluid.

Effect:
Possible reduced engine performance

Circuit Description:
The aftertreatment diesel exhaust fluid tank heater keeps the diesel exhaust fluid from freezing in the diesel exhaust fluid tank. The tank heater consists of an electrically powered tank heater control valve which controls the flow of engine coolant to a heating coil inside the diesel exhaust fluid tank. The tank heater control valve opens to allow coolant to flow to the heating coil when heating is commanded, and closes when heating is no longer required.

Component Location:
The diesel exhaust fluid tank heater control valve is located near the diesel exhaust fluid tank. Specific location will vary depending on the vehicle OEM. The tank heating coil is internal to the diesel exhaust fluid tank.

Conditions for Running the Diagnostics:
This diagnostic runs a calibrated amount of time after diesel exhaust fluid tank heating is first commanded.

Conditions for Setting the Fault Codes:
The Engine Control Module (ECM) detected the aftertreatment diesel exhaust fluid tank temperature failed to thaw after the aftertreatment diesel exhaust fluid tank heater was commanded on for a calibratable time.

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) The fault code status in INSITE™ electronic service tool will change to INACTIVE immediately after the system is able to adequately heat and the diagnostic runs and passes. If heating can not be completed, use the “Diesel Exhaust Fluid Doser System Heater Test” found under “ECM Diagnostic Test” in INSITE™ electronic service tool to command heating to the tank heater and all line heaters.
2) The ECM will turn off the amber CHECK ENGINE lamp 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:
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) Aftertreatment diesel exhaust fluid tank heater control valve stuck closed
2) Blockage or restrictons in the coolant plumbing to the diesel exhaust fluid tank heater
3) Engine coolant level low
4) Malfunctioning aftertreatment diesel exhaust fluid tank heater control valve

PACCAR PX-9 CM2350 (2013-17) Fault Code:1712 PID: SPN:3363 FMI:18 Aftertreatment Diesel Exhaust Fluid Tank Heater – Data Valid But Below Normal Operating Range – Moderately Severe Level
PACCAR PX-9 CM2350 (2013-17) Fault Code:1696 PID:SID 232 SPN:3513 FMI:4 Sensor Supply 5 – Voltage Below Normal or Shorted to Low Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:1695 PID:SID 232 SPN:3513 FMI:3 Sensor Supply 5 – Voltage Above Normal or Shorted to High Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:1691 PID:1691 SPN:5298 FMI:18 Aftertreatment Diesel Oxidation Catalyst Conversion Efficiency – Data Valid But Below Normal Operating Range – Moderately Severe Level
PACCAR PX-9 CM2350 (2013-17) Fault Code:1691 PID:SID 380 SPN:5298 FMI:1 Aftertreatment Diesel Oxidation Catalyst Conversion Efficiency – Data Valid But Below Normal Operating Range – Moderately Severe Level
PACCAR PX-9 CM2350 (2013-17) Fault Code:1684 PID: SPN:3363 FMI:4 Aftertreatment 1 Diesel Exhaust Fluid Tank Heater – Voltage Below Normal or Shorted to Low Source

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PACCAR PX-9 CM2350 (2013-17) Fault Code:1712 PID: SPN:3363 FMI:18 Aftertreatment Diesel Exhaust Fluid Tank Heater – Data Valid But Below Normal Operating Range – Moderately Severe Level

Reason:
Aftertreatment Diesel Exhaust Fluid Tank Heater – Data Valid But Below Normal Operating Range -Moderately Severe Level. The aftertreatment diesel exhaust fluid tank heater is unable to thaw the frozen diesel exhaust fluid.

Effect:
Possible reduced engine performance

Circuit Description:
The aftertreatment diesel exhaust fluid tank heater keeps the diesel exhaust fluid from freezing in the diesel exhaust fluid tank. The tank heater consists of an electrically powered tank heater control valve which controls the flow of engine coolant to a heating coil inside the diesel exhaust fluid tank. The tank heater control valve opens to allow coolant to flow to the heating coil when heating is commanded, and closes when heating is no longer required.

Component Location:
The diesel exhaust fluid tank heater control valve is located near the diesel exhaust fluid tank. Specific location will vary depending on the vehicle OEM. The tank heating coil is internal to the diesel exhaust fluid tank.

Conditions for Running the Diagnostics:
This diagnostic runs a calibrated amount of time after diesel exhaust fluid tank heating is first commanded.

Conditions for Setting the Fault Codes:
The Engine Control Module (ECM) detected the aftertreatment diesel exhaust fluid tank temperature failed to thaw after the aftertreatment diesel exhaust fluid tank heater was commanded on for a calibratable time.

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) The fault code status in INSITE™ electronic service tool will change to INACTIVE immediately after the system is able to adequately heat and the diagnostic runs and passes. If heating can not be completed, use the “Diesel Exhaust Fluid Doser System Heater Test” found under “ECM Diagnostic Test” in INSITE™ electronic service tool to command heating to the tank heater and all line heaters.
2) The ECM will turn off the amber CHECK ENGINE lamp 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:
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) Aftertreatment diesel exhaust fluid tank heater control valve stuck closed
2) Blockage or restrictons in the coolant plumbing to the diesel exhaust fluid tank heater
3) Engine coolant level low
4) Malfunctioning aftertreatment diesel exhaust fluid tank heater control valve

PACCAR PX-9 CM2350 (2013-17) Fault Code:1696 PID:SID 232 SPN:3513 FMI:4 Sensor Supply 5 – Voltage Below Normal or Shorted to Low Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:1695 PID:SID 232 SPN:3513 FMI:3 Sensor Supply 5 – Voltage Above Normal or Shorted to High Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:1691 PID:1691 SPN:5298 FMI:18 Aftertreatment Diesel Oxidation Catalyst Conversion Efficiency – Data Valid But Below Normal Operating Range – Moderately Severe Level
PACCAR PX-9 CM2350 (2013-17) Fault Code:1691 PID:SID 380 SPN:5298 FMI:1 Aftertreatment Diesel Oxidation Catalyst Conversion Efficiency – Data Valid But Below Normal Operating Range – Moderately Severe Level
PACCAR PX-9 CM2350 (2013-17) Fault Code:1684 PID: SPN:3363 FMI:4 Aftertreatment 1 Diesel Exhaust Fluid Tank Heater – Voltage Below Normal or Shorted to Low Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:1683 PID: SPN:3363 FMI:3 Aftertreatment 1 Diesel Exhaust Fluid Tank Heater – Voltage Above Normal or Shorted to High Source

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PACCAR PX-9 CM2350 (2013-17) Fault Code:1713 PID: SPN:3363 FMI:0 Aftertreatment Diesel Exhaust Fluid Tank Heater – Data Valid But Above Normal Operating Range – Moderately Severe Level

Reason:
Aftertreatment Diesel Exhaust Fluid Tank Heater – Data Valid But Above Normal Operating Range – Moderately Severe Level. The diesel exhaust fluid tank heater is continuously in the ON position.

Effect:
None on performance

Circuit Description:
The aftertreatment diesel exhaust fluid tank heater keeps the diesel exhaust fluid from freezing in the diesel exhaust fluid tank. The tank heater consists of an electrically powered tank heater control valve which controls the flow of engine coolant to a heating coil inside the diesel exhaust fluid tank. The tank heater control valve opens to allow coolant to flow to the heating coil when heating is commanded, and closes when heating is no longer required.

Component Location:
The diesel exhaust fluid tank heater control valve is located near the diesel exhaust fluid tank. Specific location will vary depending on the vehicle OEM. The tank heating coil is internal to the diesel exhaust fluid tank.

Conditions for Running the Diagnostics:
This diagnostic runs continuously when diesel exhaust fluid tank heating is NOT being commanded.

Conditions for Setting the Fault Codes:
The Engine Control Module (ECM) detected the DEF tank temperature was greater than 75°C [170°F] indicating the aftertreatment diesel exhaust fluid tank heater was in the ON position when the ECM was commanding the heater to be in the OFF position.

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) Diesel exhaust fluid injection into the aftertreatment system is disabled.
3) 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:
Before troubleshooting this fault code, make sure the vehicle is not equipped with an auxiliary heating device for the diesel exhaust fluid tank. Such a device can result in overheating the diesel exhaust fluid in the tank.

This fault code may be inactive when the vehicle is brought in for service. Even if inactive, follow the troubleshooting tree completely.

Reason: If there is a problem with the diesel exhaust fluid (DEF) tank heater control valve, the valve is stuck open, there is coolant leaking past the valve seat, or the valve is incorrectly installed, it can take long periods of operation at high load before the tank temperature gradually increases to the fault code threshold value of 77°C [170°F]. As soon as the temperature drops below 75°C [167°F] due to a stopped engine, overnight parking, reduced coolant temperature, and so forth, the fault code will go inactive while the root cause of the issue is still present.

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) Aftertreatment diesel exhaust fluid tank heater control valve installed incorrectly, reversed relative to coolant flow direction.
2) Malfunctioning aftertreatment diesel exhaust fluid tank heater control valve – stuck open or leakage past the valve seat.

PACCAR PX-9 CM2350 (2013-17) Fault Code:1713 PID: SPN:3363 FMI:16 Aftertreatment Diesel Exhaust Fluid Tank Heater – Data Valid But Above Normal Operating Range – Moderately Severe Level
PACCAR PX-9 CM2350 (2013-17) Fault Code:1712 PID: SPN:3363 FMI:1 Aftertreatment Diesel Exhaust Fluid Tank Heater – Data Valid But Below Normal Operating Range – Moderately Severe Level
PACCAR PX-9 CM2350 (2013-17) Fault Code:1712 PID: SPN:3363 FMI:18 Aftertreatment Diesel Exhaust Fluid Tank Heater – Data Valid But Below Normal Operating Range – Moderately Severe Level
PACCAR PX-9 CM2350 (2013-17) Fault Code:1696 PID:SID 232 SPN:3513 FMI:4 Sensor Supply 5 – Voltage Below Normal or Shorted to Low Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:1695 PID:SID 232 SPN:3513 FMI:3 Sensor Supply 5 – Voltage Above Normal or Shorted to High Source
PACCAR PX-9 CM2350 (2013-17) Fault Code:1691 PID:1691 SPN:5298 FMI:18 Aftertreatment Diesel Oxidation Catalyst Conversion Efficiency – Data Valid But Below Normal Operating Range – Moderately Severe Level

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