P10D0
DTC P10D0
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptor
DTC P10D0
- Reductant Injector Temperature - Exhaust Gas Temperature 2 Correlation
Typical Scan Tool Data
Circuit/System Description
The exhaust gas temperature sensors are variable resistors that measure the temperature of the exhaust gas at the inlet and outlet of the diesel oxidation catalyst as well as the inlet and outlet of the Diesel Particulate Filter (DPF). The Engine Control Module (ECM) supplies a bias 5-volt signal to the exhaust gas temperature sensor signal circuit, and supplies a ground to the low reference circuit. The exhaust gas temperature information is used by the ECM during the particulate filter cleaning process.
The selective catalytic reduction (SCR) system reduces oxides of nitrogen (NOx) emissions by injecting a metered amount of diesel exhaust fluid (DEF) or reductant into the exhaust gas stream entering the SCR catalyst. Within the SCR catalyst, the DEF reacts with the NOx to form nitrogen, carbon dioxide, and water vapor. Upstream and downstream NOx sensors provide the engine control module (ECM) with engine-out and tailpipe-out NOx levels. The ECM varies the amount of DEF added by varying the reductant injector duty-cycle in response to changes in engine-out NOx levels. The ECM supplies voltage to the reductant injector on the injector high control circuit. The ECM turns ON the reductant injector by grounding the low control circuit of the injector. The DEF injector temperature is modeled based on internal injector resistance of the injector coil and is used to monitor the temperature of the injector to prevent damage.
Conditions for Running the DTC
* The ignition has been OFF for greater than 8 hours.
* Reductant dosing has not been requested by the ECM.
* The engine is running for less than 10 s.
* The ambient air temperature is greater than -60°C (-76°F)
* Battery voltage is greater than 11 V.
* DTC P10D0 runs once per key cycle when the above conditions are met.
Conditions for Setting the DTC
An implausible injector coil temperature is detected by comparing the coil temperature with the EGT sensor 2 as a reference temperature. This is done after a sufficient engine off time and before the coil has been energized. If the absolute difference between the coil and reference temperature is greater than a calibrated threshold, then P10D0 is set.
Action Taken When the DTC Sets
DTC P10D0 is a Type B DTC
Conditions for Clearing the DTC
DTC P10D0 is a Type B DTC
Diagnostic Aids
A slight to moderate resistance in either the signal or low reference circuits, can widen the spread between the exhaust gas temperature sensors and the reductant injector, and cause the DTC to set.
Reference Information
Schematic Reference
Engine Controls Schematics [1][2]Electrical Diagrams
Connector End View Reference
Component Connector End Views 1-2 Shift Solenoid (SS) Valve (M30)
Description and Operation
Exhaust Aftertreatment System Description Exhaust Aftertreatment System Description
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References Control Module References for scan tool information
Special Tools
J 25070 - Heat Gun 500-750°F
Circuit/System Verification
Note: Determine the ambient temperature by using an accurate thermometer.
1. Ignition OFF for greater than 8 hours.
2. Ignition ON.
3. Verify DTCs P113A, P2080, P2084, P20E2, P242B or P246F are not set.
• If any of the DTCs are set
Refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle
• If none of the DTCs are set
4. Verify the scan tool EGT Sensor 2 parameter is within 30°C (54°F) of the ambient temperature.
• If not within 30°C (54°F)
Replace the B131 EGT sensor 2.
• If within 30°C (54°F)
5. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the Q61 Emission Reduction Fluid Injector. It may take up to 2 minutes for all vehicle systems to power down.
6. Verify the Q61 Emission Reduction Fluid Injector resistance is within the range specified in the Temperature Versus Resistance (Fuel Temperature Sensor) Temperature Versus Resistance (Fuel Temperature Sensor)Temperature Versus Resistance (ECT Sensors) Temperature Versus Resistance (ECT Sensors)Temperature Versus Resistance (IAT Sensor 1) Temperature Versus Resistance (IAT Sensor 1)Temperature Versus Resistance (IAT Sensor 2) Temperature Versus Resistance (IAT Sensor 2)Temperature Versus Resistance (EGT Sensors) Temperature Versus Resistance (EGT Sensors)Temperature Versus Resistance (EGR Temperature Sensors) Temperature Versus Resistance (EGR Temperature Sensors)Temperature Versus Resistance (Emission Reduction Fluid Injector) [1][2]Diesel Emissions Fluid (DEF) System table. Measure and record the resistance of the Q61 Emission Reduction Fluid Injector between the low reference circuit terminal 1 and the control circuit terminal 2 and compare to the measurements to the Temperature Versus Resistance (Fuel Temperature Sensor) Temperature Versus Resistance (Fuel Temperature Sensor)Temperature Versus Resistance (ECT Sensors) Temperature Versus Resistance (ECT Sensors)Temperature Versus Resistance (IAT Sensor 1) Temperature Versus Resistance (IAT Sensor 1)Temperature Versus Resistance (IAT Sensor 2) Temperature Versus Resistance (IAT Sensor 2)Temperature Versus Resistance (EGT Sensors) Temperature Versus Resistance (EGT Sensors)Temperature Versus Resistance (EGR Temperature Sensors) Temperature Versus Resistance (EGR Temperature Sensors)Temperature Versus Resistance (Emission Reduction Fluid Injector) [1][2]Diesel Emissions Fluid (DEF) System chart.
• If not within the specified range
Replace the Q61 Emission Reduction Fluid Injector.
• If within the specified range
7. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
8. Verify a DTC does not set.
• If any DTCs set
Refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle
• If no DTCs set
9. All OK.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Exhaust Temperature Sensor Replacement - Position 2 Exhaust Temperature Sensor Replacement - Position 2
* Emission Reduction Fluid Injector Replacement Service and Repair
* Control Module References Control Module References for ECM replacement, programming, and setup