DTC P02CC-P02CF or P02D0-P02D7

Engine Controls and Fuel - 3.0L LM2 Diesel | Diagnostic Information and Procedures | Document ID: 5398962 Diagnostic Instructions Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions DTC Descriptor DTC P02CC Cylinder 1 Fuel Injector Exceeded Minimum Learning Limit DTC P02CD Cylinder 1 Fuel Injector Exceeded Maximum Learning Limit DTC P02CE Cylinder 2 Fuel Injector Exceeded Minimum Learning Limit DTC P02CF Cylinder 2 Fuel Injector Exceeded Maximum Learning Limit DTC P02D0 Cylinder 3 Fuel Injector Exceeded Minimum Learning Limit DTC P02D1 Cylinder 3 Fuel Injector Exceeded Maximum Learning Limit DTC P02D2 Cylinder 4 Fuel Injector Exceeded Minimum Learning Limit DTC P02D3 Cylinder 4 Fuel Injector Exceeded Maximum Learning Limit DTC P02D4 Cylinder 5 Fuel Injector Exceeded Minimum Learning Limit DTC P02D5 Cylinder 5 Fuel Injector Exceeded Maximum Learning Limit DTC P02D6 Cylinder 6 Fuel Injector Exceeded Minimum Learning Limit DTC P02D7 Cylinder 6 Fuel Injector Exceeded Maximum Learning Limit Circuit/System Description For an overview of the component/system, refer to: Fuel System Description

Circuit	Description
Control — Terminal 1	The output circuit is switched to 50 V to activate the component.
Control — Terminal 2	The output circuit is switched to ground to activate the component.

	Component	Description
	K20 Engine Control Module	The control module controls a series of actuators to ensure optimal engine performance. The control module does this by reading values from a variety of
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Component	Description
	sensors, interprets the data and adjusts the engine actuators accordingly.
Q17 Fuel Injector	Fuel injectors are solenoid valves that inject fuel either into the intake system or directly into the cylinder. The amount of fuel injected depends on the length of the electrical pulse that is applied.

The engine control module calculates the injected fuel quantity in two different ways: Fuel quantity based on the time the injector was turned on. Fuel quantity based on the increase in crankshaft speed when a specific cylinder fires. Conditions for Running the DTC DTCs related to the following system/component = Not Set – B26 Crankshaft Position Sensor – B34 Engine Coolant Temperature Sensor – R29 Fuel Filter – Q14A Exhaust Gas Recirculation Valve 1 – Q14B Exhaust Gas Recirculation Valve 2 – Q18A Fuel Pressure Regulator 1 – Q18B Fuel Pressure Regulator 2 – Q18C Fuel Pressure Regulator 3 – Q22 Intake Manifold Tuning Solenoid Valve – Q38 Throttle Body Accelerator Pedal Position = Less than 0.05% Deceleration Fuel Cut-Off = Active Engine = Running Engine Coolant Temperature Sensor = 68 to 126°C (154 to 259°F) Fuel Temperature Sensor = 5 to 80°C (41 to 176°F) Transmission = Gear 4, 5, 6 Vehicle Speed Sensor = Greater than 0 km/h (0 MPH) Frequency the DTC runs = Continuously — After the running conditions are met Conditions for Setting the DTC Fuel Injector Small Quantity Adjustment = Not within a calibrated range Actions Taken When the DTC Sets DTCs listed in the DTC Descriptor category = Type B DTC Conditions for Clearing the DTC DTCs listed in the DTC Descriptor category = Type B DTC Reference Information Engine Controls Schematics Connector End View Reference Master Electrical Component List Electrical Information Reference Circuit Testing Connector Repairs Testing for Intermittent Conditions and Poor Connections Wiring Repairs DTC Type Reference Powertrain Diagnostic Trouble Code (DTC) Type Definitions Scan Tool Reference Control Module References Special Tools CH-51450-A Oscilloscope Diagnostic Kit CH-51450-LEAD-A Oscilloscope Basic Lead Kit Equivalent regional tools: Special Tools Circuit/System Verification

1. Ignition » On / Vehicle » In Service Mode
2. Verify there are no DTCs set related to the following component/system: Fuel System ⇒ If a related DTC is set Refer to: Diagnostic Trouble Code (DTC) List - Vehicle ⇓ If a related DTC is not set
3. 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.
4. Verify the DTC does not set. ⇒ If the DTC sets Refer to: Circuit/System Testing ⇓ If the DTC is not set
5. All OK. Circuit/System Testing
6. Ignition/Vehicle » Off
7. Disconnect the electrical connector: X160 Inline Harness Connector
8. Ignition » On / Vehicle » In Service Mode

Note

Testing for steps 4 to 5 is performed on the control module K20 side of the harness connector.

4. Test for 16 V (±3 V) between the test points: { Q17A Fuel Injector 1 } Control circuit terminal 1 & Ground { Q17B Fuel Injector 2 } Control circuit terminal 3 & Ground { Q17C Fuel Injector 3 } Control circuit terminal 5 & Ground { Q17D Fuel Injector 4 } Control circuit terminal 7 & Ground { Q17E Fuel Injector 5 } Control circuit terminal 9 & Ground { Q17F Fuel Injector 6 } Control circuit terminal 11 & Ground ⇒ If not the specified value Refer to: DTC P0201-P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, P0277, P1248-P124D, P2147, P2148, P2150, P2151, P2153, or P2154 ⇓ If the specified value
5. Test for 0.20 V (±0.17 V) between the test points: { Q17A Fuel Injector 1 } Control circuit terminal 2 & Ground { Q17B Fuel Injector 2 } Control circuit terminal 4 & Ground { Q17C Fuel Injector 3 } Control circuit terminal 6 & Ground { Q17D Fuel Injector 4 } Control circuit terminal 8 & Ground { Q17E Fuel Injector 5 } Control circuit terminal 10 & Ground { Q17F Fuel Injector 6 } Control circuit terminal 12 & Ground ⇒ If not the specified value Refer to: DTC P0201-P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, P0277, P1248-P124D, P2147, P2148, P2150, P2151, P2153, or P2154 ⇓ If the specified value

Note

Testing for steps 6 to 7 is performed on the component side of the harness connector.

6. Test for less than 3 Ω between the test points: { Q17A Fuel Injector 1 } Control circuit terminal 1 & Control circuit terminal 2 { Q17B Fuel Injector 2 } Control circuit terminal 3 & Control circuit terminal 4 { Q17C Fuel Injector 3 } Control circuit terminal 5 & Control circuit terminal 6 { Q17D Fuel Injector 4 } Control circuit terminal 7 & Control circuit terminal 8 { Q17E Fuel Injector 5 } Control circuit terminal 9 & Control circuit terminal 10 { Q17F Fuel Injector 6 } Control circuit terminal 11 & Control circuit terminal 12 ⇒ If 3 Ω or greater 6.1. Verify a condition does not exist with the component: Q17 Fuel Injector » Refer to: Component Testing ⇒ If a condition exists » Replace the component: Q17 Fuel Injector ⇒ If no condition exists » Repair the open/high resistance in the circuit. ⇓ If less than 3 Ω
7. Verify the tool is available: CH-51450-A Oscilloscope Diagnostic Kit & CH-51450-LEAD-A Oscilloscope Basic Lead Kit ⇒ If the tool is not available 7.1. Perform the following procedure/test: Engine Compression Test Verify the procedure/test passes. ⇒ If the procedure/test does not pass Refer to: Symptoms - Engine Mechanical ⇓ If the procedure/test passes 7.2. Test or replace the component: Q17 Fuel Injector ⇓ If the tool is available
8. Perform the following procedure/test: Relative Engine Compression Test Verify the procedure/test passes. ⇒ If the procedure/test does not pass Refer to: Symptoms - Engine Mechanical ⇓ If the procedure/test passes
9. Test or replace the component: Q17 Fuel Injector Component Testing
10. Ignition/Vehicle » Off
11. Disconnect the appropriate electrical connector: Q17 Fuel Injector

Note

The specified resistances are valid for components at room temperature.

3. Test for 0.2 to 1.5 Ω between the test points: Component terminal 1 & Component terminal 2 ⇒ If not between 0.2 and 1.5 Ω Replace the component: Q17 Fuel Injector ⇓ If between 0.2 and 1.5 Ω
4. Test for infinite resistance between the test points: Each terminal of the component & The component’s housing ⇒ If less than infinite resistance Replace the component: Q17 Fuel Injector ⇓ If infinite resistance
5. All OK. Repair Instructions Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair Verification High Pressure Diesel Fuel Injector Replacement For control module replacement, programming, and setup refer to: Control Module References