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Engine > Engine control and fuel system - 2.0L Diesel (LCD, LBS, LBX, LBY) > Other Information > DTC P0399, P039C, P039D, P03A3, P03A6, P03A7, P03AD, P03B0, P03B1, P03B7, P03BA, or P03BB

DTC P0399, P039C, P039D, P03A3, P03A6, P03A7, P03AD, P03B0, P03B1, P03B7, P03BA, or P03BB

Diagnostic Instructions

    •  Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
    •  Review Strategy Based Diagnosis for an overview of the diagnostic approach.
    •  Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC P0399 00:  Cylinder 1 Pressure Sensor Circuit Erratic

DTC P039C 00:  Cylinder 1 Pressure Variation Too Low

DTC P039C 01:  Cylinder 1 Pressure Variation Too Low

DTC P039C 02:  Cylinder 1 Pressure Variation Too Low

DTC P039D 00:  Cylinder 1 Pressure Variation Too High

DTC P03A3 00:  Cylinder 2 Pressure Sensor Circuit Erratic

DTC P03A6 00:  Cylinder 2 Pressure Variation Too Low

DTC P03A6 01:  Cylinder 2 Pressure Variation Too Low

DTC P03A6 02:  Cylinder 2 Pressure Variation Too Low

DTC P03A7 00:  Cylinder 2 Pressure Variation Too High

DTC P03AD 00:  Cylinder 3 Pressure Sensor Circuit Erratic

DTC P03B0 00:  Cylinder 3 Pressure Variation Too Low

DTC P03B0 01:  Cylinder 3 Pressure Variation Too Low

DTC P03B0 02:  Cylinder 3 Pressure Variation Too Low

DTC P03B1 00:  Cylinder 3 Pressure Variation Too High

DTC P03B7 00:  Cylinder 4 Pressure Sensor Circuit Erratic

DTC P03BA 00:  Cylinder 4 Pressure Variation Too Low

DTC P03BA 01:  Cylinder 4 Pressure Variation Too Low

DTC P03BA 02:  Cylinder 4 Pressure Variation Too Low

DTC P03BB 00:  Cylinder 4 Pressure Variation Too High

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

5V Reference

P0397 00, P03A1 00, P03AB 00, P03B5 00

P0397 00, P03A1 00, P03AB 00, P03B5 00

P0398 00, P03A2 00, P03AC 00, P03B6 00

-

Signal

P0397 00, P03A1 00, P03AB 00, P03B5 00

P0398 00, P03A2 00, P03AC 00, P03B6 00

P0398 00, P03A2 00, P03AC 00, P03B6 00

P0399 00, P039C 00, P039C 01, P039C 02, P039D 00, P03A3 00, P03A6 00, P03A6 01, P03A6 02, P03A7 00, P03AD 00, P03B0 00, P03B0 01, P03B0 02, P03B1 00, P03B7 00, P03BA 00, P03BA 01, P03BA 02, P03BB 00

Low Reference

-

P0398 00, P03A2 00, P03AC 00, P03B6 00

-

-

Typical Scan Tool Data

Cylinder 1 Maximum Combustion Pressure, Cylinder 2 Maximum Combustion Pressure, Cylinder 3 Maximum Combustion Pressure, Cylinder 4 Maximum Combustion Pressure

Circuit

Short to Ground

Open

Short to Voltage

Operating Conditions: engine running

Parameter Normal Range: 0-9 000 kPa (0-1,306 PSI)

5V Reference

0

0

-

Signal

0

10 000

10 000

Low Reference

10 000

10 000

-

Circuit/System Description

The cylinder pressure sensor is combined with the glow plug. The engine control module (ECM) provides a 5 V reference voltage, a low reference and a signal circuit to each cylinder pressure sensor.

The function receives the position of the pressure maximum in overrun as input variable and uses it to determine and correct the displacement of the pressure curve.

The function accomplishes the following tasks:

    •  Determining the exact top dead centre (TDC) position.
    •  Correction of the TDC angle displacement based on the mounting error of the toothed wheel.
    •  Storing the correction values in the EEPROM.

Conditions for Running the DTC

    •  Ignition ON
    •  Engine running
    •  The above conditions must be met for at least 0.2 s.

Conditions for Setting the DTC

The ECM detects that the cylinder pressure sensor signal is out of range for more than 0.2 s

Action Taken When the DTC Sets

DTCs P0399, P03A1, P03AB, P03B5, P0398, P03A2, P03AC and P03B6 are Type B DTCs.

Conditions for Clearing the DTC

DTCs P0397, P03A1, P03AB, P03B5, P0398, P03A2, P03AC and P03B6 are Type B DTCs.

Reference Information

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Component Connector End Views

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Wiring Repairs


DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

  1. Clear the DTCs with a scan tool.
  2. Operate the vehicle within the conditions for running and setting the DTC. The DTC should 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.

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the affected Glow Plug/Pressure Sensor Assembly.
  2. Ignition OFF, test for less than 5 Ω between the low reference circuit terminal 1 and ground.
  3. If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.
  4. Ignition ON, test for 4.8-5.2V between the 5 V reference circuit terminal 3 and ground.
  5. If less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.
    If greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the K20 Engine Control Module.
  6. Verify the scan tool Cylinder Maximum Combustion Pressure parameter is greater than 10 000 kPa (1,450 PSI).
  7. If less than the specified range, test the signal circuit terminal 2 for a short to ground. If the circuit tests normal, replace the K20 Engine Control Module.
  8. Install a 3A fused jumper wire between the signal circuit terminal 2 and the low reference circuit terminal 1. Verify the scan tool Cylinder Maximum Combustion Pressure parameter is less than 50 kPa (7.25 PSI).
  9. If greater than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.
  10. If all circuits test normal, test or replace the affected Glow Plug/Pressure Sensor Assembly.

Component Testing

Static Test

  1. Ignition OFF, disconnect the harness connector at the affected Glow Plug/Pressure Sensor Assembly.
  2. Test for 3-12 Ω between the 5 V reference terminal 3 and the low reference terminal 1.
  3. If not within the specified range, replace the affected Glow Plug/Pressure Sensor Assembly.
  4. Test for infinite resistance between each terminal and the sensor housing/case.
  5. If not the specified value, replace the affected Glow Plug/Pressure Sensor Assembly.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  Glow Plug Replacement
    •  Control Module References for ECM replacement, setup and programming

Engine > Engine control and fuel system - 2.0L Diesel (LCD, LBS, LBX, LBY) > Other Information > DTC P0399, P039C, P039D, P03A3, P03A6, P03A7, P03AD, P03B0, P03B1, P03B7, P03BA, or P03BB

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