DTC P0397, P0398, P03A1, P03A2, P03AB, P03AC, P03B5, or P03B6
| DTC P0397, P0398, P03A1, P03A2, P03AB, P03AC, P03B5, or P03B6 |
| Diagnostic Instructions |
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Perform the
Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
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Review
Strategy Based Diagnosis
for an overview of the diagnostic approach.
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Diagnostic Procedure Instructions
provides an overview of each diagnostic category.
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| DTC Descriptors |
DTC P0397 00
Cylinder 1 Pressure Sensor Circuit Low Voltage
DTC P0398 00
Cylinder 1 Pressure Sensor Circuit High Voltage
DTC P03A1 00
Cylinder 2 Pressure Sensor Circuit Low Voltage
DTC P03A2 00
Cylinder 2 Pressure Sensor Circuit High Voltage
DTC P03AB 00
Cylinder 3 Pressure Sensor Circuit Low Voltage
DTC P03AC 00
Cylinder 3 Pressure Sensor Circuit High Voltage
DTC P03B5 00
Cylinder 4 Pressure Sensor Circuit Low Voltage
DTC P03B6 00
Cylinder 4 Pressure Sensor Circuit High Voltage
| Diagnostic Fault Information |
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
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5V Reference
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P0397 00, P03A1 00, P03AB 00, P03B5 00
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P0397 00, P03A1 00, P03AB 00, P03B5 00
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P0398 00, P03A2 00, P03AC 00, P03B6 00
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-
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Signal
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P0397 00, P03A1 00, P03AB 00, P03B5 00
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P0398 00, P03A2 00, P03AC 00, P03B6 00
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P0398 00, P03A2 00, P03AC 00, P03B6 00
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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
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Low Reference
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-
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P0398 00, P03A2 00, P03AC 00, P03B6 00
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-
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-
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| 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 |
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Operating Conditions:
Engine running
Parameter Normal Range: 0-9000 kPa (0-1,306 PSI) |
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5V Reference
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0
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0
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-
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Signal
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0
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10 000
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10 000
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Low Reference
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10 000
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10 000
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-
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| Circuit/System Description |
The cylinder pressure sensor is combined with the glow plug. The engine control module (ECM) provides a 5V 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:
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Determining the exact top dead center (TDC) position,
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Correction of the TDC angle displacement based on the mounting error of the toothed wheel,
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Storing the correction values in the EEPROM.
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| Conditions for Running the DTC |
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Ignition ON
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Engine running
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The above conditions must be met for at least 0.2 second.
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| Conditions for Setting the DTC |
P0397, P03A1, P03AB and P03B5
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The ECM detects that the cylinder pressure sensor signal voltage is less than the threshold for more than 2 seconds.
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This diagnostic runs once per operation cycle.
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P0398, P03A2, P03AC and P03B6
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The ECM detects that the cylinder pressure sensor signal voltage is greater than the threshold for more than 2 seconds.
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This diagnostic runs once per operation cycle.
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| Action Taken When the DTC Sets |
DTCs P0397, 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
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Circuit Testing
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Connector Repairs
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Testing for Intermittent Conditions and Poor Connections
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Wiring Repairs
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DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References
| Circuit/System Verification |
| 1. |
Clear the DTCs with a scan tool.
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| 2. |
Operate the vehicle within the conditions to run and set the DTC. The DTC should not be set.
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| 3. |
Run the vehicle within the Conditions for Running the DTCs. You may also operate the vehicle within the conditions that you have noted from the Freeze Frame/Failure Records data.
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| Circuit/System Testing |
| 1. |
Ignition OFF, disconnect the harness connector at the affected Glow Plug/Pressure Sensor Assembly.
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| 2. |
Ignition OFF, test for less than 5 Ω between the low reference circuit terminal 1 and ground.
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| 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.
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| 4. |
Ignition ON, test for 4.8-5.2V between the 5 V reference circuit terminal 3 and ground.
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| 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.
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| 6. |
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.
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| 7. |
Verify the scan tool Cylinder Maximum Combustion Pressure parameter is greater than 10,000 kPa (1,450 PSI).
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| 8. |
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.
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| 9. |
Install a 3 A 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).
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| 10. |
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.
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| 11. |
If all circuits test normal, test or replace the affected Glow Plug/Pressure Sensor Assembly.
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| Component Testing |
Static Test
| 1. |
Ignition OFF, disconnect the harness connector at the affected Glow Plug/Pressure Sensor Assembly.
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| 2. |
Test for 3-12 Ω between the 5 V reference terminal 3 and the low reference terminal 1.
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| 3. |
If not within the specified range, replace the affected Glow Plug/Pressure Sensor Assembly.
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| 4. |
Test for infinite resistance between each terminal and the sensor housing/case.
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| 5. |
If not the specified value, replace the affected Glow Plug/Pressure Sensor Assembly.
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| Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
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Glow Plug Replacement
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Control Module References
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