PRE-RELEASE
DTC P052E or P053A-P053C
| DTC P052E or P053A-P053C |
| 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 P052E 00
Positive Crankcase Ventilation Heater Performance
DTC P053A 00
Positive Crankcase Ventilation Heater Control Circuit Malfunction
DTC P053B 00
Positive Crankcase Ventilation Heater Control Circuit Low Voltage
DTC P053C 00
Positive Crankcase Ventilation Heater Control Circuit High Voltage
| Diagnostic Fault Information |
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
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Ignition
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P053A 00
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P053A 00
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-
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Output Control
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P053B 00
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P053A 00
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P053C 00
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P052E 00
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| Circuit/System Description |
The positive crank case ventilation heater is controlled by the ECM. Ignition voltage is directly supplied to the positive crank case ventilation heater and the ECM provides a controlled ground circuit.
| Conditions for Running the DTC |
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The ignition is ON or the engine is running.
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The DTCs run continuously when the above conditions are met.
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| Conditions for Setting the DTC |
P052E
The ECM detects an over temperature at the output powerstage when the positive crank case ventilation heater is commanded ON.P053A
The ECM detects an open circuit when the positive crank case ventilation heater is commanded ON.P053B
The ECM detects a short to ground when the positive crank case ventilation heater is commanded ON.P053C
The ECM detects a short to voltage when the positive crank case ventilation heater is commanded ON.| Action Taken When the DTC Sets |
DTCs P052E, P053A, P053B and P053C are Type A DTCs.
| Conditions for Clearing the DTC |
DTCs P052E, P053A, P053B and P053C are Type A 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 for scan tool information
| Circuit/System Verification |
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DTC P052E, P053A, P053B or P053C should not set.
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Run the vehicle under the Conditions for Running the DTCs. You can also run the vehicle under the conditions you noted in data for the snapshots/fault register.
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| Circuit/System Testing |
| 1. |
Ignition OFF, disconnect the harness connector at the E45 Crankcase Ventilation Heater.
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| 2. |
Ignition ON, 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, test or replace the K20 Engine Control Module.
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| 4. |
Test for 3.0-4.0 V between the low reference circuit and ground.
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| 5. |
If greater than the specified range, test the low reference circuit for a short to voltage. If the circuit tests normal, test or replace the K20 Engine Control Module.
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If less than the specified range, test the low reference circuit for a short to ground. If the circuit tests normal, test or replace the K20 Engine Control Module.
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| 7. |
Test for greater than 9 V between the control circuit and ground.
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| 8. |
If less than the specified range, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the K20 Engine Control Module.
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| 9. |
If all circuits test normal, test or replace the E45 Crankcase Ventilation Heater.
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| Component Testing |
Static Test
| 1. |
Ignition OFF, disconnect the harness connector at the E45 Crankcase Ventilation Heater.
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| 2. |
Test for 6.0-10.0 Ω between the control terminal 1 and the low reference terminal 2 of the E45 Crankcase Ventilation Heater.
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| 3. |
If not within the specified range, replace the E45 Crankcase Ventilation Heater.
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| 4. |
Test for infinite resistance between each terminal and the E45 Crankcase Ventilation Heater housing.
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| 5. |
If not the specified value, replace the E45 Crankcase Ventilation Heater.
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| Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Engine Control Module Replacement for ECM replacement, setup, and programming
