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DTC P052E or P053A-P053C

DTC P052E or P053A-P053C

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 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
Ignition

P053A 00

P053A 00

-

-

Output Control

P053B 00

P053A 00

P053C 00

P052E 00



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


The ignition is ON or the engine is running.

The DTCs run continuously when the above conditions are met.


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


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 for scan tool information

Circuit/System Verification


DTC P052E, P053A, P053B or P053C should not set.

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.


Circuit/System Testing


1. Ignition OFF, disconnect the harness connector at the E45 Crankcase Ventilation Heater.

2. Ignition ON, 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, test or replace the K20 Engine Control Module.

4. Test for 3.0-4.0 V between the low reference circuit and ground.

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.

6. 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.

7. Test for greater than 9 V between the control circuit and ground.

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.

9. If all circuits test normal, test or replace the E45 Crankcase Ventilation Heater.


Component Testing


Static Test

1. Ignition OFF, disconnect the harness connector at the E45 Crankcase Ventilation Heater.

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.

3. If not within the specified range, replace the E45 Crankcase Ventilation Heater.

4. Test for infinite resistance between each terminal and the E45 Crankcase Ventilation Heater housing.

5. If not the specified value, replace the E45 Crankcase Ventilation Heater.


Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Engine Control Module Replacement for ECM replacement, setup, and programming