DTC P0244-P0246 (LDK With Turbocharger)
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DTC P0244-P0246 (LDK With Turbocharger)
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DTC P0244
Turbocharger Wastegate Solenoid Control Circuit
DTC P0245
Turbocharger Wastegate Solenoid Control Circuit Low Voltage
DTC P0246
Turbocharger Wastegate Solenoid Control Circuit High Voltage
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Diagnostic Fault Information
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Circuit
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Short to Ground
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High Resistance
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Open
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Short to Voltage
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Signal Performance
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Ignition 1 Voltage Circuit
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P0010, P0013, P0033, P0034, P0245, P2088, P2090
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P0244
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P0244, P0245
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Turbocharger Wastegate Solenoid Control Circuit
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P0245
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P0244
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P0244
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P0246
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P0244
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Circuit/System Description
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The BorgWarner™ dual-scroll turbocharger incorporates a wastegate that is controlled by a pressure differential, that is determined by the engine control module (ECM) by means of a PWM solenoid, in order to regulate the pressure ratio of the compressor. A charge air bypass valve also controlled by the ECM by utilizing a remotely mounted solenoid is integrated into the unit to prevent compressor surging and damage from vibrations by opening during abrupt closed throttle conditions. When the bypass valve is open during closed throttle deceleration conditions, the bypass valve allows the air to recirculate in the turbocharger and maintain compressor speed. Within a calibrated range during the closed throttle event, or upon a wide open throttle command the bypass valve will then close to optimize turbo response. The turbocharger wastegate actuator has the following circuits:
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Turbocharger wastegate solenoid control
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At idle the Turbocharger Wastegate Solenoid parameter is commanded to 0% by the ECM. When the engine load and RPM first increases under a wide open throttle, the Turbocharger Wastegate Solenoid parameter should briefly be commanded as great as 90-100%. When the proper level of boost pressure is attained, the ECM will decrease the PWM of the solenoid to a range of 65-85%. As soon as the throttle closes the ECM will command the Turbocharger Wastegate Solenoid parameter back to 0%, in order to allow the turbocharger waste gate to open from the air pressure ratio differential, thereby reducing the speed of the turbine.
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Conditions for Running the DTCs
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The engine speed is greater than 80 RPM.
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The battery voltage is between 10-18 V.
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This DTC runs continuously within the enabling conditions.
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Conditions for Setting the DTCs
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The ECM detects an open, a short to ground, or a short to voltage on the turbocharger wastegate solenoid control circuit for greater than 4 s continuously, or 50 s cumulative.
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Action Taken When the DTCs Set
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DTCs P0244, P0245, and P0246 are Type B DTCs.
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An indicator will illuminate.
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The ECM will disable boost control and limit the system to mechanical boost only, resulting in a substantial decrease in engine power.
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Conditions for Clearing the MIL/DTC
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DTCs P0244, P0245, and P0246 are Type B DTCs.
Schematic Reference
Engine Controls Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References
for scan tool information
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Circuit/System Verification
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Perform an inspection of the turbocharger.
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Use the scan tool output controls to command the Turbocharger Wastegate Solenoid parameter from 0-100%. An audible series of clicks when the command is between 20-90% should be heard and felt.
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Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
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1.
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Clear the DTCs with a scan tool.
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2.
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Inspect for damage to the turbocharger wastegate actuator.
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3.
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Ignition OFF, disconnect the harness connector at the Q42 turbocharger wastegate actuator.
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4.
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Ignition ON, verify that a test lamp illuminates between the voltage supply circuit terminal 2 and ground.
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5.
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If a test lamp does not illuminate, test the voltage supply circuit for a short to ground or an open/high resistance.
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6.
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Verify that a test lamp does not illuminate between the control circuit terminal 1 and ground.
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7.
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If the test lamp illuminates, test the control circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.
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8.
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Connect a test lamp between the control circuit terminal 1 and the voltage supply circuit terminal 2.
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9.
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Command the Turbocharger Wastegate Solenoid parameter to 50% with a scan tool. The test lamp should illuminate and flash rapidly when commanded to 50% and turn OFF when commanded to 0%.
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10.
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If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the K20 ECM.
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11.
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If the test lamp is always OFF, test the control circuit for an open/high resistance. If the circuit tests normal, replace the K20 ECM.
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12.
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If the circuits test normal, test or replace the Q42 turbocharger wastegate actuator.
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Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.
