PRE-RELEASE
DTC P0244-P0246
| DTC P0244-P0246 |
| 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 P0244
Turbocharger Wastegate Solenoid Valve Control Performance
DTC P0245
Turbocharger Wastegate Solenoid Valve Control Circuit Low Voltage
DTC P0246
Turbocharger Wastegate Solenoid Valve Control Circuit High Voltage
| Diagnostic Fault Information |
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
| Ignition 1 Voltage Circuit | P0010, P0030, P0033, P0034, P0134, P0244, P0245, P0458, P2088, P2090, P2092, P2094* | P0010, P0030, P0134, P0244, P0245, P0458, P2088, P2090, P2092, P2094 | - | P0244 |
| Turbocharger Wastegate Solenoid Valve Control Circuit | P0245 | P0244 | P0246 | P0244 |
| *Opens the fuse that supplies voltage to the turbocharger wastegate solenoid. | ||||
| Circuit/System Description |
The engine control module (ECM) controls boost using the turbocharger wastegate solenoid valve . The wastegate valve is actuated by a rod from the diaphragm box located at the housing. A spiral spring by the diaphragm works in the closing direction while the pressure in the diaphragm works in the opening direction. The ECM supplies a pulse width modulation (PWM) signal to a solenoid valve, which then allows pressure from the turbo to come through. When the pressure overcomes the spring force of the diaphragm, the rod begins to move, opening the wastegate valve to a corresponding degree. The ECM changes wastegate valve opening by varying the PWM signal, which regulates the turbine speed. Ignition voltage is supplied directly to the wastegate's Solenoid Valve. The ECM controls the solenoid valve by grounding the control circuit with a solid state device called a driver. The driver is equipped with a feedback circuit that is pulled-up to a voltage. The ECM can determine if the control circuit is open, shorted to ground, or shorted to a voltage by monitoring the feedback voltage.
| 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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The ECM has commanded the wastegate solenoid valve ON and OFF at least once during the ignition cycle.
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The DTCs run continuously within the enabling conditions.
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| Conditions for Setting the DTCs |
P0244
The ECM detects the wastegate solenoid valve control circuit is open.P0245
The ECM detects the wastegate solenoid valve control circuit is shorted to ground.P0246
The ECM detects the wastegate solenoid valve control circuit is shorted to voltage.| Action Taken When the DTCs Set |
DTCs P0244, P0245, P0246 are Type B DTCs.
| Conditions for Clearing the MIL/DTCs |
DTCs P0244, P0245, P0246 are Type B DTCs.
| Reference Information |
Schematic Reference
Engine Controls Schematics (3.0L (LF1)) Engine Controls Schematics (2.8L (LAU))
Connector End View Reference
Component Connector End Views
Description and Operation
Turbocharger System Description
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 |
| 1. |
Engine running, command the Turbocharger Wastegate Solenoid Valve to 20% with a scan tool while observing the following control circuit status parameters:
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Turbocharger Wastegate Solenoid Valve Control Circuit High Voltage Test Status
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Turbocharger Wastegate Solenoid Valve Control Circuit Open Test Status
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Turbocharger Wastegate Solenoid Valve Control Circuit Low Voltage Test Status
Each parameter should display OK. |
| 2. |
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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| Circuit/System Testing |
| 1. |
Inspect the turbocharger and the wastegate solenoid valve for damage. Refer to
Turbocharger Cleaning and Inspection
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| 2. |
Ignition OFF, disconnect the harness connector at the Q42 turbocharger wastegate solenoid valve .
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| 3. |
Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 1 and ground.
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| 4. |
If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition circuit fuse is open, test all components connected to the ignition circuit and replace as necessary.
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Connect a test lamp between the control circuit terminal 2 and the ignition circuit terminal 1.
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| 6. |
Command the Turbocharger Wastegate Solenoid Valve to 50% with a scan tool. The test lamp should illuminate when commanded to 50% and turn OFF when commanded to 0%.
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| 7. |
If the test lamp is always ON, test the control circuit terminal 2 for a short to ground. If the circuit tests normal, replace the K20 ECM.
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| 8. |
If the test lamp is always OFF, test the control circuit terminal 2 for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K20 ECM.
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| 9. |
Test for 2.6-4.6 V between the control circuit terminal 2 and ground.
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| 10. |
If the voltage is not within the specified range, replace the K20 ECM.
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| 11. |
If all circuits test normal, test or replace the Q42 turbocharger wastegate solenoid valve.
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| Component Testing |
| 1. |
Ignition OFF, disconnect the harness connector at the Q42 turbocharger wastegate solenoid valve.
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| 2. |
Test for 20-30 Ω between the control terminal 2 and the ignition terminal 1 of the Q42 turbocharger wastegate solenoid valve.
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If not within the specified range, replace the Q42 turbocharger wastegate solenoid valve.
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| 4. |
Test for infinite resistance between each terminal and the Q42 turbocharger wastegate solenoid valve housing.
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| 5. |
If not the specified value, replace the Q42 turbocharger wastegate solenoid valve.
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| Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
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Turbocharger Disassemble
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Control Module References
for engine control module replacement, setup, and programming
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