• | 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 provide an overview of each diagnostic category. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
Turbocharger Vane Position Control Solenoid Valve High Control | P003A, P0047, P0401 | P003A, P0047, P0401 | -- | P003A, P0401 |
Turbocharger Vane Position Reference Solenoid Valve Low Control | P003A, P0047, P0401 | P003A, P0047, P0401 | P003A, P0048, P0401 | P003A, P0401 |
The engine control module (ECM) performs the turbocharger (TC) learn procedure automatically when the enabling criteria’s have been met. After each ignition cycle, and before the enable criteria have been met, the ECM will use the previously learned value. If the ECM does not have a previously learn value, it will default to a stored calibrated value.
The ECM performs the self learn by commanding the TC vanes to 0 percent, then to 100 percent, while monitoring the TC vane position sensor.
The positions of the TC vanes are controlled by the ECM. The ECM utilizes a TC vane control solenoid and a TC vane position sensor to control the TC vanes. The ECM will vary the boost dependant upon the load requirements of the engine. The vane control solenoid has 2 circuits, a high voltage control circuit and a low voltage control circuit. The ECM uses a pulse width modulation (PWM) on the high control and low control circuits to control the solenoid. The ECM will detect if the automatic TC learn has failed if the commanded vane position did not match the actual vane position by a calibrated threshold.
• | DTCs P0107, P0108, P0117, P0118, P2563, P2564, P2565, P2228, P2229 are not set. |
• | The battery voltage is equal to or greater than 11 volts. |
• | The ECM is commanding the turbocharger vanes open or closed during a position learn process. |
• | The engine speed is between 600-750 RPM. |
• | The engine coolant temp (ECT) is between 73-96°C (163-205°F). |
• | The calculated fuel rate is less than 30 mm³. |
• | DTC P003A runs once per key cycle when the above conditions are met. |
The ECM did not detect a valid learn within 30 seconds.
DTC P003A is a Type B DTC.
DTC P003A is a Type B DTC.
• | If there is a loss of ignition voltage to the ECM terminal C1-76 this DTC may set. Verify this circuit is not shorted to ground/open, or the supply fuse for this circuit is not open. |
• | If any service has been performed on the turbocharger or on the turbocharger components, a turbocharger relearn must be performed. Failure to perform the turbocharger learn procedure may cause other DTCs to set. Refer to Turbocharger Learn . |
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
J 34730-405 Injector Test Lamp
⇒ | If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle . |
Important: You must perform the Circuit/System Verification before proceeding with Circuit/System Testing.
Important: When the engine coolant temperature is less than 70°C (158°F), the test lamp will change brightness when commanded with a scan tool. When the engine coolant temperatures are above 70°C (158°F), the test lamp will flash ON and OFF without commands from a scan tool.
⇒ | If the test lamp does not illuminate, test the low control circuit terminal B for an open/high resistance or a short to voltage. If the circuit tests normal, test the high control circuit terminal A for a short to ground or an open/high resistance. If the circuits test normal, replace the ECM. |
⇒ | If the test lamp remains illuminated, test the low control circuit terminal B for a short to ground. |
Important: The resistance of the TC control solenoid will vary with the temperature.
⇒ | If the resistance is not within the specified range, replace the TC control solenoid. |
⇒ | If less than infinite resistance, replace the TC control solenoid. |
• | The ECM C1 TC solenoid high control circuit terminal 48 to TC control solenoid terminal A. |
• | The ECM C1 TC solenoid low control circuit terminal 96 to TC control solenoid terminal B. |
• | The ECM C1 TC sensor signal circuit terminal 20 to TC position sensor terminal B. |
• | The ECM C1 TC sensor low reference terminal 63 to TC position sensor terminal C. |
• | The ECM C1 TC sensor 5-volt reference terminal 13 to TC position sensor terminal D. |
⇒ | If greater than the specified range, repair the high resistance in the affected circuit. |
⇒ | If the voltage parameter does not change gradually and smoothly, replace the TC control solenoid. |
Important: You must perform the Circuit/System Testing in order to verify the integrity of the TC vane position sensor circuits before proceeding with the Component Testing.
⇒ | If the TC Vane Position Sensor parameter is erratic, replace the TC vane position sensor. |
• | Control Module References for ECM replacement, setup, and programming |