P0045
NOTE: The content of this article/image reflects the changes called out by TSB: 05-06-04-040.
DTC P0045
CIRCUIT DESCRIPTION
The position of the turbocharger vanes is controlled by the engine control module (ECM). The ECM utilizes a turbocharger vane control solenoid valve and a turbocharger vane position sensor to control the turbocharger vanes. When the engine is not under load, the turbocharger vanes are in an open position, or no boost condition. When the engine is under load, the ECM commands the control solenoid valve to close the turbocharger vanes, thus increasing the boost. The ECM will vary the boost dependant upon the load requirements of the engine. The vane control solenoid valve uses 2 circuits, a control circuit and a low reference circuit. The ECM uses a pulse width modulation on the control circuit to open and control the solenoid valve. The ECM provides a ground on the low reference circuit. If the ECM detects any circuit failure, DTC P0045 will set.
DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC P0045 Turbocharger Vane Position Control Solenoid Control Circuit
CONDITIONS FOR RUNNING THE DTC
- The engine run time is more than 30 seconds.
- DTC P0045 runs continuously once the above conditions are met.
CONDITIONS FOR SETTING THE DTC
- The control module detects that the commanded state of the driver and the actual state of the control circuit do NOT match.
- The above condition exists for more than 2 seconds.
ACTION TAKEN WHEN THE DTC SETS
- The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
- The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.
CONDITIONS FOR CLEARING THE MIL/DTC
- The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
- A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
- A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
- Clear the MIL and the DTC with a scan tool.
TEST
