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This instruction show you guide on how to repair ISUZU F-series P0045 turbocharger boost control solenoid circuit error.
Preparations:
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DTC P0045 description
The position of the turbocharger nozzle is controlled by the VGS control unit based on commands from the ECM. The VGS control unit controls the drive signal to the actuator installed to the turbocharger by utilizing position sensor inputs to control the turbocharger nozzles. If no load is applied to the engine, the nozzle is open or there is no boost pressure. When a load is applied to the engine, the VGS control unit controls the motor and closes the turbocharger nozzle. As a result, boost pressure is increased. The ECM controls changes in boost pressure according to the load requirements of the engine. The VGS control unit has the ability to perform internal diagnostics for voltage and signal input and output status. If the VGS control unit detects a nozzle position signal malfunction, motor control signal malfunction, or VGS control unit voltage malfunction, the VGS control unit sends a message to the ECM via the CAN communication circuit and the DTC is set.
Condition for setting DTC P0045
Condition for running the DTC
- The battery voltage is 20 to 32 V.
- The ignition switch is ON.
Condition for setting the DTC
Any of the following are met:
- The VGS control unit detects an excessively high voltage.
- The VGS control unit detects that all position sensor signals are in Low or High condition and have not changed.
- The VGS control unit detects an open circuit, a short to ground, or a short to the power supply circuit in the motor circuit.
- The VGS control unit detects that the motor or nozzle control is stuck.
Action taken when DTC P0045 sets
- The ECM illuminates the check engine warning light. Refer to Action taken when DTC sets
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