ECD SYSTEM, Diagnostic DTC:P0045

DTC Code DTC Name
P0045 Turbocharger / Supercharger Boost Control Solenoid Circuit / Open

DESCRIPTION

The turbocharger system is comprised of the Variable Nozzle (VN) type turbocharger, turbo motor driver and ECM.

The turbocharger has a nozzle vane which opens and closes to control the volume of the exhaust gas flowing into the turbine. This, in turn, controls the boost pressure. When the nozzle vane moves towards the closing direction, the pressure increases. When the vane moves towards the opening direction, the pressure decreases.

The turbocharger actuator built on the turbine side activates the nozzle vane. The nozzle vane position sensor built on the actuator detects the opening angle of the nozzle vane. The nozzle vane position sensor signal is sent via the turbo motor driver to the ECM. Then, based on the signal, the ECM actuates the actuator.

The ECM sends a target nozzle vane position signal to the turbo motor driver to obtain the nozzle vane position for the optimal boost pressure in accordance with the driving conditions.

DTC No. DTC Detection Condition Trouble Area
P0045 Open or short in VN turbo control circuit for 1 second or more (1 trip detection logic)

  • Open or short in VN turbo control circuit

  • Turbocharger

  • Turbocharger actuator

  • ECM

WIRING DIAGRAM

A01CILSE01

INSPECTION PROCEDURE

Tech Tips

Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

PROCEDURE


  1. INSPECT TURBOCHARGER SUB-ASSEMBLY


    1. Inspect the turbocharger Click here.


    NG

    REPLACE TURBOCHARGER SUB-ASSEMBLY

    OK

  2. CHECK HARNESS AND CONNECTOR (ECM - TURBOCHARGER ACTUATOR)


    1. A01CGQ1E02

      Disconnect the ECM connector.

    2. Disconnect the turbocharger actuator connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance
      Check for open
      Tester Connection Condition Specified Condition
      E23-29 (VNTI) - T8-5 (PWM OUT) Always Below 1 Ω
      E23-21 (VNTO) - T8-2 (PWM IN) Always Below 1 Ω
      Check for short
      Tester Connection Condition Specified Condition
      E23-29 (VNTI) or T8-5 (PWM OUT) - Body ground Always 10 kΩ or higher
      E23-21 (VNTO) or T8-2 (PWM IN) - Body ground Always 10 kΩ or higher

    4. Reconnect the turbocharger actuator connector.

    5. Reconnect the ECM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - TURBOCHARGER ACTUATOR)

    OK

    REPLACE ECM