DTC P0045
DTC P0045: Turbocharger Wastegate Control Actuator Circuit Malfunction
General Description
The powertrain control module (PCM) adjusts the boost pressure by controlling the turbocharger wastegate control actuator of the turbocharger. Boost pressure becomes higher by fully closing the turbocharger wastegate control valve driven by the turbocharger wastegate control actuator. The turbocharger wastegate control valve position is detected by the turbocharger wastegate control actuator position sensor and the signal is input to the PCM for target position feedback control. The turbocharger wastegate control actuator position sensor value when the turbocharger wastegate control valve is fully closed is stored as fully closed learning value.
Target and actual positions are represented by the relative value from the fully closed position. The PCM sets a target position, and outputs a drive signal to the driver IC and drives the turbocharger wastegate control actuator to be equal to the target position. If the turbocharger wastegate control actuator current is out of normal range for a specified time, the PCM detects a malfunction and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type
| Execution | Continuous |
| Sequence | None |
| Duration | 2 seconds or more |
| DTC Type | One drive cycle, MIL on |
Enable Conditions
| Condition | Minimum | Maximum |
|---|---|---|
| 12 volt battery voltage [ Battery] | 10 V | - |
| Vehicle | ON mode | |
| [ ]: HDS Parameter | ||
Malfunction Threshold
Either of the conditions is met for at least 2 seconds:
- The turbocharger wastegate control actuator current is 9 A or more.
- The turbocharger wastegate control actuator current is 0.7 A or less when the turbocharger wastegate control actuator is in control.
Possible Cause
The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
- Turbocharger wastegate control actuator WGMTR1 line open
- Turbocharger wastegate control actuator WGMTR2 line open
- Turbocharger wastegate control actuator WGMTR1 line short to ground
- Turbocharger wastegate control actuator WGMTR2 line short to ground
- Turbocharger wastegate control actuator WGMTR1 line short to turbocharger wastegate control actuator WGMTR2 line
- Turbocharger wastegate control actuator driver failure
- Turbocharger wastegate control actuator failure
Confirmation Procedure
Operating Condition
None.
With the HDS
- Start the engine. Hold the engine speed [ Engine Speed] at 3000 RPM without load (in P or N) until the radiator fan comes on, then let it idle for 2 minutes.
- Select the Electric Waste Gate in the Function Test with the HDS.
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected, the MIL comes on and a Pending DTC, a Confirmed DTC, the freeze data, and the on-board snapshot are stored in the PCM memory.
Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, the freeze data, and the on-board snapshot can be cleared with the scan tool Clear command or by disconnecting the 12 volt battery.