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DTC P0045 [MZR-CD (RF Turbo)]

BME010200102237

DTC P0045 | Variable boost control (VBC) solenoid valve control circuit low or high input
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DETECTION CONDITION | • The PCM monitors the output signal when the PCM controls the variable boost control solenoid valve between 30 and 69%. If the current of the variable boost control solenoid valve is less than 0.8 A during variable boost control solenoid valve control, the PCM determines that there is a malfunction in the variable boost control solenoid valve control circuit. Diagnostic support note
• The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
• PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle.
• FREEZE FRAME DATA is available.
• The DTC is stored in the PCM memory.
POSSIBLE CAUSE | • VBC solenoid valve malfunction • Connector or terminal malfunction • Open circuit in wiring harness between PCM control relay terminal C and VBC solenoid valve terminal A • Open circuit in wiring harness between VBC solenoid valve terminal B and PCM terminal 67
• Short to GND in wiring harness between VBC solenoid valve terminal B and PCM terminal 67
• PCM malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has FREEZE FRAME DATA been recorded? | Yes | Go to the next step.
No | Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2 | VERIFY RELATED REPAIR INFORMATION AVAILABILITY • Verify related service repair information availability. • Is any related repair information available? | Yes | Perform repair or diagnosis according to the available repair information. • If the vehicle is not repaired, go to the next step.
No | Go to the next step.
3 | VERIFY CURRENT SIGNAL STATUS: IS CONCERN INTERMITTENT OR CONSTANT? • Connect the WDS or equivalent to the DLC-2. • Clear the DTC from the PCM memory using the WDS or equivalent. • Start the engine. • Is the PENDING CODE for this DTC present? | Yes | Go to the next step.
No | Intermittent concern exists. Perform the "INTERMITTENT CONCERN TROUBLESHOOTING". (See INTERMITTENT CONCERN TROUBLESHOOTING [MZR-CD (RF Turbo)].)
4 | INSPECT VBC SOLENOID VALVE CONNECTOR FOR POOR CONNECTION • Turn the engine switch off. • Disconnect the VBC solenoid valve connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction? | Yes | Repair or replace the terminal, then go to Step 10.
No | Go to the next step.
5 | INSPECT VBC SOLENOID VALVE POWER CIRCUIT FOR OPEN CIRCUIT • Turn the engine switch to the ON position (Engine off). • Measure the voltage between VBC solenoid valve terminal A (wiring harness-side) and body GND. • Is the voltage B+? | Yes | Go to the next step.
No | Repair or replace the wiring harness for a possible open circuit or short to GND, then go to Step 10.
6 | INSPECT VBC SOLENOID VALVE CONTROL CIRCUIT FOR SHORT TO GND • Turn the engine switch off. • Inspect for continuity between VBC solenoid valve terminal B (wiring harness-side) and body GND. • Is there continuity? | Yes | Repair or replace the wiring harness for a possible short to GND, then go to Step 10.
No | Go to the next step.
7 | INSPECT VBC SOLENOID VALVE • Inspect the VBC solenoid valve. (See VARIABLE BOOST CONTROL (VBC) SOLENOID VALVE INSPECTION [MZR-CD (RF Turbo)].) • Is there any malfunction? | Yes | Replace the VBC solenoid valve, then go to Step 10.
No | Go to the next step.
8 | INSPECT PCM CONNECTOR FOR POOR CONNECTION • Turn the engine switch off. • Disconnect the PCM connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction? | Yes | Repair or replace the terminal, then go to Step 10.
No | Go to the next step.
9 | INSPECT VBC SOLENOID VALVE CONTROL CIRCUIT FOR OPEN CIRCUIT • Turn the engine switch off. • Inspect for continuity between VBC solenoid valve terminal B (wiring harness-side) and PCM terminal 67 (wiring harness-side). • Is there continuity? | Yes | Go to the next step.
No | Repair or replace the wiring harness for a possible open circuit, then go to the next step.
10 | VERIFY TROUBLESHOOTING OF DTC P0045 COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the WDS or equivalent. • Start the engine. • Is the PENDING CODE for this DTC present? | Yes | Replace the PCM, then go to the next step.
No | Go to the next step.
11 | VERIFY AFTER REPAIR PROCEDURE • Perform the Repair Verification Drive Mode. (See OBD DRIVE MODE [MZR-CD (RF Turbo)].) • Is any DTCs present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [MZR-CD (RF Turbo)].)
No | DTC troubleshooting completed.