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DTC P0661 [MZR-CD (RF Turbo)]

BME010200600W04

DTC P0661 | VSC solenoid valve circuit low input
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DETECTION CONDITION | • PCM monitors input voltage from VSC solenoid valve while engine is running. If input voltage from VSC solenoid valve is below 0.1 V, PCM determines suction control valve circuit low input.
POSSIBLE CAUSE | • VSC solenoid valve malfunction • Connector or terminal malfunction • Short to GND in wiring between VSC solenoid valve terminal A and PCM control relay terminal C • Short to GND in wiring between VSC solenoid valve terminal B and PCM terminal 101
• Open circuit in wiring between VSC solenoid valve terminal PCM control relay terminal C
• Open circuit in wiring between VSC solenoid valve terminal B and PCM terminal 101
• PCM malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | PERFORM DTC CONFIRMATION PROCEDURE • Perform "DTC Confirmation Procedure". (See DTC CONFIRMATION PROCEDURE [MZR-CD (RF Turbo)].) • Is same DTC present during KOEO or KOER self-test? | Yes | Go to next step.
No | Intermittent concern exists. Go to "Intermittent Concern Troubleshooting". (See INTERMITTENT CONCERN TROUBLESHOOTING [MZR-CD (RF Turbo)])
2 | INSPECT POOR CONNECTION OF VSC SOLENOID VALVE CONNECTOR • Turn engine switch to OFF. • Inspect for poor connection (damaged, pulled-out terminals, corrosion, etc.). • Is there any malfunction? | Yes | Repair or replace suspected terminal, go to Step 7.
No | Go to next step.
3 | INSPECT VSC SOLENOID VALVE CIRCUIT FOR SHORT TO GND • Turn engine switch to OFF. • Inspect continuity between following harnesses:

  - VSC solenoid valve terminal A and PCM control relay terminal C.
  - VSC solenoid valve terminal B and PCM terminal 101.

• Is there continuity?
Yes
Repair or replace harness for short to GND, go to Step 7.
No | Go to next step.
4 | INSPECT VSC SOLENOID VALVE • Inspect VSC solenoid valve. (See VARIABLE SWIRL CONTROL (VSC) SOLENOID VALVE INSPECTION [MZR-CD (RF Turbo)].) • Is there any malfunction? | Yes | Replace VSC solenoid valve, go to Step 7.
No | Go to next step.
5 | INSPECT POOR CONNECTION OF PCM CONNECTOR • Turn engine switch to OFF. • Inspect for poor connection (damaged, pulled-out terminals, corrosion, etc.). • Is there any malfunction? | Yes | Repair or replace suspected terminal, go to Step 7.
No | Go to next step.
6 | INSPECT VSC SOLENOID VALVE CIRCUIT FOR OPEN • Turn engine switch to OFF. • Inspect continuity between following harnesses:

  - VSC solenoid valve terminal A and PCM control relay terminal C.
  - VSC solenoid valve terminal B and PCM terminal 101.

• Is there continuity?
Yes
Go to next step.
No | Repair or replace harness for open, go to next step.
7 | VERIFY TROUBLESHOOTING OF DTC P0661 COMPLETED • Make sure to reconnect all disconnected connectors. • Clear DTC from PCM memory using WDS or equivalent. • Start engine. • Is same DTC present? | Yes | Replace PCM, go to next step. (See PCM REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].)
No | Go to next step.
8 | VERIFY AFTER REPAIR PROCEDURE • Perform "After Repair Procedure". (See AFTER REPAIR PROCEDURE [MZR-CD (RF Turbo)].) • Is there any DTC present? | Yes | Go to applicable DTC inspection. (See DTC TABLE [MZR-CD (RF Turbo)].)
No | Troubleshooting completed.