DTC P0627 [MZR-CD (RF Turbo)]

BME010200102280

DTC P0627

Suction control valve circuit open

DETECTION CONDITION

• The PCM monitors the suction control valve operation circuit signal frequency at PCM terminal 94. If the difference between the suction control valve operation frequency at PCM terminal 93 and the monitored suction control valve operation circuit signal frequency at PCM terminal 94 exceeds the threshold, the PCM determines that suction control valve open circuit.
Diagnostic support note
• The MIL illuminates if the PCM detects the above malfunction condition in the first drive cycle.
• FREEZE FRAME DATA is available.
• The DTC is stored in the PCM memory.

POSSIBLE CAUSE

• Suction control valve malfunction
• Connector or terminal malfunction
• Short circuit in wiring harness between suction control valve terminal A and B
• PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

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 Bulletins and/or on-line 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 same DTC present?
Yes
Go to the next step.
No
Intermittent concern exists.
Perform the "INTERMITTENT CONCERN TROUBLESHOOTING".
4
IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA
• Is DTC P0627 on the FREEZE FRAME DATA?
Yes
Go to the next step.
No
Go to the troubleshooting procedures for the DTC in the FREEZE FRAME DATA.
5
INSPECT SUCTION CONTROL VALVE CONNECTOR FOR POOR CONNECTION
• Turn the engine switch off.
• Inspect for poor connection (such as damaged/pulled-out terminals, corrosion).
• Is there any malfunction?
Yes
Repair or replace the suspected terminal, then go to Step 9.
No
Go to the next step.
6
INSPECT SUCTION CONTROL VALVE
• Inspect the suction control valve.
• Is the suction control valve normal?
Yes
Go to the next step.
No
Replace the supply pump, then go to Step 9.
7
INSPECT SUCTION CONTROL VALVE FOR SHORT CIRCUIT
• Turn the engine switch off.
• Disconnect the PCM and the suction control valve connectors.
• Inspect for continuity between suction control valve terminal A and B while slightly shaking each connectors and harnesses between the suction control valve and the PCM (including short wiring harness).
• Is there continuity?
Yes
Repair or replace for a short, then go to Step 9.
No
Go to the next step.
8
INSPECT PCM CONNECTOR FOR POOR CONNECTION
• Turn the engine switch to off.
• Inspect for poor connection (such as damaged/pulled-out terminals, corrosion).
• Is there any malfunction?
Yes
Repair or replace the suspected terminal, then go to the next step.
No
Go to the next step.
9
VERIFY TROUBLESHOOTING OF MISFIRE DTC COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC using the WDS or equivalent.
• Start the engine.
• Is the same DTC present?
Yes
Replace the PCM, then go to the next step.
No
Go to the next step.
10
VERIFY AFTER REPAIR PROCEDURE
• Perform the Repair Verification Drive Mode.
• Are any DTCs present?
Yes
Go to the applicable DTC troubleshooting.
No
Troubleshooting completed.