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 DTC P0628 [MZR-CD (RF Turbo)]

DTC P0628 [MZR-CD (RF Turbo)]

id0102f1955200

DTC P0628

Suction control valve circuit low input

DETECTION CONDITION

• The PCM monitors the suction control valve circuit current while the engine is running. If the PCM detects the circuit current is less than 0.5 A when the suction control valve is on, the PCM determines that there is a malfunction in the suction control valve 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 to ground in wiring harness between suction control valve terminal A and PCM terminal 10
• Short to ground in wiring harness between suction control valve terminal B and PCM terminal 29
• Open circuit in wiring harness between suction control valve terminal A and PCM terminal 10
• Open circuit in wiring harness between suction control valve terminal B and PCM terminal 29
• 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 Information availability.
• Is any related repair information available?
Yes
Perform repair or diagnosis according to the available Service 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
INSPECT POOR CONNECTION OF SUCTION CONTROL VALVE CONNECTOR
• 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, go to Step 9.
No
Go to the next step.
5
INSPECT SUCTION CONTROL VALVE CIRCUIT FOR A SHORT TO GROUND
• Turn the engine switch off.
• Inspect for continuity between the following terminals and body ground:
- Suction control valve terminal A and body ground.
- Suction control valve terminal B and body ground.
• Is there continuity?
Yes
Repair or replace the wiring harness for a short to ground, go to Step 9.
No
Go to the next step.
6
INSPECT SUCTION CONTROL VALVE
• Inspect the suction control valve.
•  Is there any malfunction?
Yes
Repair the supply pump, go to Step 9.
No
Go to the next step.
7
INSPECT PCM 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, go to Step 9.
No
Go to the next step.
8
INSPECT SUCTION CONTROL VALVE CIRCUIT FOR OPEN CIRCUIT
• Turn the engine switch off.
• Inspect for continuity between the following terminals:
- Suction control valve terminal A and PCM terminal 10.
- Suction control valve terminal B and PCM terminal 29.
• Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness for an open circuit, go to the next step.
9
VERIFY TROUBLESHOOTING OF DTC P0628 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 same DTC present?
Yes
Replace the PCM, 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 inspection.
No
Troubleshooting completed.