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 M-MDS to the DLC-2.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Start the engine.
•  Is the same 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 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.
(See SUPPLY PUMP REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].)
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 M-MDS.
•  Start the engine.
•  Is the same DTC present?
Yes
Replace the PCM, go to the next step.
(See PCM REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].)
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.
(See DTC TABLE [MZR-CD (RF Turbo)].)
No
Troubleshooting completed.