Mazda Mazda6 Workshop Manual Supplement page 243

STEP
2 INSPECT POOR CONNECTION OF SUCTION
CONTROL VALVE CONNECTOR
• Turn engine switch to OFF.
• Inspect for poor connection (damaged, pulled-
out terminals, corrosion, etc.).
• Is there any malfunction?
3 INSPECT SUCTION CONTROL VALVE CIRCUIT
FOR SHORT TO GND
• Turn engine switch to OFF.
• Inspect continuity between following
harnesses:
— Suction control valve terminal A and body
GND.
— Suction control valve terminal B and body
GND.
• Is there continuity?
4 INSPECT SUCTION CONTROL VALVE
• Inspect suction control valve.
(See F2–54 SUCTION CONTROL VALVE
INSPECTION)
•
Is there any malfunction?
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?
6 INSPECT SUCTION CONTROL VALVE CIRCUIT
FOR OPEN
• Turn engine switch to OFF.
• Inspect continuity between following
harnesses:
— Suction control valve terminal A and PCM
terminal 93.
— Suction control valve terminal B and PCM
terminal 94.
• Is there continuity?
7 VERIFY TROUBLESHOOTING OF DTC P0091
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear DTC from PCM memory using WDS or
equivalent.
• Start engine.
• Is same DTC present?
8 VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
(See F2–86 AFTER REPAIR
• Is there any DTC present?
End Of Sie
ON-BOARD DIAGNOSTIC
INSPECTION
PROCEDURE)
Yes Repair or replace suspected terminal, go to Step 7.
No Go to next step.
Yes Repair or replace harness for short to GND, go to Step 7.
No Go to next step.
Yes Repair supply pump, go to Step 7.
(See F2–54 SUPPLY PUMP
No Go to next step.
Yes Repair or replace suspected terminal, go to Step 7.
No Go to next step.
Yes Go to next step.
No Repair or replace harness for open, go to next step.
Yes Replace PCM, go to next step.
(See F2–64 PCM REMOVAL/INSTALLATION)
No Go to next step.
Yes Go to applicable DTC inspection.
(See F2–87 DTC TABLE)
No Troubleshooting completed.
ACTION
INSPECTION)
F2–91
F2