Mazda Mazda6 Workshop Manual Supplement page 303

Diagnostic procedure
STEP
1 VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
• Check for related Service Information
availability.
• Is any related repair information available?
2 INSPECT POOR CONNECTION OF ENGINE
SWITCH CONNECTOR
• Turn engine switch to OFF.
• Inspect for poor connection (damaged, pulled-
out terminals, corrosion, etc.).
• Is there any malfunction?
3 INSPECT ENGINE SWITCH SIGNAL CIRCUIT
FOR SHORT TO POWER
• Turn engine switch to ON (Engine OFF).
• Inspect voltage between engine switch terminal
A and body GND.
• Is voltage below 1.0 V?
4 INSPECT ENGINE SWITCH
• Inspect engine switch.
• 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 VERIFY TROUBLESHOOTING OF DTC P0512
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear DTC from PCM memory using WDS or
equivalent.
• Start engine.
• Is same DTC present?
7 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 Perform repair or diagnosis according to available Service
Information.
• If vehicle is not repaired, go to next step.
No Go to next step.
Yes Repair or replace suspected terminal, go to Step 6.
No Go to next step.
Yes Go to next step.
No Repair or replace harness for short to power, go to Step 6.
Yes Replace engine switch, go to Step 6.
No Go to next step.
Yes Repair or replace suspected terminal, go to next step.
No 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
F2–151
F2