Mazda 6 2002 - Dtc P0511

F148
ON-BOARD DIAGNOSTIC
End Of Sie
DTC P0511
A6E397001087W05
9 VERIFY TROUBLESHOOTING OF DTC P0507
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Start engine.
• Clear DTC from PCM memory using WDS or
equivalent.
• Depress brake pedal for 14 s or more.
• Is PENDING CODE the same as DTC
present?
Yes Replace PCM, then go to next step.
(See F43 PCM REMOVAL/INSTALLATION.)
No Go to next step.
10 VERIFY AFTER REPAIR PROCEDURE
• Perform After Repair Procedure.
(See F66 AFTER REPAIR PROCEDURE.)
• Is there any DTC present?
Yes Go to applicable DTC troubleshooting.
(See F67 DTC TABLE.)
No Troubleshooting completed.
STEP INSPECTION ACTION
DTC P0511 IAC valve circuit malfunction
DETECTION
CONDITION
• If PCM detects that PCM terminal 4G voltage is above or below threshold
*
when IAC control duty target is
within 1670%, PCM determines that IAC valve circuit has malfunction.
*: Detected threshold value depends on battery voltage and IAC control signal duty value.
Diagnostic support note
• This is a continuous monitor (CCM).
• MIL illuminates if PCM detects the above malfunction conditions in first consecutive drive cycles.
• PENDING CODE is available if PCM detects the above malfunction condition.
• FREEZE FRAME DATA is available.
• DTC is stored in PCM memory.
POSSIBLE
CAUSE
• IAC valve circuit malfunction
• Short to ground between IAC valve terminal A (harness-side) and PCM terminal 4G (harness-side)
• Short to ground between IAC valve terminal B (harness-side) and PCM terminal 4J (harness-side)
• Open circuit between IAC valve terminal A (harness-side) and PCM terminal 4G (harness-side)
• Open circuit between IAC valve terminal B (harness-side) and PCM terminal 4J (harness-side)
• Short to power between IAC valve terminal A (harness-side) and PCM terminal 4G (harness-side)
• Short to power between IAC valve terminal B (harness-side) and PCM terminal 4J (harness-side)
• Poor connection of IAC valve connector or PCM connector
• PCM malfunction