Dtc P0505 - Mazda 2002 6 Workshop Manual

STEP
11 VERIFY TROUBLESHOOTING OF DTC P0500
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Turn ignition key to ON (Engine OFF).
• Clear DTC from PCM memory using WDS or
equivalent.
• Warm up engine.
• Access RPM and LOAD PID using WDS or
equivalent.
• Drive vehicle under following conditions for
18s.
— Engine speed: 2,000 rpm or above
— Gear: Gear is in other than NEUTRAL
— Load: 40% or above
• Is PENDING CODE the same as DTC
present?
12 VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
(See F–66 AFTER REPAIR
• Is there any DTC present?
End Of Sie

DTC P0505

DTC P0505 IAC valve circuit malfunction
DETECTION
• PCM cannot control idle speed toward target idle speed while KOER self test.
CONDITION
• IAC valve circuit malfunction
• Air cleaner element clogged
• Air intake passage clogged
POSSIBLE
• A/C relay control circuit malfunction
CAUSE
• Generator control circuit malfunction
• Low engine compression (Over capacity of blow-by gas)
• PCM malfunction
Diagnostic procedure
STEP
1 VERIFY RELATED SERVICE INFORMATION
AVAILABILITY
• Check for related Service Information
availability.
• Is any related Service Information available?
2 VERIFY RELATED PENDING OR STORED
DTCS
• Turn ignition switch to OFF, then ON. (Engine
OFF)
• verify pending code or stored DTCs using
WDS or equivalent.
• Does DTC P0511,P2502, P2503 or P2504
present?
3 INSPECT IAC VALVE MALFUNCTION
• Start engine.
• Disconnect IAC valve connector.
• Is engine speed decreased?.
4 INSPECT A/C MAGNETIC CLUTCH
OPERATION
Note
• The following test should be performed for
A/C.go to next step for vehicles without A/C
• Turn blower motor switch to off.
• Is magnetic clutch still on?
F–144
ON-BOARD DIAGNOSTIC
INSPECTION
PROCEDURE.)
INSPECTION
Yes Replace PCM, then go to next step.
(See F–43 PCM REMOVAL/INSTALLATION.)
No Go to next step.
Yes Go to applicable DTC troubleshooting.
(See F–67 DTC TABLE.)
No Troubleshooting completed.
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 Perform applicable DTC troubleshooting.
(See F–67 DTC TABLE.)
No Go to next step.
Yes Go to next step.
No Repair IAC valve, then go to Step 9.
Yes Go to "A/C ALWAYS ON / A/C COMPRESSOR RUNS
CONTINUOUSLY." of ENGINE SYMPTOM
TROUBLESHOOTING then go to step 9.
(See F–181 ENGINE SYMPTOM
No Go to next step.
ACTION
A6E397001087W02
ACTION
TROUBLESHOOTING.)