id0102c9704900
| DTC P0505:00 |
IAC system problem |
|---|---|
|
DETECTION CONDITION
|
• The PCM cannot control idle speed toward target idle speed while KOER self test.
Diagnostic support note
• The MIL does not illuminate.
• FREEZE FRAME DATA (Mode 2)/Snapshot data is not available.
• The DTC is not stored in the PCM memory.
|
|
POSSIBLE CAUSE
|
• A/C magnetic clutch malfunction
• Generator control circuit malfunction
• Air cleaner element clogged
• Throttle body passage clogged
• Insufficient engine compression (over capacity of blow-by gas)
• PCM malfunction
|
Diagnostic procedure
| STEP |
INSPECTION |
ACTION |
|
|---|---|---|---|
|
1
|
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
• Verify related Service Information availability.
• Is any related Service 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.
|
||
|
2
|
VERIFY RELATED PENDING CODE AND/OR DTC
• Turn the ignition switch off, then to the ON position (engine off).
• Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure. (See
ON-BOARD DIAGNOSTIC TEST [L5].)
• Are any other PENDING CODEs and/or DTCs present?
|
Yes
|
Go to the applicable PENDING CODE or DTC inspection.
(See
DTC TABLE [L5].)
|
|
No
|
Go to the next step.
|
||
|
3
|
INSPECT A/C MAGNETIC CLUTCH OPERATION
• Turn the fan switch off.
• Is the magnetic clutch still on?
|
Yes
|
Perform the symptom troubleshooting “NO.24 A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY”.
|
|
No
|
Go to the next step.
|
||
|
4
|
INSPECT GENERATOR CONTROL CIRCUIT MALFUNCTION
• Apply the electrical load.
• Is the engine speed increased?
|
Yes
|
Go to the next step.
|
|
No
|
Repair the generator control circuit for short to power supply, then go to Step 8.
|
||
|
5
|
INSPECT AIR CLEANER ELEMENT
• Remove the air cleaner element with the engine running. (See
INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [L5].)
• Is the engine speed increased?
|
Yes
|
Clean or replace the air cleaner element, then go to Step 8.
|
|
No
|
Go to the next step.
|
||
|
6
|
INSPECT THROTTLE BODY PASSAGE
• Turn the ignition switch off.
• Visually inspect the throttle body passage.
• Is the throttle body passage clogged?
|
Yes
|
Clean or replace the throttle body passage, then go to Step 8.
|
|
No
|
Go to the next step.
|
||
|
7
|
INSPECT ENGINE COMPRESSION
• Inspect the engine compression. (See
COMPRESSION INSPECTION [L5].)
• Is there any malfunction?
|
Yes
|
Repair or replace the malfunctioning part according to the inspection results, then go to the next step.
|
|
No
|
Go to the next step.
|
||
|
8
|
VERIFY DTC TROUBLESHOOTING COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the M-MDS. (See
AFTER REPAIR PROCEDURE [L5].)
• Perform the KOER self test. (See
KOEO/KOER SELF TEST [L5].)
• Is the same DTC present?
|
Yes
|
Replace the PCM, then go to the next step.
|
|
No
|
Go to the next step.
|
||
|
9
|
VERIFY AFTER REPAIR PROCEDURE
• Perform the “AFTER REPAIR PROCEDURE”. (See
AFTER REPAIR PROCEDURE [L5].)
• Are any DTCs present?
|
Yes
|
Go to the applicable DTC inspection.
(See
DTC TABLE [L5].)
|
|
No
|
DTC troubleshooting completed.
|
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