id0102b7704900
| DTC P0505:00 |
IAC system malfunction |
|---|---|
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DETECTION CONDITION
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• The PCM cannot control idle speed toward the target idle speed during the KOER self test.
Diagnostic support note
• The MIL does not illuminate.
• FREEZE FRAME DATA (Mode 2)/Snapshot data is not available.
• DTCs are not stored in the PCM memory.
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POSSIBLE CAUSE
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• Improper operation of electronic throttle control system
• A/C relay control circuit malfunction
• Generator control circuit malfunction
• Air cleaner element clogged
• Air intake passage clogged
• Low engine compression (Over capacity of blow-by gas)
• PCM malfunction
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Diagnostic procedure
| STEP |
INSPECTION |
ACTION |
|
|---|---|---|---|
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1
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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.
|
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No
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Go to the next step.
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2
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VERIFY RELATED PENDING CODE AND STORED DTC
• Turn the ignition switch off, then to the ON position (engine off).
• Perform the DTC Reading Procedure and Pending Trouble Code Access Procedure. (See
ON-BOARD DIAGNOSTIC TEST [L3 Turbo].)
• Are the DTCs P0506:00, P0507:00, P0638:00, P2100:00, P2101:00, P2108:00, or P2119:00 present?
|
Yes
|
Go to the applicable DTC inspection.
(See
DTC P0506:00 [L3 Turbo].)
(See
DTC P0507:00 [L3 Turbo].)
(See
DTC P0638:00 [L3 Turbo].)
(See
DTC P2100:00 [L3 Turbo].)
(See
DTC P2101:00 [L3 Turbo].)
(See
DTC P2108:00 [L3 Turbo].)
(See
DTC P2119:00 [L3 Turbo].)
|
|
No
|
Go to the next step.
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3
|
VERIFY ELECTRONIC THROTTLE CONTROL SYSTEM OPERATION
• Perform the throttle position (TP) sweep inspection. (See
ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 Turbo].)
• Does the electronic throttle control system work properly?
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Yes
|
Go to the next step.
|
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No
|
Repair or replace the malfunctioning part according to the inspection results, then go to Step 9.
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4
|
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”.
|
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No
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Go to the next step.
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5
|
INSPECT GENERATOR CONTROL CIRCUIT MALFUNCTION
• Apply the electrical load.
• Does the engine speed increase?
|
Yes
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Go to the next step.
|
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No
|
Repair the generator control circuit for short to power supply, then go to Step 9.
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6
|
INSPECT AIR CLEANER ELEMENT
• Remove the air cleaner element with the engine running.
• Does the engine speed increase?
|
Yes
|
Clean or replace the air cleaner element, then go to Step 9.
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No
|
Go to the next step.
|
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7
|
INSPECT THROTTLE BODY PASSAGE
• Visually inspect the throttle body passage.
• Is the throttle body clogged?
|
Yes
|
Clean or replace the throttle body passage, then go to Step 9.
|
|
No
|
Go to the next step.
|
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|
8
|
INSPECT ENGINE COMPRESSION
• Inspect the engine compression. (See
COMPRESSION INSPECTION [L3 Turbo].)
• Is there any malfunction?
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Yes
|
Repair or replace the malfunctioning part according to the inspection results, then go to the next step.
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No
|
Go to the next step.
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9
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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 [L3 Turbo].)
• Perform the KOER self test. (See
KOEO/KOER SELF TEST [L3 Turbo].)
• Is the same DTC present?
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Yes
|
Replace the PCM, then go to the next step.
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No
|
Go to the next step.
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10
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VERIFY AFTER REPAIR PROCEDURE
• Perform the “AFTER REPAIR PROCEDURE”. (See
AFTER REPAIR PROCEDURE [L3 Turbo].)
• Are any DTCs present?
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Yes
|
Go to the applicable DTC inspection.
(See
DTC TABLE [L3 Turbo].)
|
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No
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DTC troubleshooting completed.
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