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 DTC P0505 [L3 Turbo]

DTC P0505 [L3 Turbo]

id0102b7808500

DTC P0505

IAC system problem

DETECTION CONDITION

• The PCM cannot control idle speed toward the target idle speed during the KOER self test.

POSSIBLE CAUSE

• Air cleaner element clogged
• Air intake passage clogged
• A/C relay control circuit malfunction
• Generator control circuit malfunction
• Low engine compression (Over capacity of blow-by gas)
• Electronic throttle control system improper operation
• PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
VERIFY FREEZE FRAME DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAS BEEN RECORDED
• Has FREEZE FRAME DATA been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2
VERIFY RELATED REPAIR 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.
3
VERIFY ELECTRONIC THROTTLE CONTROL SYSTEM OPERATION
• Perform the TP sweep inspection.
• Does the electronic throttle control system work properly?
Yes
Go to the next step.
No
Repair or replace the malfunctioning part according to the inspection result.
Then go to Step 9.
4
INSPECT A/C MAGNETIC CLUTCH OPERATION
Note
• The following test should be performed for vehicles with A/C. Go to the next step for vehicles without A/C
• Turn the fan switch off.
• Is the magnetic clutch still on?
Yes
Go to "A/C ALWAYS ON / A/C COMPRESSOR RUNS CONTINUOUSLY." of ENGINE SYMPTOM TROUBLESHOOTING then go to Step 9.
No
Go to the next step.
5
INSPECT GENERATOR CONTROL CIRCUIT MALFUNCTION
• Apply electrical load.
• Does the engine speed increase?
Yes
Go to the next step.
No
Repair for a short to the power supply in the generator control circuit, then go to Step 9.
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.
No
Go to the next step.
7
INSPECT 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.
8
INSPECT ENGINE COMPRESSION
• Inspect the engine compression.
• Is the engine compression normal?
Yes
Go to the next step.
No
Overhaul the engine, then go to the next step.
9
VERIFY TROUBLESHOOTING OF DTC P0505 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC using the WDS or equivalent.
• Perform the KOER Self-Test.
• Is the same DTC present?
Yes
Replace the PCM, then go to the next step.
No
Go to the next step.
10
VERIFY AFTER REPAIR PROCEDURE
• Perform the "AFTER REPAIR PROCEDURE".
• Are any DTCs present?
Yes
Go to the applicable DTC troubleshooting.
No
Troubleshooting completed.