DTC P0505 [L3 R.H.D.]

id0102a2808500

DTC P0505

IAC system problem

DETECTION CONDITION

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

POSSIBLE CAUSE

• IAC valve circuit malfunction
• 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)
• PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
VERIFY RELATED REPAIR INFORMATION AVAILABILITY
• Verify related service repair information availability.
• Is any related repair information available?
Yes
Perform repair or diagnosis according to the available repair information.
• If the vehicle is not repaired, go to the next step.
No
Go to the next step.
2
VERIFY RELATED PENDING OR STORED DTC
• Turn the ignition switch off then to the ON position (engine off).
• Verify the pending code or stored DTCs using the WDS or equivalent.
• Is DTC P0511, P2502, P2503, or P2504 present?
Yes
Perform the applicable DTC troubleshooting.
No
Go to the next step.
3
INSPECT IAC VALVE MALFUNCTION
• Start engine.
• Disconnect IAC valve connector.
• Is engine speed decreased?.
Yes
Go to the next step.
No
Repair the IAC valve, then go to Step 9.
4
INSPECT A/C MAGNETIC CLUTCH OPERATION
Note
• The following test should be performed for the 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 short to power supply in 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 from memory using the WDS or equivalent.
• Perform KOER self test.
• Is the PENDING CODE for this 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.