#
DTC P0505 [L3]

BME010200500W02

DTC P0505 | IAC valve circuit malfunction
--- | ---
DETECTION CONDITION | • PCM cannot control idle speed toward target idle speed during 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 SERVICE INFORMATION AVAILABILITY • Check for related Service Information availability. • Is any related Service Information available? | Yes | Perform repair or diagnosis according to available Service Information. • If vehicle is not repaired, go to next step.
No | Go to next step.
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. • Is DTC P0511,P2502, P2503 or P2504 present? | Yes | Perform applicable DTC troubleshooting. (See DTC P0511 [L3].) (See DTC P2502 [L3].) (See DTC P2503 [L3].) (See DTC P2504 [L3].)
No | Go to next step.
3 | INSPECT IAC VALVE MALFUNCTION • Start engine. • Disconnect IAC valve connector. • Is engine speed decreased?. | Yes | Go to next step.
No | Repair IAC valve, then go to Step 9.
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?
Yes
Go to "A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY." of ENGINE SYMPTOM TROUBLESHOOTING then go to step 9.
(See NO.24 A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY [L3].)
No | Go to next step.
5 | INSPECT GENERATOR CONTROL CIRCUIT MALFUNCTION • Apply electrical load. • Does engine speed increase? | Yes | Go to next step.
No | Repair short to power circuit in generator control circuit, then go to Step 9.
6 | INSPECT AIR CLEANER ELEMENT • Remove air cleaner element with engine running. • Does engine speed increase? | Yes | Clean or replace throttle body passage, then go to Step 9.
No | Go to next step.
7 | INSPECT THROTTLE BODY PASSAGE • Is throttle body clogged? | Yes | Clean or replace throttle body passage, then go to Step 9.
No | Go to next step.
8 | INSPECT ENGINE COMPRESSION • Inspect engine compression. (See COMPRESSION INSPECTION [L3].) • Is compression okay? | Yes | Go to next step.
No | Overhaul engine, then go to next step.
9 | VERIFY TROUBLESHOOTING OF DTC P0505 COMPLETED • Make sure to reconnect all disconnected connectors. • Clear DTC using WDS or equivalent. • Perform KOER self-test. (See KOEO/KOER SELF-TEST PROCEDURE [L3].)
• Is same DTC present?
Yes
Replace PCM, then go to next step.
(See PCM REMOVAL/INSTALLATION [L3].)
No | Go to next step.
10 | VERIFY AFTER REPAIR PROCEDURE • Perform "After Repair Procedure". (See AFTER REPAIR PROCEDURE [L3].) • Is there any DTC present? | Yes | Go to applicable DTC troubleshooting. (See DTC TABLE [L3].)
No | Troubleshooting completed.