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DTC P0505 [AJ] (VIN: JM0 LW10J300 301406-, JMZ LW69J7*# 307683-, JM8 LW28J**# 301514-, JM8 LW28A**# 301514- (Assumed))

BME010200500W02

DTC P0505 | Idle control system malfunction
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DETECTION CONDITION | • The PCM cannot control the idle speed toward the target idle speed while 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
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1 | VERIFY RELATED REPAIR INFORMATION AVAILABILITY • Check for related Service Information and/or on-line repair information availability. • Is any related repair information available? | Yes | Perform repair or diagnosis according to available repair Information. • If vehicle is not repaired, go to next step.
No | Go to next step.
2 | VERIFY RELATED PENDING OR STORED DTCs • Turn the ignition switch to OFF, then ON. (Engine OFF) • Verify pending code or stored DTCs using WDS or equivalent. • Does DTC P0506 or P0507 present? | Yes | Perform applicable DTC inspection. (See DTC TABLE [AJ] (VIN: JM0 LW10J300 301406-, JMZ LW69J7*# 307683-, JM8 LW28J**# 301514-, JM8 LW28A**# 301514- (Assumed)).)
No | Go to 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. (See IDLE AIR CONTROL (IAC) VALVE INSPECTION [AJ] (VIN: JMZ LW19J7*# 300001-, JM0 LW10J300 300001-301405, JM6 LW10J300 300001-, JM8 LW28J**# 300001-301513).) (See IDLE AIR CONTROL (IAC) VALVE INSPECTION [AJ] (VIN: JM0 LW10J300 301406-, JMZ LW69J7*# 307683-, JM8 LW28J**# 301514-, JM8 LW28A**# 301514- (Assumed)).)
4 | INSPECT A/C MAGNETIC CLUTCH OPERATION

  Note

  • The following test should be performed for A/C. Go to the next step for vehicles without A/C.

• Turn the A/C switch off.
• Is 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.
(See SYMPTOM DIAGNOSTIC INDEX [AJ].)
No | Go to the next step.
5 | INSPECT GENERATOR CONTROL CIRCUIT MALFUNCTION • Apply electrical load. • Is engine speed increased? | 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. • Is the engine speed increased? | 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 throttle body clogged? | Yes | Clean the throttle body passage or replace the throttle body, then go to Step 9.
No | Go to the next step.
8 | INSPECT ENGINE COMPRESSION • Inspect engine compression. (See COMPRESSION INSPECTION [AJ].) • Is engine compression normal? | Yes | Go to the next step.
No | Overhaul engine, then go to the 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. • Is same DTC present? | Yes | Replace PCM, then go to next step. (See PCM REMOVAL/INSTALLATION [AJ].)
No | Go to next step.
10 | VERIFY AFTER REPAIR PROCEDURE • Perform "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE [AJ].) • Are any DTCs present? | Yes | Go to applicable DTC inspection. (See DTC TABLE [AJ] (VIN: JM0 LW10J300 301406-, JMZ LW69J7*# 307683-, JM8 LW28J**# 301514-, JM8 LW28A**# 301514- (Assumed)).)
No | Troubleshooting completed.