DTC P0505:00 [L8, LF, L5]

id010242704900

DTC P0505:00

IAC system problem

DETECTION CONDITION

•  The PCM cannot control idle speed toward target idle speed while 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)

•  Drive-by-wire control system improper operation

•  PCM malfunction

DTC P0505:00	IAC system problem
DETECTION CONDITION	• The PCM cannot control idle speed toward target idle speed while 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) • Drive-by-wire 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.
1		No	Record the FREEZE FRAME on the repair order, then go to the next step.
2	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.
2		No	Go to the next step.
3	VERIFY DRIVE-BY-WIRE CONTROL SYSTEM OPERATION • Perform the TP sweep inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L8, LF, L5].) • Does the drive-by-wire control system work properly?	Yes	Go to the next step.
3		No	Repair or replace malfunctioning part according to inspection result. 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. (See SYMPTOM DIAGNOSTIC INDEX [L8, LF, L5].)
4		No	Go to the next step.
5	INSPECT GENERATOR CONTROL CIRCUIT MALFUNCTION • Apply electrical load. • Is the engine speed increased?	Yes	Go to the next step.
5		No	Repair short to power supply in generator control circuit, then go to Step 9.
6	INSPECT AIR CLEANER ELEMENT • Remove 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.
6		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.
7		No	Go to the next step.
8	INSPECT ENGINE COMPRESSION • Inspect engine compression. (See COMPRESSION INSPECTION [L8, LF, L5].) • Is engine compression normal?	Yes	Go to the next step.
8		No	Overhaul the engine, then go to the next step.
9	VERIFY TROUBLESHOOTING OF DTC P0505:00 COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC using the M-MDS. • Perform the KOER Self-Test. • Is the DTC P0505:00 present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [L8, LF, L5].)
9		No	Go to the next step.
10	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [L8, LF, L5].) • Are any DTC present?	Yes	Go to the applicable DTC troubleshooting. (See DTC TABLE [L8, LF, L5].)
10		No	Troubleshooting completed.