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

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.
1		No	Record the FREEZE FRAME DATA 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 the 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 ELECTRONIC THROTTLE CONTROL SYSTEM OPERATION • Perform the TP sweep inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION[L3 Turbo].) • Does the electronic throttle control system work properly?	Yes	Go to the next step.
3		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. (See ENGINE SYMPTOM TROUBLESHOOTING[L3 Turbo].)
4		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.
5		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.
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 the engine compression. (See COMPRESSION INSPECTION[L3 Turbo].) • Is the 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 COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC using the M-MDS. • Perform the KOER Self-Test. • Is the same DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION[L3 Turbo].)
9		No	Go to the next step.
10	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE[L3 Turbo].) • Are any DTCs present?	Yes	Go to the applicable DTC troubleshooting. (See DTC TABLE[L3 Turbo].)
10		No	Troubleshooting completed.