DTC P0505[ZJ, ZY, Z6]

id0102c1808500

Without Throttle Valve Actuator

DTC P0505

IAC system problem

DETECTION CONDITION

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

DTC P0505	IAC system problem
DETECTION CONDITION	• The PCM cannot control idle speed toward target idle speed while 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 • 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.
1		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 pending code or stored DTCs using the M-MDS. • Does DTC P0511,P2502, P2503 or P2504 present?	Yes	Perform the applicable DTC troubleshooting. (See DTC TABLE[ZJ, ZY, Z6].)
2		No	Go to the next step.
3	INSPECT IAC VALVE MALFUNCTION • Start the engine. • Disconnect IAC valve connector. • Is engine speed decreased?	Yes	Go to the next step.
3		No	Repair the IAC valve, then go to Step 9. (See IDLE AIR CONTROL (IAC) VALVE REMOVAL/INSTALLATION[ZJ, ZY, Z6].)
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 ENGINE SYMPTOM TROUBLESHOOTING[ZJ, ZY, Z6].)
4		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.
5		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.
6		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.
7	INSPECT THROTTLE BODY PASSAGE • Is throttle body clogged?	No	Go to the next step.
8	INSPECT ENGINE COMPRESSION • Inspect engine compression. (See COMPRESSION INSPECTION[ZJ, ZY, Z6].) • Is engine compression normal?	Yes	Go to the next step.
8		No	Overhaul 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 KOER self‐test. • Is the same DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION[ZJ, ZY, Z6].)
9		No	Go to the next step.
10	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE[ZJ, ZY, Z6].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE[ZJ, ZY, Z6].)
10		No	DTC troubleshooting completed.

With Throttle Valve Actuator

DTC P0505

Idle air control problem

DETECTION CONDITION

•  The PCM cannot control idle speed toward target idle speed while KOER self test.

POSSIBLE CAUSE

•  Improper operation of drive‐by‐wire control system

•  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

DTC P0505	Idle air control problem
DETECTION CONDITION	• The PCM cannot control idle speed toward target idle speed while KOER self test.
POSSIBLE CAUSE	• Improper operation of drive‐by‐wire control system • 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 • 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.
1		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 pending code or stored DTCs using the M-MDS. • Does P2502, P2503 or P2504 present?	Yes	Perform the applicable DTC troubleshooting. (See DTC TABLE[ZJ, ZY, Z6].)
2		No	Go to the next step.
3	VERIFY DRIVE-BY-WIRE CONTROL SYSTEM OPERATION • Perform the Drive‐by‐wire Control System Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION[ZJ, ZY, Z6].) • Does the electronic throttle control system operate 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 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 ENGINE SYMPTOM TROUBLESHOOTING[ZJ, ZY, Z6].)
4		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.
5		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.
6		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.
7	INSPECT THROTTLE BODY PASSAGE • Is throttle body clogged?	No	Go to the next step.
8	INSPECT ENGINE COMPRESSION • Inspect engine compression. (See COMPRESSION INSPECTION[ZJ, ZY, Z6].) • Is engine compression normal?	Yes	Go to the next step.
8		No	Overhaul 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 KOER self-test. • Is the DTC P0505 present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION[ZJ, ZY, Z6].)
9		No	Go to the next step.
10	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE[ZJ, ZY, Z6].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE[ZJ, ZY, Z6].)
10		No	DTC troubleshooting completed.