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DTC P0506 ISC SYSTEM EC-409 < SERVICE INFORMATION > [VQ35DE] C D E F G H I J K L M A EC N P O DTC P0506 ISC SYSTEM Description INFOID:0000000001326246 NOTE: On Board Diagnosis Logic INFOID:0000000001326247 DTC Confirmation Procedure INFOID:0000000001326248 NOTE: least 10 seconds before conducting the next test. • If the target idle speed is out of the specified value, perform, EC-85, "Idle Air Volume Learning" , before conducting DTC Confirmation Procedure. For the target idle speed, refer to the TESTING CONDITION: − 10 ° C(14 ° F). 1. Start engine and warm it up to normal operating temperature. 2. Turn ignition switch OFF and wait at least 10 seconds. 3. Start engine and run it for at least 1 minute at idle speed. 4. Check 1st trip DTC. 5. If 1st trip DTC is detected, go to Diagnosis Procedure INFOID:0000000001326249 1. CHECK INTAKE AIR LEAK 1. Start engine and let it idle. 2. Listen for an intake air leak after the mass air flow sensor. OK or NG OK >> GO TO 2. NG >> Discover air leak location and repair. 2. REPLACE ECM 1. Stop engine. 2. Replace ECM. 3. Perform initialization of IVIS(NATS) system and registration of all IVIS(NATS) ignition key IDs. BL-187, "ECM Re-Communicating Function" 4. 5. EC-85, "Accelerator Pedal Released Position Learning" 6. EC-85, "Throttle Valve Closed Position Learning" . 7. EC-85, "Idle Air Volume Learning" DTC No. Trouble diagnosis name DTC detecting condition Possible cause P0506 Idle speed control sys- The idle speed is less than the target idle speed • Electric throttle control actuator |