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Idle Air Volume Learning NCEC0541 DESCRIPTION NCEC0541S01 “Idle Air Volume Learning” is an operation to learn the idle air vol- I Each time IACV-AAC valve, throttle body or ECM is replaced. I Idle speed or ignition timing is out of specification. PRE-CONDITIONING NCEC0541S04 Before performing “Idle Air Volume Learning”, make sure that all of I Battery voltage: More than 12.9V (At idle) I Engine coolant temperature: 70 - 99°C (158 - 210°F) I PNP switch: ON I Electric load switch: OFF On vehicles equipped with daytime light systems, set lighting I Cooling fan motor: Not operating I Steering wheel: Neutral (Straight-ahead position) I Vehicle speed: Stopped I Transmission: warmed-up (Drive vehicle for 10 minutes.) OPERATION PROCEDURE NCEC0541S02 With CONSULT-II NCEC0541S0201 1. Turn ignition switch “ON” and wait at least 1 second. 2. Turn ignition switch “OFF” and wait at least 9 seconds. 3. Start the engine and warm it up to normal operating tempera- 4. Check that all items listed under the topic “PRE-CONDITION- SEF311Q SEF452Y SEF454Y SEF455Y BASIC SERVICE PROCEDURE QG16 I 18DE Idle Air Volume Learning EC-33 |