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INSPECTION AND ADJUSTMENT EC-475 < BASIC INSPECTION > [VQ40DE] C D E F G H I J K L M A EC N P O 11. Wait 20 seconds. 12. Rev up the engine two or three times and check that idle speed and ignition timing are within the specifi- cations. 13. If idle speed and ignition timing are not within the specification, Idle Air Volume Learning will not be carried out successfully. In this case, find the cause of the incident by referring to the DIAGNOSTIC PROCE- DIAGNOSTIC PROCEDURE If idle air volume learning cannot be performed successfully, proceed as follows: 1. Check that throttle valve is fully closed. 2. Check PCV valve operation. 3. Check that downstream of throttle valve is free from air leakage. 4. When the above three items check out OK, engine component parts and their installation condi- 5. If any of the following conditions occur after the engine has started, eliminate the cause of the ITEM SPECIFICATION Idle speed M/T: 625 ± 50 rpm (in Neutral position) A/T: 625 ± 50 rpm (in P or N position) Ignition timing M/T: 15 ± 5 ° BTDC (in Neutral position) A/T: 15 ± 5 ° BTDC (in P or N position) SEC897C |