Procedure To Complete Iavl When Idle Speed Needs To Be Reduced
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If you confirm the idle, in park or neutral, is more than 25 rpm above specification (with the engine warm), and/or dtc p0507 (isc system) is stored, note: • this incident may be the result of recent cleaning or replacement of the throttle body. The vehicle “in-use” learned idle (iavl) may be higher after throttle body deposits are reduced (by cleaning or replacement). • if dtcs other than p0507 are stored, you must correct the cause for those dtcs first. After correcting other dtcs, if you still have a p0507 and/or an idle condition above specification, continue with this bulletin. Actions to reduce idle rpm, perform the following in this order until iavl successfully completes: 1. Check engine for vacuum leaks. 2. Perform iavl procedure. 3. For 2002 and 2003 models: check for newer ecm reprogramming data. If it’s available, perform reprogramming, then try iavl again. 2004 and 2005 models: skip this step. 4. Reduce idle speed manually: a. Disconnect injectors one at a time until iavl completes (see step 4 of the service procedure for details), b. Reconnect the injectors, clear dtcs, and perform final iavl. Service procedure note: after completing repairs in this procedure, make sure any stored dtcs are erased. 1. Make sure there are no engine vacuum leaks. Repair any vacuum leaks that are found. Make sure to check: • hoses • intake manifold • ducting between intake manifold and mafs 2. Perform idle air volume learning (iavl) procedure as follows. Note: the iavl procedure will normally complete within 2 minutes after procedure start. A. Make sure all dtcs are cleared (erased). B. Use consult-iI to confirm / perform the following pre-conditions: note:
If you confirm the idle, in park or neutral, is more than 25 rpm above specification (with the engine warm), and/or dtc p0507 (isc system) is stored, note: • this incident may be the result of recent cleaning or replacement of the throttle body. The vehicle “in-use” learned idle (iavl) may be higher after throttle body deposits are reduced (by cleaning or replacement). • if dtcs other than p0507 are stored, you must correct the cause for those dtcs first. After correcting other dtcs, if you still have a p0507 and/or an idle condition above specification, continue with this bulletin. Actions to reduce idle rpm, perform the following in this order until iavl successfully completes: 1. Check engine for vacuum leaks. 2. Perform iavl procedure. 3. For 2002 and 2003 models: check for newer ecm reprogramming data. If it’s available, perform reprogramming, then try iavl again. 2004 and 2005 models: skip this step. 4. Reduce idle speed manually: a. Disconnect injectors one at a time until iavl completes (see step 4 of the service procedure for details), b. Reconnect the injectors, clear dtcs, and perform final iavl. Service procedure note: after completing repairs in this procedure, make sure any stored dtcs are erased. 1. Make sure there are no engine vacuum leaks. Repair any vacuum leaks that are found. Make sure to check: • hoses • intake manifold • ducting between intake manifold and mafs 2. Perform idle air volume learning (iavl) procedure as follows. Note: the iavl procedure will normally complete within 2 minutes after procedure start. A. Make sure all dtcs are cleared (erased). B. Use consult-iI to confirm / perform the following pre-conditions: note:
the iavl procedure will self-cancel if any of the following pre-conditions are not met and maintained for as long as the procedure is running. C. Turn ignition switch “off” and wait at least 10 seconds. D. Start the engine and let it idle for at least 30 seconds. E. Using consult-ii, select work support > idle air vol learn. F. Touch start and wait 20 seconds to 2 minutes. • if “cmplt” is displayed on consult-iI screen; go to g, next
step. • if “incmp” is displayed within 2 minutes, or test is not
finished within 2 minutes, “idle air volume learning” was not carried
out successfully; go to step h. G. Rev up the engine two or three
times, then let the engine idle. Verify the idle speed is within
specifications. Refer to the ec section of the appropriate service manual for specifications. If ok, procedure ends here. If not, go to step h. H. If iavl did not complete
and you’re sure you: • set all of the preconditions exactly as shown
in the chart above, and • performed steps a through f exactly as shown
above. Go to step 3 on the next page.
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