Postby smj999smj » Wed May 23, 2012 9:57 am
The learning procedure can be kind of tricky if you don't have a scantool. First, the stored trouble codes should be erased before attempting it. Second, the following conditions need to be met before the procedure can be started:
Learning will be cancelled if any of the following conditions are missed for even a moment.
Battery voltage: More than 12.9 V (At idle)
Engine coolant temperature: 70 - 100 °C (158 - 212 °F)
PNP switch: ON
Electric load switch: OFF (Air conditioner, headlamp, rear window defogger)
On vehicles equipped with daytime light systems, set lighting switch to the 1st position to light only small lamps.
Steering wheel: Neutral (Straight-ahead position)
Vehicle speed: Stopped
Transmission: Warmed-up
For A/T models with CONSULT-II, drive vehicle until "FLUID TEMP SE" in "DATA MONITOR" mode of "A/T" system indicates less than 0.9 V .
For A/T models without CONSULT-II and M/T models, drive vehicle for 10 minutes.
If idle air volume learning cannot be performed successfully, proceed :
Check that throttle valve is fully closed.
Check PCV valve operation.
Check that downstream of throttle valve is free from air leakage.
When the above three items check out OK, engine component parts and their installation condition are questionable. Check and eliminate the cause of the incident. It is useful to perform "TROUBLE DIAGNOSIS - SPECIFICATION VALUE". See: Powertrain Management\Computers and Control Systems\Testing and Inspection\Monitors, Trips, Drive Cycles and Readiness Codes\Specification (SP) Value
If any of the following conditions occur after the engine has started, eliminate the cause of the incident and perform "Idle air volume learning" all over again:
Engine stalls.
Erroneous idle.