Work Procedure

1. PRECONDITIONING 

   Make sure that all of the following conditions are satisfied.

   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 - 105°C (158 - 221°F)
   • Selector lever: P or N
   • Electric load switch: OFF

   (Air conditioner, headlight, rear window defogger)

   On vehicles equipped with daytime running 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
     • With M.U.T-III SE

       Drive vehicle until "ATF TENP SEN" in "DATA MONITOR" mode of "CVT" system indicates less than 0.9 V

     • Without M.U.T-III SE

       Drive vehicle for 10 minutes.

   >>

   GO TO  2.

2. IDLE AIR VOLUME LEARNING 

   With M.U.T.-III SE

   1. Perform Accelerator Pedal Released Position Learning. Refer to DESCRIPTION .
   2. Perform Throttle Valve Closed Position Learning. Refer to DESCRIPTION .
   3. Start engine and warm it up to normal operating temperature.
   4. Select "IDLE AIR VOL LEARN" in "WORK SUPPORT" mode of "ENGINE".
   5. Touch "OK" and wait 20 seconds.

   Is "Completed" displayed on M.U.T-III SE screen? 

   YES >>

   GO TO  3.

   NO >>

   GO TO  4.

3. CHECK IDLE SPEED AND IGNITION TIMING 

   Rev up the engine two or three times and make sure that idle speed and ignition timing are within the specifications. For specification, Refer to IDLE SPEED: SERVICE DATA  and IGNITION TIMING: SERVICE DATA .

   Is the inspection result normal? 

   YES >>

   INSPECTION END

   NO >>

   GO TO  4.

4. DETECT MALFUNCTIONING PART 

   Check the following

   • Check that throttle valve is fully closed.
   • Check PCV valve operation.
   • Check that downstream of throttle valve is free from air leakage.

   Is the inspection result normal? 

   YES >>

   GO TO  5.

   NO >>

   Repair or replace malfunctioning part.

5. DETECT MALFUNCTIONING PART 

   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". Refer to COMPONENT FUNCTION CHECK .

   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.

>>

INSPECTION END