Variable Valve Timing: Testing and Inspection

Exhaust Valve Timing Control Learning (M/T models)

DESCRIPTION
Exhaust Valve Timing Control Learning is an operation to learn the characteristic of exhaust valve timing control magnet retarder by comparing the target angle of exhaust camshaft with the actual retarded angle of exhaust camshaft. It must be performed each time exhaust valve timing control magnet retarder is disconnected or replaced, or ECM is replaced.

OPERATION PROCEDURE

With CONSULT-II
1. Start engine and warm it up to normal operation temperature.
2. Set shift lever in neutral position and confirm that following electrical or mechanical loads are not applied.
- Headlamp switch is OFF
- Air conditioner switch is OFF
- Rear defogger switch is OFF
- Steering wheel is in the straight-ahead position, etc

3. Keep the engine speed between 1,800 and 2,000 rpm.




4. Select "EXH V/T CONTROL LEARN" in "WORK SUPPORT" mode with CONSULT-II.
5. Touch "START" and wait 20 seconds.




6. Make sure that "CMPLT" is displayed on CONSULT-II screen.
Learning completed : CMPLT
Learning not yet : YET

Without CONSULT-II
1. Start engine and warm it up to normal operation temperature.
2. Set shift lever in neutral position and confirm that following electrical or mechanical loads are not applied.
- Headlamp switch is OFF
- Air conditioner switch is OFF
- Rear defogger switch is OFF
- Steering wheel is in the straight-ahead position, etc

3. Keep the engine speed between 1,800 and 2,000 rpm at 20 seconds.