48
Figure 5-26 Sample of gearbox matching function (screen 1)
5.
Wait until the message ‘
Successful operation
’ popes up.
5.9 GEAR LEARNING
The crankshaft position sensor learns crankshaft tooth machining tolerance
and saves to the tablet to more accurately diagnose engine misfires. If gear
learning is not performed for a car equipped with a Delphi engine, the MIL
turns on after the engine is started. The diagnostic device detects the DTC
P1336 'Gear not learned'. In this case, you must use the diagnostic device
to perform gear learning for the car. After gear learning is successful, the
MIL turns off. This function can complete the self-learning of the gearbox
and improve the quality of shifting.
After the engine ECU, crankshaft position sensor, or crankshaft flywheel is
replaced, or the DTC 'gear not learned' is present, gear learning must be
performed.
The operation guidelines of the Gear learning function are shown as
below:
1. Enter the
Gear learning
menu and choose relevant models
according to the vehicle being tested.
2. Turn on the ignition switch to start the vehicle.
3. Enter the
Tooth Learning
menu.
