54
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.
