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
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.
Read carefully and complete the requisites listed before performing the
gear learning function. And press OK after completing the instructions
shown
Figure 5-27 Sample of gear learning function (screen 1)
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