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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.
