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learned'. In this case, you must use the diagnostic device to
perform tooth learning for the car. After tooth 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 'tooth not learned' is present,
tooth learning must be performed.
POWER BALANCE
The cylinder power balance test can locate cylinders that are
causing a power deficit and not contributing to the balance and
performance of the engine. Using this test in conjunction with
cylinder compression and cylinder leakage tests can identify the
problem.
This test typically measures the speed drop of each cylinder and
tests its effectiveness compared to other cylinders. It measures
the amount a particular cylinder contributes to the total power
output of the engine. The total output of an engine is the sum of all
the power produced by each cylinder. The cylinder power balance
test uses the effect of the cylinder on the engine speed to
determine this power. When the engine is running, the spark plug
or primary circuit is grounded. This prevents the spark plug from
firing in that cylinder, thus preventing combustion in that cylinder.
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