KC-2028

6/30/22, 12:58 PM
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AMT Control Housing Bench Testing - False
Failures
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The bench test of the AMT control housing using Tech tool, operation
4320-08-03-40 Gears, should be performed with the control housing
resting on its forks on a flat surface. If the unit is placed upside
down on the bench with the forks facing up the forks can rotate
out of position and catch on the housing during the test resulting
in a failed test result.
Forks up is fine for Manual manipulation of the forks and inspection.
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For automated testing using Tech Tool rest the shift housing on its
forks on a flat smooth surface.
The 2/3 and the 1/R shifter have a shift detent between them similar
to a regular manual gearbox will have to prevent shifting into two
gears at one time. If either of these shifters will not move when
shifting manually then check the other shifter and verify that it is in
the neutral position.
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During bench testing the shifter calibrations or tests may fail for out
of limits since there is nothing to limit the shifters from moving too
far. The range piston is the most likely to do this but the 1/R and 2/3
shifter can also show this. If the housing functions correctly and can
be shifted manually then installing it in the gearbox correctly will
likely elliminate the error seen from the shifters being unrestrained
UI
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during bench testing.
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The message below may be recieved when the range piston is in the
full extended or retracted position. Manually moving the piston from
the end stop and re-running the test will likely allow the test to run
until the piston reaches the end stop again and logs that error again.
if there are no logged fault codes for the position sensor in the TECU
memory no repairs should be needed.
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Tags
error 20
r1aad
amt shift housing
amt calibration
control housing
control housing fails test
bench test
calibration fail
Related links and attachments
KC-2028 4320-08-03-40 Gears IMG 1
KC-2028 4320-08-03-40 Gears IMG 2
KC-2028 4320-08-03-40 Gears IMG 3
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KC-2028 4320-08-03-40 Gears IMG 4
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