Automatic Shiftlock, Checking Function (Automatic Transmission) - BMW 5251 Service Manual

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Gearshift ~ i n k a ~ e l
Automatic shiftlock, checking function
(automatic transmission)
The automatic shiftlock uses an electric solenoid to lock the
selector lever in Park or Neutral. Depressing the foot bralte
with the ignition on energizes the solenoid, allowing the lever
to be moved into a drive gear. The solenoid is energized only
when the engine speed is below 2,500 rpm and the vehicle
speed is below 3 mph (5 kph). The solenoid is mounted in the
right side of the selector lever housing.
. . .
nir r
Shiftlock
4
Automatic shiftlock prevents drive gear selection until brake
pedal is depressed.
With engine running and car stopped, place selector lever
in Park or Neutral.
Without depressing bralte pedal, check that selector lever
is loclted in position (Parlt or Neutral).
Depress brake pedal firmly. Solenoid should click audibly.
Check that selector lever can now be moved out of Parlt or
Neutral.
parking brake on and with extreme caution.
solenoid
0012713
With selector lever in Park or Neutral and bralte pedal de-
pressed, raise engine above 2,500 rpm. Check that selec-
tor lever cannot be moved out of Park or Neutral.
If any faults are found check the electrical operation of the
shiftloclt solenoid and checlt for wiring faults to or from the
transmission control module (TCM). See 610 Electrical
Component Locations and ELE Electrical Wiring Dia-
grams.
NOTE-
NOTE-
The solenoidis controlled via the TCM, using brake pedalpo-
sition, engine speed, and road speed as controlling inputs.
The next test should be performed in an open area with the