Range Rover L322 Automatic Transmission - ZF 5HP24 Gear Selector Lever Assembly
AUTOMATIC TRANSMISSION – ZF 5HP24
DESCRIPTION AND OPERATION 44-2-39
High/Low Range Selector Switch
The high/low range switch is located on the selector lever cover, on the right hand side of the selector lever. The switch
can be identified by the a high/low range legend graphic and the switch lever is coloured white. High or low range can
be selected using this switch providing the vehicle speed is within defined limits and the gear selector lever is in the
neutral position.
TRANSFER BOX, DESCRIPTION AND OPERATION, Description.
Hill Descent Control (HDC) Switch
The HDC switch is located on the selector lever cover, on the left hand side of the selector lever. The switch can be
identified by the HDC legend graphic and the switch lever is coloured yellow. Operation of the HDC switch it not
directly related to automatic transmission operation.
BRAKES, DESCRIPTION AND OPERATION, Foundation Brakes.
Selector Position LED Display
The selector position LED display is located on the selector lever cover, between the HDC and high/low range
switches. The display has a graphic which shows the lever positions P, R, N, D, M/S and +/–. The P, R, N, D and M/
S positions each have a small, red LED which illuminates when that position is selected. The +/– positions do not have
an LED.
The LED display is controlled by the selector lever position switch, with the two components connected via a five wire
ribbon cable. The LED display is powered from the Body Control Unit (BCU) and remains illuminated until the BCU is
in sleep mode. The LED display is active at all times when the ignition is on.
Selector Lever Position Switch
The selector lever position switch is located on the right hand side of the selector lever assembly. The switch has a
moving contact which is connected to the selector lever. As the lever is moved, the sliding contact moves in the switch
completing a circuit with four further contacts in the switch which represent the four lever positions; P, R, N and D.
The switch is connected to the selector position LED display via a ribbon cable and provides the power for the display
LED's. The switch receives its power supply from the BCU.
Manual/Sport Switch
The manual/sport switch is located at the rear of the selector lever assembly. The manual/sport switch is a cam
operated microswitch. A lever with a roller is attached to the switch body. When the selector lever is moved from the
automatic 'D' position to the manual/sport 'M/S' position, the roller contacts a cam on the selector lever which
depresses the switch lever and operates the switch. The switch contacts remain closed when the selector lever is in
the manual/sport position.
The operation of the switch completes an earth path which is sensed by the EAT ECU which switches the transmission
operation to sport when ’M/S’ is selected and deselects sport mode when ’D’ (automatic operation) is reselected. The
completed earth path is connected to the EAT ECU via the M/S LED on the selector lever display which is illuminated
by an output from the ECU when M/S is selected.
Selector Cable
The selector cable is a Bowden type cable that connects the selector lever to the manual selector spool valve. A ’C’
clip secures the outer cable to the selector lever assembly. The inner cable is secured to an arm which is connected
to the selector lever via a 'U' shaped bracket and pin.
The transmission end of the outer cable is secured to a bracket on the transmission by a clamp nut. The transmission
has an operating lever which is attached to and operates the manual selector control spool valve. The inner cable is
attached to the operating lever by a clamp bush and locknut. The clamp bush allows for the adjustment of the selector
cable.