DESCRIPTION AND OPERATION
RANGE ROVER 4.45
Shift Interlock Solenoid
To lock the selector lever assembly, the EAT ECU (C0193) provides a feed to the shift
interlock solenoid (C0673) on a BP wire. An earth path is provided by the EAT ECU (C0193)
on an NP wire.
Steptronic
When manual (Steptronic) mode is selected, the EAT ECU selects gears according to inputs
received from the Steptronic switch. The EAT ECU (C0193) provides two feeds to the
Steptronic switch (C1664); one on a UY wire, one on a US wire. If a downshift is requested
via the selector lever, a momentary earth is created. Current on the UY wire is allowed to
flow across the switch to earth on an NB wire. Sensing this, the EAT ECU downshifts 1 gear.
If an upshift is requested via the selector lever, a momentary earth is created. Current on the
US wire is now allowed to flow across the switch to earth on an NB wire. Sensing this, the
EAT ECU upshifts 1 gear.
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