Lotus 2004 ELISE Service Notes page 243

Lotus Service Notes
JJ.13 - ELECTRO-HYDRAULIC UNIT
The electro-hydraulic unit is located on the driver's side in the front services compartment, and is flexibly
mounted in a support frame via three isolator rubber bushes. The support frame itself is fixed to the front
suspension damper top mounting bracket and windscreen frame butress via another three rubber bobbins. A
single 27 pin electrical connector plug is provided with a sliding retainer to aid its mating with the vehicle
harness.
CAUTION: Do not disconnect or connect the main connector plug with the ignition switched on. Switch
off the ignition and disconnect the main connector plug before carrying out any electrical welding operations on
the car.
Hydraulic pipe connections to the unit comprise two input pipes from the master cylinder (one for the front
circuit, one for the rear) and four output pipes, one for each of the wheel brakes. Note that all hydraulic
connections are identified by engraved markings on the unit, with further protection against incorrect connec-
tion provided by the use of two different brake pipe union sizes: M10 x 1.0 and M12 x 1.0.
To Remove Electro-Hydraulic Unit
When removing the unit, beware of dripping brake fluid and take appropriate precautions to prevent
damage to paintwork.
1. Remove the driver's side front access panel, radiator outlet louvre and wheelarch liner.
2. Switch off the ignition before drawing out the retainer slide from the connector plug to release the harness
from the unit.
3. Label each of the hydraulic pipes before disconnecting from the unit and immediately capping the pipes
and plugging the ports to reduce the spillage of brake fluid, and to prevent the ingress of dirt.
4. Release the three fixings securing the controller mounting bracket to the damper bracket and windscreen
frame butress, and withdraw the unit and mounting cradle.
5. To remove the controller from the cradle, unscrew the two socket head pins supporting the sides of the
unit, and withdraw the unit from the third grommet at the end of the motor casing.
Mounting
grommet
Electro-
hydraulic
unit
Socket
head pin
Damper bracket
Page 28
Section JJ
Mounting
bobbin
Controller
mounting
bracket
j190