Lotus 2004 ELISE Service Notes page 244

Lotus Service Notes
6. To refit, reverse the removal procedure, tightening the two socket head mounting pins to 9 Nm, and the
brake pipe unions (both sizes) to 16 Nm, taking care to connect the brake pipes to the correct ports on the
hydraulic block - see diagram. Press in the retainer slide to connect the harness plug.
RH rear LH rear
Hydraulic
control
unit
7. Bleed the unit using the procedure detailed in sub-section JJ.3.
8. Verify correct connection by using the 'Lotus Scan' tool in actuator tests with the car on a wheel free lift.
Check that operation of each solenoid valve affects the appropriate wheel.
Service Breakdown of Electro-Hydraulic Unit
Service parts for this unit are limited to; the hydraulic modulator with pump motor; and the coil integrated
module which comprises the ECM and solenoid pack.
To separate the module from the hydraulic block, release the 'Torx' screws and withdraw the module from
the solenoid valve spigots. When refitting, check that the gasket is correctly located around the solenoid coil
cluster, before mating with the hydraulic block and fitting the screws.
Note that component parts are calibrated specifically for the Lotus Elise. Do not use parts from other sources.
JJ.14 - WHEEL SPEED SENSORS
A wheel speed sensor is integrated into each of the four hub bearing assemblies and supplies a signal to
the ABS control module. The module outputs a road speed signal to the engine ECM, and also to the instru-
ment pack for speedometer operation.
Output from each wheelspeed sensor can be checked using the Scan 2 tool, and if found to be faulty or
absent, the complete hub assembly should be renewed - refer to sub-section CI.5 (front) or DH.4 (rear).
JJ.15 - DATA LINK CONNECTOR (DLC)
The Data Link Connector (DLC) is a 16 terminal elec-
trical connector plug, complying with SAE J 1962, which
provides a means of communication with the ABS and en-
gine management electronic control units. The connector
is used in service to connect electronic diagnostic equip-
ment such as the 'Lotus Scan' hand held scanner tool which
allows system interrogation including the reading of trou-
ble codes.
The DLC is either tied to the main harness at the front
of the passenger footwell, or secured to the centre under-
side of the scuttle beam.
RH front LH front
MC rear MC front
Data Link
Connector
Section JJ
Master
cylinder
j192
em235
Page 29