Lotus TURBO ESPRIT Service Manual page 440

SECTION L O
Page 67
3.
ldle Up Relay
Location: Coil box
Mating connector colour: Black
Change over relay (schimatic as shown item one). Controlled by idle up
control relay. De-energises idle up solenoid, when air condition compressor
i s
operating, below 1400
R. P.M.
4. Fast Warm
Up
Relay
Location: Coil box
Mating connector colour: Black
Changeover relay (schimatic as shown item one). Controlled by high temperature
switch energises ignition solenoid when the high temeprature switch i s closed
circuit
.
Energises idle up solenoid and fuel by-pass speed sensing relay when the
high temperature switch i s open circuit
.
5.
ldle Up Control Relay
Location: Coil box
Mating connector colour: Black
Changeover relay (schimatic as shown i n itemone). Controlled by fuel by-pass
speed sensing relay.
Energised when
R. P.M.
has exceeded 1600 and de-energised below 1400
R. P. M.
Switches out idle up relay above 1600
R. P.M.
6. Fuel By-Pass Speed Sensing Relay
Location: Coil box
Mating connector colour: Black. Additional information see LD 16.
88a
3 1
Controlled by low tersion ignition pulses to give
31e
l 5
engine speed serrring, also thermally inhibited
operation by fast warm up relay.
Energises fuel by-pass valve and econ tell-tale on
deceleration from an engine
R. P.M.
of greater
1
than 1600 until 1400
R.P.M.
when the throttles
31 b
are closed.
This
unit also supplies a 12 volt
posotive to the idle changeover relay and idle
up contiol relay supply when engine
R.P.M. has
exceeded 1600 and maintains that supply until
engine
R.P.M.
has dropped to 1400.
7.
Fuel By- Pass Valve
Location: Rear of induction air box
Mating connector colour: Black. Additional information see LD 16.
Electrically controlled vacuudair valve, controlled by the fuel by-pass speed
sensing relay i n conjunction with the fuel by-pass control relay.
8.
"Econ" Tell-Tale Lamp
-
Location: Right
hand
bank o f tell tale lamps on instrument binnacle.
Tell-tale lamp to indicate to the driver when the fuel by-pass valve i s operating.