Lotus TURBO ESPRIT Service Manual page 439

Page 66
.
LD. 28
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ELECTRICAL COMPONENT FUNCTION
&
FAULT DIAGNOSIS
1 , Idle Change Over Relay
Location: Coil box
Mating connector colour: Black
Change over relay controlled by fuel by-pass speed sensing relay, energised when
R.P.M.
has exceeded 1600
R.P.M.
and de-energised below 1400
R.P.M.
Switches pin
7
of electronic control unit to ground, when fuel by-pass control
relay
i s
energised, on deceleration until 1400
R.P.M.
when i t changes over to
switch pin 6 of electronic control unit to ground
Normally open change over relay
a
Terminals 85 and
8 6
relay windings
Terminals 30/51, 87A and 87 switching
contacts
Lotus Part A079M6141F
(Silver)
Fuel By-Pass Control Relay
Location: Coil box
Mating connector colour: Blue
Double contact relay controlled by ignition ( h e
23
i n fusebox) and throttle
position switch. Energised when throttle is i n the closed position.
Switches idle change over relay and fuel by-pass valve to ground when ignition
is on and throttles are i n the closed position.
Terminals
85
and86 relby hindin@
Terminals 30, 87 and 87b switching contacts
Lotus Part AO82M6182
(Grey)