Lotus TURBO ESPRIT Service Manual page 402

Page 30
SECTION LD
If
the duty cycle or exhaust gas analysis are outside specification, remove the
wiring grommet from the LH engine bay wal
I,
and extract the Lambda sensor
electrical connector. Disconnect the single spade connector to obtain an open
loop exhaust gas reading. (Larger connector block i s Lambda heating coil).
If
the mixture setting is correct disconnecting the Lambda sensor should have n o
effecfon idle rpm.
Refer to the following table:
I
O.K.
I
O.K.
I
SyrtemSatisfactory
I
Over 55%
See
Section
Under 45%
Remark
Closed Loop
Duty Cycle
i i )
l
n jec tor Distribution LD 24E
3
i i i ) Throttle Imbalance
LD
24P
C O Readings
Hiah
1
O.K.
I
i) Exhaust System Leaking
I
~ ~ 2 4 0
1
Closed
Loop
O.K.
Open
Loop
Low
I
0 . K
.
1
Sensor Faulty
I I
Low
-
O.K.
i)
M.C.U. Setting too Lean
i i ) Inlet System
Air
Leak
High
L b 24H
LD 2 4 0
ii)
Sensor Faulty
M.C.U. Setting too Rich
LD 24H