Mitsubishi LANCER EVOLUTION-IV 1998, Руководство по ремонту, Страница: 241 / 526

MPI –
Troubleshooting
13-18
5. SERVICE DATA LIST
<EVOLUTION-IV>
Item
No. Inspection
item Inspection contents Normal condition
11 Oxygen
sensor Engine: After having been warmed
up
Air/fuel mixture is made leaner when
When at 4,000 r/min, engine is
suddenly decelerated 200 mV or less
Air/fuel mixture is made leaner when
decelerating, and is made richer
when racing.
When engine is suddenly
raced 600 – 1,000 mV
Engine: After having been warmed
up
The oxygen sensor signal is used to
Engine is idling 400 mV or less
(Changes) The oxygen sensor signal is used to
check the air/fuel mixture ratio, and
control condition is also checked by
the ECU.
2,500 r/min
(Changes)
600 – 1,000 mV
12 Air flow
sensor*
D
Engine coolant temperature:
80
95
_
C
Engine is idling 17 – 43 Hz
sensor* 80 – 95
_
C
D
Lamps, electric cooling fan and
all accessories: OFF
2,500 r/min 46 – 86 Hz
all accessories: OFF
D
Transmission: Neutral
Engine is raced Frequency increases
in response to racing
13 Intake air
temperature
sensor Ignition switch: ON or with engine
running When intake air temperature
is –20
_
C
–20
_
C
sensor
When intake air temperature
is 0
_
C
0
_
C
When intake air temperature
is 20
_
C
20
_
C
When intake air temperature
is 40
_
C
40
_
C
When intake air temperature
is 80
_
C
80
_
C
14 Throttle
position Ignition switch: ON Set to idle position 300 – 1,000 mV
position
sensor
Gradually open Increases in proportion
to throttle opening
angle
Open fully 4,500 – 5,500 mV
16 Power
supply
voltage Ignition switch: ON System voltage
18 Cranking
signal Ignition switch: ON Engine: Stopped OFF
g
(ignition
switch-ST)
Engine: Cranking ON
NOTE
*:
When the car is new (distance it travelled is less than 500 km), output frequency of the air flow sensor may
become about 10% higher.