Mitsubishi Lancer Evolution 7. Manual — part 200
MPI -
Troubleshooting
13A-99
Inspection Procedure 31
Intercooler water spray lamp system
Probable cause
The engine-ECU illuminates the intercooler water spray lamp when the
intercooler water spray switch (automatic) is ON.
D
Intercooler water spray lamp bulb dead
D
Ignition switch malfunction
D
Intercooler water spray lamp circuit disconnection,
short-circuit, or connector contact defect
D
Intercooler water spray switch circuit disconnection,
short-circuit, or connector contact defect
D
Engine-ECU malfunction
OK
Check and repair the harness
between the combination meter and
engine-ECU.
D
Check for damage of the signal
cable.
NG
OK
Replace the intercooler water spray
lamp.
Check whether intercooler water
spray lamp bulb is dead. (Refer to
GROUP 54 - combination meter.)
NG
NG
Repair
OK
Check and repair the harness
between the combination meter and
engine-ECU.
D
Check for disconnection and
short-circuit of the signal cable.
Check the following connector:
C-02, C-130
OK
Measure at the C-122 engine-ECU
connector.
D
Disconnect the connector to
measure at the harness side.
D
Ignition switch: ON
D
Voltage between terminal No. 35
and earth
OK: System voltage
OK
Check the Inspection Procedure 30:
Intercooler water spray circuit
system. (Refer to P.13A-97.)
Check the intercooler water spray
lamp illumination.
D
Disconnect the C-122
engine-ECU connector, and earth
the terminal No. 35.
D
Ignition switch: ON
OK: The intercooler water spray
lamp illuminates.
NG
NG
Measure at the C-01 combination
meter connector.
D
Disconnect the connector to
measure at the harness side.
D
Ignition switch: ON
D
Voltage between terminal No. 9
and earth
OK: System voltage
OK
NG
Repair
OK
Check the following connectors:
C-213, C-210, C-201, C-29 <L.H. drive
vehicle>
NG
Repair
Check the harness between the
combination meter and ignition
switch.
D
Check for damage of the power
cable.
OK
Check the harness between the
combination meter and ignition
switch.
D
Check for disconnection and
short-circuit of the power cable.
Repair
Replace the ignition switch.
OK
Check the following connectors:
C-213, C-210, C-201, C-01, C-29
<L.H. drive vehicles>
NG
Repair
OK
Check the following connectors:
C-02, C-122, C-130
NG
Repair
NG
MPI -
Troubleshooting
13A-100
Inspection Procedure 32
Ignition coil (integrated power transistor) system
Probable cause
The engine-ECU allows the ignition coil primary current to flow intermittently by
turning the power transistor in the unit OFF and ON.
D
Ignition coil malfunction
D
Spark plug malfunction
D
Spark plug cable malfunction
D
Ignition primary circuit disconnection, short-circuit, or
connector contact defect
D
Engine-ECU malfunction
OK
Check and repair the harness between
the ignition coil and engine-ECU.
D
Check for disconnection of the
output cable.
OK
To the next page
(3) NG
Check and repair the harness between
the ignition coil and body earth.
D
Check for disconnection and
damage of the earth cable.
NG
Replace the engine-ECU.
OK
Check the trouble symptoms.
OK
Intermittent malfunction
(Refer to GROUP 00 - Points to Note
for Intermittent Malfunctions.)
NG
OK
Check the harness between the
ignition coil and engine-ECU.
D
Check for disconnection of the
output cable.
Repair
NG
NG
Check the following connector:
C-126
Repair
(2) NG
Measure at the C-126 engine-ECU
connector.
D
Measure the engine-ECU terminal
voltage.
D
Disconnect the connectors B-114
and B-119.
D
Engine: Cranking
(1) Voltage between terminal No. 10,
terminal No. 23 and earth
OK
Check the following connector:
C-126
OK
Check and repair the harness between
the ignition coil and ignition coil relay.
D
Check for short-circuit of the power
cable.
OK
Check the ignition coil relay.
(Refer to GROUP 16 - Engine
Electrical.)
OK
Measure at the B-119 and B-123
ignition coil connectors.
D
Disconnect the connector to
measure at the harness side.
(1) Voltage between terminal No. 1 and
earth
(Ignition switch: ON)
OK: System voltage
(2) Voltage between terminal No. 3 and
earth
(Engine: Cranking)
OK: 0.5 - 4.0 V
(3) Resistance between terminal No. 2
and earth
OK: 2 Ω or less
(1) NG
Check the following connector:
B-09X
NG
Repair
OK
Check the ignition coil.
(Refer to GROUP 16 - Ignition Device.)
OK
Replace the ignition coil.
OK
Check the following connectors:
B-114, B-119
NG
Repair
OK
Check the spark plug.
(Refer to GROUP 16 - Ignition Device.)
NG
Replace the spark plug.
Check the spark plug cable.
(Refer to GROUP 16 - Ignition Device.)
NG
Replace the spark plug cable.
NG
Repair
MPI -
Troubleshooting
13A-101
NG
Replace the engine-ECU.
Check the trouble symptoms.
OK
Intermittent malfunction
(Refer to GROUP 00 - Points to Note
for Intermittent Malfunctions.)
OK
Check the harness between the
ignition coil and engine-ECU.
D
Check for damage of the output
cable.
NG
Repair
OK
Check the harness between the
ignition coil and ignition coil relay.
D
Check for damage of the power
cable.
NG
Repair
From the previous page
MPI -
Troubleshooting
13A-102
DATA LIST REFERENCE TABLE
NOTE
*1. In a new Vehicle [driven approximately 500 km or less], the air flow sensor output frequency time
is sometimes 10% longer than the standard time.
*2. The injector drive time represents the time when the cranking speed is at 250 r/min or below when
the power supply voltage is 11 V.
*3. In a new vehicle [driven approximately 500 km or less], the injector drive time is sometimes 10%
longer than the standard time.
*4. In a new vehicle [driven approximately 500 km or less], the step of the stepper motor is sometimes
30 steps greater than the standard value.
Item
No.
Inspection
item
Inspection contents
Normal condition
Inspection
procedure
No.
Reference
page
11
Oxygen
sensor
(front)
Engine: After having
warmed up
(Air/fuel mixuture is
made leaner when
When at 4,000 r/min,
engine is suddenly de-
celerated
200 mV or less
Code No.
P0130
13A-24
made leaner when
decelerating, and is
made richer when rac-
ing.)
When engine is sud-
denly raced
600 - 1,000 mV
Engine: After having
warmed up
(The oxygen sensor
(front) signal is used
to check the air/fuel
Engine is idling
400 mV or less ↔
600 - 1,000 mV
(Varies)
to check the air/fuel
mixture ratio, and
control condition is
also checked by the
engine-ECU.)
2,500 r/min
12
Air flow
sensor*
1
D
Engine coolant
temperature:
Idle operation
17 - 43 Hz
-
-
sensor*
1
temperature:
80 - 95_C
D
Lightning and all
2,500 r/min
40 - 100 Hz
D
Lightning and all
accessories:
OFF
D
Transmission:
Neutral
Acceleration
According to ac-
celeration,
fre-
quency is ampli-
fied.
13
Intake air
temperature
sensor
Ignition switch: “ON”
or engine running
When intake air temper-
ature is -20_C
-20_C
Code No.
P0110
13A-13
sensor
When intake air tem-
perature is 0_C
0_C
When intake air tem-
perature is 20_C
20_C
When intake air tem-
perature is 40_C
40_C
When intake air tem-
perature is 80_C
80_C
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