ignition MITSUBISHI LANCER EVOLUTION 2007 Service Repair Manual

MPI -Troubleshooting13A-108
Item
No.Reference
page Inspection
procedure
No. Normal condition Inspection contents Drive contents Inspection
item
21Fan
controllerRadiator fan
motor is
driven.Ignition switch: “ON”Fan motor rotates
at high speed.Procedure
No. 2413A-87
36Secondary
air control
solenoid
valveSolenoid valve
turns from
OFF to ON.Ignition switch: “ON”Sound of opera-
tion can be heard
when solenoid
valve is driven.Procedure
No. 2913A-96
37Condenser
fan (HI)Condensor
fan motor is
driven.Ignition switch: “ON”Fan motor rotates
at high speed.Procedure
No. 2513A-89
38Condenser
fan (LOW)Second air
control
solenoid valveIgnition switch: “ON”Fan motor rotates
at low speed.
CHECK AT THE ENGINE-ECU TERMINALS
TERMINAL VOLTAGE CHECK CHART
1. Connect a needle-nosed wire probe (test harness:
MB991223 or paper clip) to a voltmeter probe.
2. Insert the needle-nosed wire probe into each of the
engine-ECU connector terminals from the wire side, and
measure the voltage while referring to the check chart.
NOTE
(1) Make the voltage measurement with the engine-ECU
connectors connected.
(2) You may find it convenient to pull out the engine-ECU
to make it easier to reach the connector terminals.
(3) The checks can be carried out off the order given
in the chart.
Caution
Short-circuiting the positive (+) probe between a
connector terminal and earth could damage the
vehicle wiring, the sensor, engine-ECU or all of them.
Be careful to prevent this!
3. If voltmeter shows any division from standard value, check
the corresponding sensor, actuator and related electrical
wiring, then repair or replace.
4. After repair or replacement, recheck with the voltmeter
to confirm that the repair has corrected the problem.
Needle-nosed wire probe

MPI -TroubleshootingMPI -Troubleshooting13A-109
Engine-ECU Connector Terminal Arrangement
Terminal No.Check itemCheck condition (Engine condition)Normal condition
1No. 1 injectorWhile engine is idling after having warmed up,
suddenlydepresstheacceleratorpedal
From 11 - 14 V, momentarily
dropsslightly
14No. 2 injector
suddenlydepressthe accelerator pedal.drops slightly
2No. 3 injector
15No. 4 injector
3Fuel pressure control
solenoidvalve
Ignition switch: “ON”System voltage
solenoidvalve
Engine: Cranking→Idle operation
(within approximately 2 minutes or less)1 V or less→System voltage
4Stepper motor coil
<A1>Engine: Soon after the warmed up engine is
startedSystem voltage↔0-6V
(Changes repeatedly)
17Stepper motor coil
<A2>
5Stepper motor coil
<B1>
18Stepper motor coil
<B2>
6EGR control solenoid
valve
Ignition switch: “ON”System Voltage
valve
While engine is idling, suddenly depress the
accelerator pedal.From system voltage,
momentarily drops
8A/C relayDEngine: Idle operation
DA/Cswitch:OFF→ON(A/Ccompressor
System voltage or momen-
tarily6Vormore→1VorDA/Cswitch:OFF→ON(A/Ccompressor
runs)tarily6Vor more→1Vor
less
9Purge control sole-
noidvalve
Ignition switch: “ON”System voltage
noidvalve
Engine: Idle operation1 V or less
10Ignition coil - No.1,
No.4Engine speed: 3,000 r/min0.3 - 3.0 V
23Ignition coil - No.2,
No.3
11Waste gate solenoid
valve
Ignition switch: “ON”System voltage
valve
Engine: After warm-up, idle operation
(When using premium gasoline)1 V or less

MPI -Troubleshooting13A-110
Terminal No.Normal condition Check condition (Engine condition) Check item
12Power supplyIgnition switch: “ON”System voltage
25
19Air flow sensor reset
signal
Engine: Idle operation0-1V
signal
Engine speed: 3,000 r/min6-9V
21Fan controllerRadiator fan is not operating0 - 0.3 V
Radiator fan is operating0.7 V or more
22Fuel pump relay 2Ignition switch: “ON”System voltage
Engine: Idle operation1 V or less
24A/C load signalDEngine:
Idle operation
DA/C switch: ON
(A/C compressor
runs)DOutdoor air
sensor ambient
temperature:
18_C or more
DA/C setting
temperature:
Minimum
temperature
DA/C air volume:
Maximum1 V or less
DA/C setting
temperature:
indoor
temperature
DA/C air volume:
MinimumSystem voltage
32Condenser fan motor
relay (HI)Fan inactive state
(Engine coolant temperature: 90_C or less)System voltage
Fan high-speed rotation state
(Engine coolant temperature: 105_C or more)1 V or less
33Alternator G terminalDEngine: After warm-up, idle operation
DRadiator fan: Not operating
DHeadlamp: OFF→ON
DStop lamp: OFF→ON
DRear defogger switch: OFF→ONVoltage increases by
0.2 - 3.5 V
34Condenser fan motor
relay (LOW)Fan inactive state
(Engine coolant temperature: 90_C or less)System voltage
Fan low-speed rotation state (Engine coolant
temperature: 95 - 100_C or more)1 V or less
35Intercooler water
spraylamp
Ignition switch: “ON”System voltage
spraylamp
Ignition switch: “LOCK” (OFF)1 V or less
36Engine warning lampIgnition switch: “LOCK” (OFF)→“ON”1 V or less→System
voltage (After several se-
conds have elapsed)

MPI -Troubleshooting13A-111
Terminal No.Normal condition Check condition (Engine condition) Check item
37Power steering fluid
pressure switchEngine: Idling after
warming upWhen steering wheel
is stationarySystem voltage
When steering wheel
is turned1 V or less
38Engine control relayIgnition switch: “LOCK” (OFF)System voltage
Ignition switch: “ON”1 V or less
39Fuel pump relay 3While engine is idling, suddenly depress the
accelerator pedal.Temporarily rises slightly
from 1 V or less.
41Alternator FR
terminalDEngine: After warm-up, idle operation
DRadiator fan: Not operating
DHead lamp: OFF→ON
DStop lamp: OFF→ON
DRear deffogger switch: OFF→ONVoltage decrease
44Intercooler water
spray switch (Auto)DIgnition switch: “ON”
DIntercooler water spray switch: ON1 V or less
DIgnition switch: “ON”
DIntercooler water spray switch: OFFSystem voltage
45A/C switchEngine: Idle operationTurn the A/C switch
OFF0.5 V or less
DA/C switch: ON
DA/C setting
temperature
When room tem-
perature is 25_C
or more: Max
Cool
When room tem-
perature is 25_C
or less: Max. HotSystem voltage
53Secondary air control
solenoid valveIgnition switch: “ON”System voltage
54Oxygen sensor
heater(Rear)
Engine: Idling after warming up1 V or less
heater(Rear)
Engine speed: 5,000r/minSystem voltage
55Intercooler water
sprayrelay
Ignition switch: “ON”System voltage
spray relay
Ignition switch: “LOCK” (OFF)1 V or less
58Tachometer signalEngine speed: 3,000r/min0.3 - 3.0 V
60Oxygen sensor
heater(front)
Engine: Idling after warming up1 V or less
heater(front)
Engine speed: 5,000r/minSystem voltage
71Ignition switch - STEngine: Cranking8 V or more

MPI -Troubleshooting13A-112
Terminal No.Normal condition Check condition (Engine condition) Check item
72Intake air
temperature sensorIgnition switch: “ON”Intake air
temperature: - 20_C3.8 - 4.4 V
Intake air
temperature: 0_C3.2 - 3.8 V
Intake air
temperature: 20_C2.3 - 2.9 V
Intake air
temperature: 40_C1.5 - 2.1 V
Intake air
temperature: 60_C0.8 - 1.4 V
Intake air
temperature: 80_C0.4 - 1.0 V
75Oxygen sensor
(Rear)DTransmission: Second gear
DDriving with the throttle widely open
DEngine: 3,500 r/min or more0.6 - 1.0 V
76Oxygen sensor (front)Engine: Running at 2,500 r/min after warmed
up (Check using a digital type voltmeter)0↔0.8 V
(Changes repeatedly)
80Backup power supplyIgnition switch: “LOCK” (OFF)System voltage
81Sensor impressed
voltageIgnition switch: “ON”4.9 - 5.1 V
82Ignition switch - IGIgnition switch: “ON”System voltage
83Engine coolant
temperature sensorIgnition switch: “ON”Coolant temperature:
-20_C3.9 - 4.5 V
Coolant temperature:
0_C3.2 - 3.8 V
Coolant temperature:
20_C2.3 - 2.9 V
Coolant temperature:
40_C1.3 - 1.9 V
Coolant temperature:
60_C0.7 - 1.3 V
Coolant temperature:
80_C0.3 - 0.9 V
84Throttle position
sensorIgnition switch: “ON”Set throttle valve to
idle position0.535 - 0.735 V
Fully open throttle
valve4.5 - 5.0 V
85Barometric pressure
sensor
Ignition switch: “ON”Altitude: 0 m3.8 - 4.2 V
sensor
Altitude: 600 m3.5 - 3.9 V
Altitude: 1,200 m3.2 - 3.8 V
Altitude: 1,800 m3.0 - 3.4 V

MPI -Troubleshooting13A-113
Terminal No.Normal condition Check condition (Engine condition) Check item
86Vehicle speed sensorDIgnition switch: “ON”
DMove the vehicle slowly forward0↔5V
(Changes repeatedly)
88Camshaft position
sensor
Engine: Cranking0.4 - 3.0 V
sensor
Engine: Idle operation0.5 - 2.0 V
89Crank angle sensorEngine: Cranking0.4 - 4.0 V
Engine: Idle operation1.5 - 2.5 V
90Air flow sensorEngine: Idle operation2.2 - 3.2 V
Engine speed: 2,500 r/min
91Intercooler water
spray switch (Manual)DIgnition switch: “ON”
DIntercooler water spray switch: ON1 V or less
DIgnition switch: “ON”
DIntercooler water spray switch: OFFSystem voltage

MPI -Troubleshooting13A-114
CHECK CHART FOR RESISTANCE AND CONTINUITY
BETWEEN TERMINALS
1. Turn the ignition switch to “LOCK” (OFF) position.
2. Disconnect the engine-ECU connector.
3. Measure the resistance and check for continuity between
the terminals of the engine-ECU harness-side connector
while referring to the check chart.
NOTE
(1) When measuring resistance and checking continuity,
a harness for checking contact pin pressure should
be used instead of inserting a test probe.
(2) Checking need not be carried out in the order given
in the chart.
Caution
If the terminals that should be checked are mistaken,
or if connector terminals are not correctly shorted
to earth, damage may be caused to the vehicle wiring,
sensors, engine-ECU and/or ohmmeter.
Be careful to prevent this!
4. If the ohmmeter shows any deviation from the standard
value, check the corresponding sensor, actuator and
related electrical wiring, and then repair or replace.
5. After repair or replacement, recheck with the ohmmeter
to confirm that the repair or replacement has corrected
the problem.
Engine-ECU Harness Side Connector Terminal Arrangement
Terminal No.Inspection itemNormal condition (Check condition)
1-12No. 1 injector2-3Ω(at 20_C)
14 - 12No. 2 injector
2-12No. 3 injector
15 - 12No. 4 injector

MPI -Troubleshooting13A-117
Examples of Abnormal Wave Patterns
DExample 1
Cause of problem
Sensor interface malfunction
Wave pattern characteristics
Rectangular wave pattern is output even when the engine
is not started.
DExample 2
Cause of problem
Damaged rectifier or vortex generation column
Wave pattern characteristics
Unstable wave pattern with non-uniform frequency.
However, when an ignition leak occurs during acceleration,
the wave pattern will be distorted temporarily, even if the air
flow sensor is normal.
CAMSHAFT POSITION SENSOR AND CRANK ANGLE
SENSOR
Measurement Method
1. Disconnect the camshaft position sensor connector and
connect the special tool (test harness: MB991709) in
between. (All terminals should be connected.)
2. Connect the analyzer special patterns pickup to camshaft
position sensor terminal No. 2.
3. Disconnect the crank angle sensor connector and connect
the special tool (test harness: MD998478) in between.
4. Connect the analyzer special patterns pickup to crank
angle sensor terminal No. 2.
Alternate Method (Test harness not available)
1. Connect the analyzer special patterns pickup to
engine-ECU terminal No. 88. (When checking the
camshaft position sensor signal wave pattern.)
2. Connect the analyzer special patterns pickup to
engine-ECU terminal No. 89. (When checking the crank
angle sensor signal wave pattern.)
Crank angle
sensor connector
Camshaft position sensor
connectorAnalyzer
Special patterns
pick-up

MPI -Troubleshooting13A-121
IDLE SPEED CONTROL SERVO (STEPPER MOTOR)
Measurement Method
1. Disconnect the idle speed control servo connector, and
connect the special tool (test harness: MB991709) in
between.
2. Connect the analyzer special patterns pickup to the idle
speed control servo-side connector terminal No. 1,
terminal No. 3, terminal No. 4 and terminal No. 6
respectively.
Alternate Method (Test harness not available)
1. Connect the analyzer special patterns pickup to
engine-ECU terminal No. 4, connection terminal No. 5,
connection terminal No. 17, and connection terminal No.
18 respectively.
Standard Wave Pattern
Observation conditions
FunctionSpecial patterns
Pattern heightHigh
Pattern selectorDisplay
Engine conditionWhen the engine coolant temperature is 20_C or below, turn the ignition switch from “LOCK”
(OFF) position to “ON” position (without starting the engine).
While the engine is idling, turn the A/C switch to ON.
Immediately after starting the warm engine
Standard wave pattern
Stepper
motor
control
signal
wave
pattern(V)
30
20
10The wave pattern
appears for an
instant, but soon
disappears.Point B
Coil reverse electromotive
force (Approx. 3×10 V)Point A
Induced electromotive force
from the motor turning
Time
Special
patterns
pickupAnalyzer

MPI -Troubleshooting13A-123
IGNITION COIL AND POWER TRANSISTOR
DIgnition coil primary signal
Refer to GROUP 16 - Ignition system.
DPower transistor control signal
Measurement Method
1. Disconnect the ignition coil connector, and connect the
special tool (test harness: MB991658) in between. (All
terminals should be connected.)
2. Connect the analyzer special patterns pickup to terminal
No. 3 of each ignition coil connector in turn.
Alternate Method (Test harness not available)
1. Connect the analyzer special patterns pickup to
engine-ECU terminal No. 10 (No. 1 - No. 4), terminal
No. 23 (No. 2 - No. 3) respectively.
Standard Wave Pattern
Observation condition
FunctionSpecial patterns
Pattern heightLow
Pattern selectorDisplay
Engine r/minApproximately 1,200 r/min
Standard wave pattern
Crank angle
sensor output
wave pattern
Power transistor
control signal
wave pattern(V)
75_BTDC5_BTDCT: Revolution time corresponding to a crank angle of 180_
Compression top dead center
θ: Spark
advance
angleIgnition period
OFF ON
Dwell section
T1: Time computed by the engine-ECUTime θ T1T
6
4
2
0
4
2
0
Special
patterns
pickupAnalyzer