2007 MITSUBISHI LANCER EVOLUTION check engine

MPI -Troubleshooting13A-88
NGRepair
NG
Repair NG
From the previous page
OK
OK
Replace the engine-ECU.
NG
MUT-IIActuator Test
DNo. 21: Fan controller
DIgnition switch: ON
OK:Radiator fan motor rotates.
NG
Check the radiator fan motor drive.
DDisconnect the C-126
engine-ECU connector.
DIgnition switch: ON
OK:Radiator fan motor rotates
at a high speed.OK
OK
Check the harness between the
battery and radiator fan control relay.
DCheck for damage of the power
cable.RepairMeasure at the C-126 engine-ECU
connector.
DDisconnect the connector to
measure at the harness side.
DIgnition switch: ON
DVoltage between terminal No. 21
and earth
OK:4.9 - 5.1 VOK
OK
Check the harness between the
radiator fan control relay and fan
controller.
DCheck for damage of the output
cable.
Replace the radiator fan motor and
fan controller assembly.NG
NG
OK
Check the following connector:
C-136 ,
A-13
OK
Replace the radiator fan motor and
fan controller assembly.
Check the harness between the fan
controller and engine-ECU.
DCheck for short-circuit of the
output cable.Repair NG
OK
Check the following connector:C-126
Repair
Intermittent malfunction (Refer to
GROUP 00 - Points to Note for
Intermittent Malfunctions.)

MPI -Troubleshooting13A-89
Inspection Procedure 25
Condenser fan relay system
Probable cause
The condenser fan relay turns ON with the signal from the engine-ECU, and
power is supplied to the condenser fan motor.DCondenser fan relay (HI) malfunction
DCondenser fan relay (LOW) malfunction
DCondenser fan motor malfunction
DCondenser fan circuit disconnection, short-circuit,
or connector contact defect
DEngine-ECU malfunction
OK
Check and repair the harness
between the condenser fan relay
(LOW) and engine-ECU.
DCheck for disconnection and
damage of the power cable.
(2) NG
OK
OK
Check the condenser fan motor.
(Refer to GROUP 14 - Engine
Cooling.)
OK
NG
OK
Check the following connector:
A-06X
OK
MUT-IIActuator Test
DNo. 38: Condenser fan (LOW)
DIgnition switch: ON
OK:Condenser fan motor ro-
tates (low speed).NG
OK
Measure at the C-122 engine-ECU
connector.
DMeasure the engine-ECU terminal
voltage.
DIgnition switch: ON
DVoltage between terminal No. 34
and earth
(Ignition switch: ON)
OK:System voltageRepair
NG
To the next page
NGReplace the condenser fan relay
(LOW).
OK
Check the condenser fan relay
(LOW). (Refer to GROUP 14 -
On-vehicle service.)
(1) NGMeasure at the A-06X condenser fan
relay (LOW) connector.
DRemove the relay, and measure
at the connector side.
(1) Voltage between terminal No. 2
and earth
(Ignition switch: ON)
OK:System voltage
(2) Voltage between terminal No. 4
and earth
OK:System voltage
NG
Repair OK
OK
Check the following connectors:
C-135, C-102, C-209, C-210
Check and repair the harness
between the condenser fan relay
(LOW) and ignition switch.
DCheck for disconnection and
damage of the power cable.
Check the following connectors:
C-122, C-136 ,
A-43
Check the following connector:
C-201
NG
Check the ignition switch. (Refer to
GROUP 54 - Ignition switch.)
Replace the ignition switch.
Check and replace the harness
between the battery and condenser
fan relay (LOW).
DCheck for disconnection and
damage of the power cable.

MPI -Troubleshooting13A-90
(2) NG
OK
OK
OK
NG
OK
Check the following connector:
A-07X
OK
MUT-IIActuator Test
DNo. 37: Condenser fan (HI)
DIgnition switch: ON
OK:Condenser fan motor ro-
tates (high speed).NG
Repair
NGReplace the condenser fan relay
(HI).
OK
Check the condenser fan relay (HI).
(Refer to GROUP 14 - On-vehicle
service.)
(1) NGMeasure at the A-07X condenser fan
relay (HI) connector.
DRemove the relay, and measure
at the connector side.
(1) Voltage between terminal No. 2
and earth
(Ignition switch: ON)
OK:System voltage
(2) Voltage between terminal No. 4
and earth
OK:System voltage
NG
Repair OK
OK
Check the following connectors:
C-135, C-102, C-209, C-210
Check and repair the harness
between the condenser fan relay
(HI) and ignition switch.
DCheck for disconnection and
damage of the power cable.
Check the following connector:
C-201
NG
Check the ignition switch. (Refer to
GROUP 54 - Ignition switch.)
Replace the ignition switch.
Check and replace the harness
between the battery and condenser
fan relay (HI).
DCheck for disconnection and
damage of the power cable.
NGCheck the following connector:A-45
OK
Replace the engine-ECU.
OK
To the next page
NG
OK
Check the harness between the
condenser fan relay (LOW) and
engine-ECU.
DCheck for damage of the power
cable.Repair Repair
NGOK
Measure at the A-45 condenser fan
motor connector.
DDisconnect the connector to
measure at the harness side.
DDisconnect the C-122
engine-ECU connector, and earth
the terminal No. 34.
DIgnition switch: ON
DVoltage between terminal No. 2
and earth
OK:System voltageCheck and repair the harness
between the condenser fan relay
(LOW) and engine-ECU.
DCheck for disconnection of the
power cable.
From the previous page

MPI -Troubleshooting13A-91
OKOK
From the previous page
NGCheck the following connector:A-45
OK
Replace the engine-ECU.
OKNG
OK
Check the harness between the
condenser fan relay (HI) and
engine-ECU.
DCheck for damage of the power
cable.Repair Repair
OK
Check and repair the harness
between the condenser fan relay
(HI) and engine-ECU.
DCheck for disconnection and
damage of the power cable.
NG
OK
Measure at the C-122 engine-ECU
connector.
DMeasure the engine-ECU terminal
voltage.
DIgnition switch: ON
DVoltage between terminal No. 32
and earth
(Ignition switch: ON)
OK:System voltage
Measure at the A-45 condenser fan
motor connector.
DDisconnect the connector to
measure at the harness side.
DDisconnect the C-122
engine-ECU connector, and earth
the terminal No. 32.
DIgnition switch: ON
DVoltage between terminal No. 1
and earth
OK:System voltageNG
Check the following connectors:
C-122, C-136 ,
A-43
Check and repair the harness
between the condenser fan relay
(HI) and engine-ECU.
DCheck for disconnection of the
power cable.
Replace the engine-ECU.

MPI -Troubleshooting13A-92
Inspection Procedure 26
A/C switch system
Probable cause
When the A/C switch on the control panel is turned ON, the A/C switch ON
signal is input to the engine-ECU. After receiving this signal, the engine-ECU
turns the A/C compressor ON.DControl panel A/C switch malfunction
DA/C system malfunction
DEngine-ECU malfunction
NG
Replace the engine-ECU.
Check the A/C system. (Refer to
GROUP 55 - Troubleshooting.)NG
OK
Intermittent malfunction (Refer to
GROUP 00 - Points to Note for
Intermittent Malfunctions.)MUT-IIData list
DNo. 28: A/C switch
DEngine: Idling
DA/C setting temperature
When room temperature is 25_
or more: Max Cool
When room temperature is 25_
or less: Max. Hot
DA/C switch: ON
OK:ON
DA/C switch: OFF
OK:OFFOK NG
OK
Check the following connector:C-122
Repair
Measure at the C-122 engine-ECU
connector.
DMeasure the engine-ECU terminal
voltage.
DEngine: Idling
DA/C setting temperature
When room temperature is 25_
or more: Max Cool
When room temperature is 25_
or less: Max Hot
DVoltage between terminal No. 45
and earth
DA/C switch: ON
(A/C compressor driven state)
OK:System voltage
DA/C switch: OFF
OK:0.5 V or less

MPI -Troubleshooting13A-93
Inspection Procedure 27
A/C compressor relay system
Probable cause
When the A/C switch ON signal is input to the engine-ECU, the engine-ECU
turns the A/C compressor relay ON.
The A/C compressor magnetic clutch starts with this.DA/C compressor relay malfunction
DA/C compressor magnetic clutch malfunction
DEngine-ECU malfunction
OK
(2) NGCheck the following connector:
C-136 , A-43
NG
Check and repair the harness
between the battery and A/C
compressor relay.
DCheck for disconnection and
short-circuit of the power cable.
OK
Check the A/C compressor relay. (Refer to 55 - On-vehicle
service.)NGReplace the A/C compressor relay.
Check the following connector:B-12XNG
Repair
OK
OK
Measure at the B-12X A/C
compressor relay connector.
DRemove the relay, and measure
at the connector side.
(1) Voltage between terminal No. 2
and earth
(Ignition switch: ON)
OK:System voltage
(2) Voltage between terminal No. 1
and earth
OK:System voltage(1) NGCheck the following connectors:
C-128 , C-130
, C-102, C-209,
C-210, C-201NG
OK
Check and repair the harness
between the ignition switch and A/C
compressor relay.
DCheck for disconnection and
short-circuit of the power cable.Repair
OKNG
Measure at the A-47 A/C
compressor connector.
DMeasure the engine-ECU terminal
voltage.
DRemove the B-12X A/C
compressor relay, and
short-circuit between the harness
connector’s terminal No. 1 and
terminal No. 4.
DIgnition switch: ON
DVoltage between terminal No. 1
and earth
OK:System voltage
To the next pageRepair
NG
OK
Check the following connector:A-47
Repair
OK
Check the following connector:
C-136 , A-43
NG
Check and repair the harness
between the A/C compressor relay
and A/C compressor.
DCheck for disconnection and
short - circuit of the output cable.Repair

MPI -Troubleshooting13A-94
OK
OK
Check the harness between the battery and A/C compressor
relay.
DCheck for damage of the power cable.NG
Repair
OK
Check the following connector:C-136 ,
A-43 NG
Repair
NG
Replace the engine-ECU.
NG
Repair
OK
OKMUT-IIData list
DNo. 49: A/C relay
DEngine: Idling
DA/C setting temperature
When room temperature is 25_
or more: Max Cool
When room temperature is 25_
or less: Max Hot
DA/C switch: ON
OK:ON
DA/C switch: OFF
OK:OFF
OK
OK
Measure at the C-126 engine-ECU
connector.
DMeasure the engine-ECU terminal
voltage.
DIgnition switch: ON
DVoltage between terminal No. 8
and earth
OK:System voltageNGCheck the following connector:C-126NG
OK
Check the harness between the A/C
compressor relay and engine-ECU.
DCheck for disconnection and
damage of the earth cable.Repair
OK
Check the harness between the ignition switch and A/C
compressor relay.
DCheck for damage of the power cable.NG
Check the following connectors:C-128 ,
C-130 , C-102, C-209, C-210, C-201Repair
From the previous page
Intermittent malfunction (Refer to
GROUP 00 - Points to Note for
Intermittent Malfunctions.)
Repair NG
OK
Check the harness between the A/C compressor relay and
engine-ECU.
DCheck for damage of the earth cable.NG
Repair
OK
Check the harness between the A/C compressor relay and
A/C compressor.
DCheck for damage of the output cable.NG
Repair
Replace the A/C compressor magnetic clutch.

MPI -Troubleshooting13A-95
Inspection Procedure 28
A/C load signal system
Probable cause
The size of the A/C compressor load is detected according to the difference in
set temperature. When the A/C large load signal is input to the engine-ECU, the
engine-ECU judges that the A/C compressor load is large, and controls the
throttle valve control servo so that the idling speed increases.DA/C-ECU malfunction
DEngine-ECU malfunction
OK
NG
OK
NG
Check the trouble symptoms.NG
Check the following connector:C-126Repair
OK
Check the following connector:C-126
Replace the engine - ECU.
Measure at the C-126 engine-ECU
connector.
DMeasure the engine-ECU terminal
voltage.
DEngine: Idling
DA/C switch: ON
(A/C compressor driven state)
DVoltage between terminal No. 24
and earth
DA/C setting temperature: Minimum
temperature
Air volume: Maximum
Outdoor air sensor ambient
temperature: 18_C or more
OK:1 V or less
DA/C setting temperature: indoor
temperature
Air volume: Minimum
OK:System voltage
NG
Repair
NGNG
Repair
OK
OK
Check the harness between the
engine-ECU and A/C-ECU.
DCheck for short-circuit of the
output cable.NG
Repair
Check the A/C system.
(Refer to GROUP 55 -
Troubleshooting.)OK
Intermittent malfunction (Refer to
GROUP 00 - Points to Note for
Intermittent Malfunctions.)
Check the following connectors:
C-16 ,
C-18 , C-20
NG
Repair OK
OK
Check and repair the harness
between the engine-ECU and
A/C-ECU.
DCheck for disconnection of the
output cable.
Check the following connectors:
C-32 ,
C-30 , C-128 drive vehicles>, C-130 vehicles>
Measure at the C-32 A/C-ECU
connector or C-30
A/C-ECU connector A/C>.
DMeasure the A/C-ECU terminal
voltage.
DEngine: Idling
DA/C setting temperature: Minimum
temperature
When room temperature is 25_
or more: Max Cool
When room temperature is 25_
or less: Max. Hot
DA/C switch: ON
DVoltage between terminal No. 2
and earth drive vehicles)>
DVoltage between terminal No. 5
and earth drive vehicles)>
DVoltage between terminal No. 32
and earth
OK:System voltage