Mitsubishi Lancer Evolution 7. Manual — part 187
MPI -
Troubleshooting
13A-47
Code No. P1104 Waste gate solenoid valve system
Probable cause
Inspection Range
D
Battery voltage is more than 10 V.
Evaluation Conditions
D
Solenoid coil’s surge voltage (battery voltage +2 V) is not detected when the
waste gate solenoid valve turned from ON to OFF.
D
Waste gate solenoid valve malfunction
D
Engine-ECU malfunction
OK
NG
Replace the engine-ECU.
OK
Intermittent malfunction (Refer to
GROUP 00 - Points to Note for
Intermittent Malfunctions.)
MUT-II Actuator Test
D
No. 12: Waste gate solenoid
valve
OK: Operation sound is heard,
and there is vibration.
OK
NG
Repair
OK
NG
Intermittent malfunction (Refer to
GROUP 00 - Points to Note for
Intermittent Malfunctions.)
OK
Check the following connector: B-36
MUT-II Actuator Test
D
No. 12: Waste gate solenoid valve
OK: Operation sound is heard,
and there is vibration.
NG
Repair
NG
NG
Repair
OK
Check the harness between the
waste gate solenoid valve and
engine-ECU.
D
Check for disconnection and
short-circuit of the output cable.
Check the following connector: C-39
OK
Check the following connector: C-126
Measure at the C-126 engine-ECU
connector.
D
Disconnect the connector to
measure at the harness side.
D
Ignition switch: ON
D
Voltage between terminal No. 11
and earth
OK: System voltage
NG
Replace the waste gate solenoid
valve.
Measure at the B-36 waste gate
solenoid valve connector.
D
Disconnect the connector to
measure at the solenoid valve
side.
D
Resistance between terminal No.
1 and terminal No. 2
OK: 29 - 35 Ω (at 20_C)
OK
NG
Measure at the B-36 waste gate
solenoid valve connector.
D
Disconnect the connector to
measure at the harness side.
D
Ignition switch: ON
D
Voltage between terminal No. 1
and earth
OK: System voltage
OK
NG
Repair
OK
OK
Check and repair the harness between
the waste gate solenoid valve and
engine control relay.
D
Check for disconnection and
short-circuit of the power cable.
Check the following connector:
B-11X
NG
Repair
Check the harness between the
waste gate solenoid valve and
engine control relay.
D
Check for damage of the power
cable.
NG
Repair
OK
Check the harness between the
waste gate solenoid valve and
engine-ECU.
D
Check for damage of the output
cable.
MPI -
Troubleshooting
13A-48
Code No. P1105 Fuel pressure control solenoid valve
system
Probable cause
Inspection Range
D
Battery voltage is more than 10 V.
Evaluation Conditions
D
Solenoid coil’s surge voltage (battery voltage +2 V) is not detected when the
fuel pressure control solenoid valve turned from ON to OFF.
D
Fuel pressure control solenoid valve malfunction
D
Engine-ECU malfunction
OK
NG
Replace the engine-ECU.
OK
Intermittent malfunction (Refer to
GROUP 00 - Points to Note for
Intermittent Malfunctions.)
MUT-II Actuator Test
D
No. 09: Fuel pressure control
solenoid valve
OK: Operation sound is heard,
and there is vibration.
OK
NG
Repair
OK
NG
Intermittent malfunction (Refer to
GROUP 00 - Points to Note for
Intermittent Malfunctions.)
OK
Check the following connector: B-37
MUT-II Actuator Test
D
No. 08: Purge control solenoid
valve
OK: Operation sound is heard,
and there is vibration.
NG
Repair
NG
NG
Repair
OK
OK
Check and repair the harness
between the fuel pressure control
solenoid valve and engine-ECU.
D
Check for disconnection and
short-circuit of the output cable.
Check the following connector:
C-126
OK
Check the following connector: C-126
Measure at the C-126 engine-ECU
connector.
D
Disconnect the connector to
measure at the harness side.
D
Ignition switch: ON
D
Voltage between terminal No. 3
and earth
OK: System voltage
NG
Replace the fuel pressure control
solenoid valve.
Measure at the B-37 fuel pressure
control solenoid valve connector.
D
Disconnect the connector to
measure at the solenoid valve
side.
D
Resistance between terminal No.
1 and terminal No. 2
OK: 29 - 35 Ω (at 20_C)
OK
NG
Measure at the B-37 fuel pressure
control solenoid valve connector.
D
Disconnect the connector to
measure at the harness side.
D
Ignition switch: ON
D
Voltage between terminal No. 1
and earth
OK: System voltage
OK
NG
Repair
OK
OK
Check and repair the harness between
the fuel pressure control solenoid valve
and engine control relay.
D
Check for disconnection and
short-circuit of the power cable.
Check the following connector:
B-11X
NG
Repair
Check the harness between the fuel
pressure control solenoid valve and
engine control relay.
D
Check for damage of the power
cable.
NG
Repair
OK
Check the harness between the fuel
pressure control solenoid valve and
engine-ECU.
D
Check for damage of the output
cable.
MPI -
Troubleshooting
13A-49
Code No. P1500 Alternator FR terminal system
Probable cause
Inspection Range
D
Engine speed: More than 50 r/min
Evaluation Conditions
D
The input voltage from the alternator FR terminal is between 4.8 V and 5.2 V
or is the battery voltage for 20 seconds.
D
Open circuit in the alternator FR terminal circuit
D
Malfunction of engine-ECU
OK
Intermittent Malfunction
(Refer to GROUP 00 - Points to
Note for Intermittent Malfunction.)
OK
Check the trouble symptoms.
NG
Replace the engine-ECU.
OK
Intermittent Malfunction
(Refer to GROUP 00 - Points to
Note for Intermittent Malfunction.)
OK
Check the trouble symptoms.
NG
Replace the alternator.
NG
OK
Check the harness between the middle
connector and engine-ECU.
D
Check for damage of the output
wire.
Repair
NG
OK
Check the harness between the
alternator and middle connector.
D
Check for damage of the output
wire.
Repair
OK
Measure at the B-14 middle
connector.
D
Using the test harness
(MB991658), connect the
connector and measure at the
pickup harness.
D
Engine: Idling (After warm-up)
D
Radiator fan: OFF
D
Voltage between terminal No. 5
and earth.
OK: The voltage drops when
the headlamp is turned
from OFF to ON.
NG
Check the following connector:
B-22
NG
Repair
OK
Replace the alternator.
NG
OK
Check the harness between the
alternator and middle connector.
D
Check for short circuit of the
output wire.
Repair
OK
Measure at the B-14 middle
connector.
D
Using the test harness
(MB991658), connect the
connector and measure at the
pickup harness.
D
Ignition switch: ON
D
Voltage between terminal No.5
and earth.
OK: 5 - 6 V
NG
Check the following connector:
B-22
NG
Repair
OK
Intermittent Malfunction
(Refer to GROUP 00 - Points to
Note for Intermittent Malfunction.)
OK
Check the trouble symptoms.
NG
Replace the engine-ECU.
NG
OK
Check the harness between the
middle connector and engine-ECU.
D
Check for short circuit of the
output wire.
Repair
OK
Measure at the B-14 middle
connector.
D
Disconnect the connector to
measure at the female connector
side.
D
Ignition switch: ON
D
Voltage between terminal No.5
and earth.
OK: 4.9 - 5.1 V
NG
Check the following connector:
C-122
NG
Repair
Check the following connector:
B-14
NG
Repair
MPI -
Troubleshooting
13A-50
Code No. P1603 Battery backup line malfunction
Probable cause
Inspection Range
D
Ignition switch: ON
Evaluation Conditions
D
The backup RAM information set at the last time when the ignition switch
was turned to the OFF position is not memorized.
D
Battery backup line disconnection, short circuit or
connector contact defect
D
Engine-ECU malfunction
NG
Replace the engine-ECU
OK
Check the trouble symptoms.
OK
Intermittent Malfunction (Refer to
GROUP 00 - Points to Note for
Intermittent Malfunction.)
OK
Check the following connector:
C-115
NG
Repair
OK
Check and repair the harness
between battery and engine-ECU.
D
Check for disconnection and
short-circuit of the power cable.
NG
Check the following connector:
C-129, C-05, C-135
NG
Repair
NO
MUT-II Self-Diag code
D
Diagnosis codes No. P1603 is
output.
End
NO
Measure at the C-115 engine-ECU
connector.
D
Disconnect the connector to
measure at the harness side.
D
Voltage between terminal No.80
and earth.
OK: System voltage
YES
Turn the ignition switch to the
“LOCK”(OFF) position and then in 10
seconds turn the ignition switch to the
“ON” position
Is the battery terminal disconnected
before reading the diagnostic trouble
code?
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