Mitsubishi Lancer Evolution 7. Manual — part 185
MPI -
Troubleshooting
13A-39
Code No. P0403 EGR control solenoid valve system
Probable cause
Inspection Range
D
The battery voltage is 10 V or more.
Evaluation Conditions
D
Solenoid coil’s surge voltage (battery voltage +2 V) is not detected when EGR
control solenoid valve is turned OFF from ON.
D
EGR control solenoid valve malfunction
D
EGR control solenoid valve circuit disconnection,
short-circuit, or connector contact defect
D
Engine-ECU malfunction
OK
To the next page
OK
Check the harness between the EGR
control solenoid valve and
engine-ECU.
D
Check for damage of the output
cable.
NG
Repair
OK
Check the following connector:
C-126
NG
Repair
OK
Check and repair the harness between
the EGR control solenoid valve and
engine-ECU.
D
Check for disconnection and
short-circuit of the output cable.
OK
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. 6 and
earth
OK: System voltage
NG
Check the following connectors:
B-14, C-126
NG
Repair
OK
Check and repair the harness between
the EGR control solenoid valve and
engine control relay.
D
Check for disconnection and
short-circuit of the power cable.
OK
Measure at the B-112 EGR 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
NG
Check the following connectors:
B-11X, B-14
NG
Repair
OK
Measure at the B-112 EGR control so-
lenoid 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)
NG
Replace the EGR control solenoid
valve.
NG
Check the following connector:
B-112
NG
Repair
MUT-II Actuator test
D
No.10: EGR control solenoid valve
OK: Operation sound is heard,
and there is vibration.
OK
Intermittent malfunction
(Refer to GROUP 00 - Points to Note
for Intermittent Malfunctions.)
MPI -
Troubleshooting
13A-40
NG
Replace the engine-ECU.
OK
MUT-II Actuator test
D
No. 10: EGR control solenoid valve
OK: Operation sound is heard,
and there is vibration.
OK
Intermittent malfunction
(Refer to GROUP 00 - Points to Note
for Intermittent Malfunctions.)
OK
Check the harness between the EGR
control solenoid valve and engine
control relay.
D
Check for damage of the power
cable.
NG
Repair
From the previous page
MPI -
Troubleshooting
13A-41
Code No. P0443 Purge control solenoid valve system
Probable cause
Range of check
D
Ignition switch: ON
D
Battery voltage is 10 V or more.
Set Conditions
D
The solenoid coil surge voltage (battery voltage +2 V) is not detected when the
purge control solenoid valve is turned from ON to OFF.
D
Malfunction of the purge control solenoid valve
D
Open or short circuit in the purge control solenoid
valve circuit or loose connector contact.
D
Malfunction of Engine-ECU
OK
To the next page
OK
Check the harness between the purge
control solenoid valve and
engine-ECU.
D
Check for damage of the output
cable.
NG
Repair
OK
Check the following connector:
C-126
NG
Repair
OK
Check and repair the harness between
the purge control solenoid valve and
engine-ECU.
D
Check for disconnection and
short-circuit of the output cable.
OK
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. 9 and
earth
OK: System voltage
NG
Check the following connector:
C-126
NG
Repair
OK
Check and repair the harness between
the purge control solenoid valve and
engine control relay.
D
Check for disconnection and
short-circuit of the power cable.
OK
Measure at the B-23 purge control
solenoid valve connector.
D
Disconnect the connector to
measure at the harness side.
D
Ignition switch: ON
D
Voltage between terminal No. 2 and
earth
OK: System voltage
NG
Check the following connector:
B-11X
OK
Measure at the B-23 purge control so-
lenoid valve connector.
D
Disconnect the connector to
measure at the solenoid valve side.
D
Resistance between terminal No. 1
and terminal No. 2
OK: 30 - 34 Ω (at 20_C)
NG
Replace the purge control solenoid
valve.
NG
Check the following connector:
B-23
NG
Repair
MUT-II Actuator test
D
No.08: Purge control solenoid
valve
OK: Operation sound is heard,
and there is vibration.
OK
Intermittent malfunction
(Refer to GROUP 00 - Points to Note
for Intermittent Malfunctions.)
MPI -
Troubleshooting
13A-42
NG
Replace the engine-ECU.
OK
MUT-II Actuator test
D
No. 08: Purge control solenoid
valve
OK: Operation sound is heard,
and there is vibration.
OK
Intermittent malfunction
(Refer to GROUP 00 - Points to Note
for Intermittent Malfunctions.)
OK
Check the harness between the purge
control solenoid valve and engine
control relay.
D
Check for damage of the power
cable.
NG
Repair
From the previous page
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