Mitsubishi Electric Lancer Evolution-VII Workshop Manual page 1176

Code No. P0403 EGR control solenoid valve system
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.
MUT-II Actuator test
D No.10: EGR control solenoid valve
OK: Operation sound is heard,
and there is vibration.
NG
Check the following connector:
B-112
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)
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
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
OK
Check the following connector:
C-126
OK
Check the harness between the EGR
control solenoid valve and
engine-ECU.
D Check for damage of the output
cable.
OK
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MPI -
Troubleshooting
OK
Intermittent malfunction
(Refer to GROUP 00 - Points to Note
for Intermittent Malfunctions.)
NG
Repair
NG
Replace the EGR control solenoid
valve.
NG
Check the following connectors:
B-11X, B-14
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.
NG
Check the following connectors:
B-14, C-126
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.
NG
Repair
NG
Repair
Probable cause
D EGR control solenoid valve malfunction
D EGR control solenoid valve circuit disconnection,
short-circuit, or connector contact defect
D Engine-ECU malfunction
NG
OK
NG
OK
13A-39
Repair
Repair