Mitsubishi FUEL Manual page 36

13A-36
Code No. P0403 EGR control solenoid valve system
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.
MUT-II Actuator Test
10 EGR control solenoid valve
OK: Operating sound can be
heard and the valve vibrates.
NG
Measure at the EGR control solenoid
valve connector B-06.
D Disconnect the connector, and
measure at the solenoid valve
side.
D The resistance between terminals
1 and 2
OK: 28 - 36 W (at 20_C)
OK
Check the following connector:
B-06
OK
Measure at the EGR control solenoid
valve connector B-06.
D Disconnect the connector and
measure at the harness side.
D Ignition switch: ON
D The voltage between terminal 1
and earth
OK: System voltage
OK
Measure at engine-ECU connector
C-34 <M/T> or engine-A/T-ECU
connector C-177 <A/T>.
D Measure the voltage at the
engine-ECU terminal <M/T> or
engine-A/T-ECU terminal <A/T>.
D Ignition switch: ON
D The voltage between terminal 6
and earth
OK: System voltage
OK
Check the following connector:
C-34 <M/T>, C-177 <A/T>
OK
Check the harness wires between
the EGR control solenoid valve and
the engine control relay, and
between the EGR control solenoid
valve and the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
OK
Check the trouble symptoms.
NG
Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
MPI <4G6> -
Troubleshooting
OK
Intermittent malfunction
(Refer to GROUP 00 - Points to
Note for Intermittent Malfunctions.)
NG
Replace
NG
Repair
NG
Check the following connector:
C-31
Check the harness wire between the
EGR control solenoid valve and the
engine control relay, and repair if
necessary.
NG
Check the following connector:
C-34 <M/T>, C-177 <A/T>
Check the harness wire between the
EGR control solenoid valve and the
engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
NG
Repair
NG
Repair
Probable cause
D Malfunction of the EGR control solenoid valve
D Open or short circuit in the EGR control solenoid
valve circuit or loose connector contact
D Malfunction of engine-ECU <M/T>
D Malfunction of engine-A/T-ECU <A/T>
NG
NG
NG
OK
NG
OK
Repair
Repair
Repair