Mitsubishi FUEL User Manual

MPI <4G6> -
Troubleshooting
13A-22
NG
Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
OK
Check the trouble symptoms.
OK
Transient malfunction
(Refer to GROUP 00 - Points to
Note for Intermittent Malfunctions.)
OK
Check the following connector:
C-40 <M/T>, C-175 <A/T>
Repair
NG
OK
Check the harness wire between the
oxygen sensor (front) and the
engine-ECU <M/T> or
engine-A/T-ECU <A/T>, and repair if
necessary.
NG
Check the following connector:
C-40 <M/T>, C-175 <A/T>
NG
Repair
OK
Measure at engine-ECU connector
C-40 <M/T> or engine-A/T-ECU
connector C-175 <A/T>.
D
Measure the voltage at the
engine-ECU terminal.
D
Engine: 2,500 r/min (after
warming up)
D
Voltage between terminal 76
<M/T>, 71 <A/T> and earth
OK:
0 V and 0.8 V alternate.
OK
Check the harness wire between the
oxygen sensor (front) and the
engine-ECU <M/T> or
engine-A/T-ECU <A/T>, and repair if
necessary.
OK
NG
Repair
Check the following connector:
C-40 <M/T>, C-175 <A/T>
OK
Check the harness wire between the
oxygen sensor (front) and the
engine-ECU <M/T> or
engine-A/T-ECU <A/T>, and repair if
necessary.
Repair
(1) NG
Check the following connector:
C-40 <M/T>, C-176 <A/T>
NG
NG
Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
OK
Check the trouble symptoms.
OK
Check the harness wire between the
oxygen sensor (front) and the
engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
NG
Repair
Repair
OK
Measure at oxygen sensor (front)
connector C-46.
D
Disconnect the connector and
measure at the harness side.
D
Resistance between terminal 2
and earth
OK:
2
W
or less
NG
Check the following connector:
C-40 <M/T>, C-176 <A/T>
NG
Check the following connector:
C-46
NG
Repair
(2) NG
Check the oxygen sensor (front).
(Refer to P.13A-89.)
NG
Replace
OK
Measure at oxygen sensor (front)
connector C-46.
D
Measure the voltage at the
oxygen sensor (front) terminal.
D
Engine: 2,500 r/min (after
warming up)
(1) Voltage between terminal 2 and
earth
OK:
0.5 V or less
(2) Voltage between terminal 1 and
earth
OK:
0 V and 0.8 V alternate.

Mitsubishi FUEL Specifications

General

Brand	Mitsubishi
Model	FUEL
Category	Automobile Accessories
Language	English