Mitsubishi FUEL Manual page 208

13I-14
From the previous page
OK
Measure at air flow sensor connector
B-12.
D Use test harness (MB991709) to
connect the connector, and
measure at the pick-up harness.
D Ignition switch: ON
D Voltage between terminal 7 and
earth
OK: 7 - 8 V
OK
Measure at air flow sensor connector
B-12.
D Use test harness (MB991709) to
connect the connector, and
measure at the pick-up harness.
D Transmission: Neutral (A/T for P
range)
D Voltage between terminal 7 and
earth
OK: Engine: Idling
0 - 1 V
Engine speed: 3,000 r/min
6 - 9 V
OK
Measure the output waveform at air
flow sensor connector B-12 (by
using an analyzer).
D Use test harness (MB991709) to
connect the connector, and
measure at the pick-up harness.
D Engine: Idling
D Voltage between terminal 3 and
earth
OK: Waveforms should be dis-
played on P.13I-118 (In-
spection Procedure Using
an Analyzer) and noise
should not be displayed in
the waveform.
OK
Check the trouble symptoms.
NG
Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
GDI -
Troubleshooting
NG
Check the following connectors:
C-163 <M/T>, C-177 <A/T>
Check the harness between the air
flow sensor and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>.
Replace the air flow sensor.
NG
Check the following connectors:
C-163 <M/T>, C-177 <A/T>
Check the harness between the air
flow sensor and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>.
Check the trouble symptoms.
Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
NG
Replace the air flow sensor.
Check the trouble symptoms.
Check the following connectors:
C-164 <M/T>, C-176 <A/T>
Check the harnesses between the
air flow sensor and the engine-ECU
<M/T> or engine-A/T-ECU <A/T> and
between the air flow sensor and the
engine control relay, and repair if
necessary.
NG
OK
NG
OK
NG
OK
NG
OK
NG
NG
NG
OK
OK
Repair
Repair
Repair
Repair
Repair