Mitsubishi FUEL User Manual

MPI <4G6> -
Troubleshooting
13A-10
INSPECTION PROCEDURE CLASSIFIED BY DIAGNOSIS CODE
Code No. P0100 Air flow sensor system Probable cause
Range of Check
D
Engine speed: 500 r/min or more
Set Conditions
D
The sensor output frequency is 3.3 Hz or less for four seconds.
D
Malfunction of air flow sensor
D
Open or short circuit in air flow sensor circuit or
loose connector contact
D
Malfunction of engine-ECU <M/T>
D
Malfunction of 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>.
OK
Check the harness between the air
flow sensor and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>.
NG
Repair
(3) NG
Check the following connectors:
C-40 <M/T>, C-176 <A/T>
NG
Repair
OK
To the next page
OK
Check the harness between the air
flow sensor and the engine control
relay, and repair if necessary.
(2) NG
Check the following connector:
C-31
NG
Repair
OK
Check the trouble symptoms.
NG
Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
OK
Check the harness between the air
flow sensor and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>.
NG
Repair
NG
Check the following connector:
C-40 <M/T>, C-176 <A/T>
NG
Repair
OK
Check the harness between the air
flow sensor and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>,
and repair if necessary.
NG
Repair
OK
Check the following connector:
C-40 <M/T>, C-176 <A/T>
(1) NG
Measure at engine-ECU connector
C-40 <M/T> or engine-A/T-ECU
connector C-176 <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
Voltage between terminal 90
<M/T>, 65 <A/T> and earth
OK:
4.8 - 5.2 V
OK
Measure at air flow sensor connector
B-12.
D
Disconnect the connector and
measure at the harness side.
(1) Voltage between terminal 3 and
earth (Ignition switch: ON)
OK:
4.8 - 5.2 V
(2) Voltage between terminal 4 and
earth (Ignition switch: ON)
OK:
System voltage
(3) Resistance between terminal 5
and earth
OK:
2
W
or less
NG
Check the following connector:
B-12
NG
Repair
MUT-
II
Data list
12 Air flow sensor (Refer to
P.13A-75, DATA LIST
REFERENCE TABLE.)
OK
Transient malfunction
(Refer to GROUP 00 - Points to
Note for Intermittent Malfunctions.)

Mitsubishi FUEL Specifications

General

Brand	Mitsubishi
Model	FUEL
Category	Automobile Accessories
Language	English