Mitsubishi Galant. Manual — part 87
MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-29
STEP 4. Check connector B-14 at the volume air flow
sensor for damage.
Q: Is the connector in good condition?
YES : Repair harness wire between MFI relay connector A-
21X terminal 1 and volume air flow sensor connector
B-14 terminal 4 because of harness damage.Then go
to Step 13.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection(
). Then go to Step 13.
STEP 5. Check connector B-14 at volume air flow sensor
for damage.
Q: Is the connector in good condition?
YES : Go to Step 6.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection(
). Then go to Step 13.
STEP 6. Check the sensor supply voltage at volume air
flow sensor harness side connector B-14.
(1) Disconnect the connector B-14 and measure at the harness
side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 3 and ground.
•
Voltage should be between 4.8 and 5.2 volts.
(4) Turn the ignition switch to the "LOCK"(OFF) position.
Q: Is the voltage normal?
YES : Go to Step 9.
NO : Go to Step 7.
STEP 7. Check connector C-40 at PCM for damage.
Q: Is the harness connector in good condition?
YES : Go to Step 8.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection(
). Then go to Step 13.
ACX02480
CONNECTOR : B-14
AC
VOLUME AIR
FLOW SENSOR
ACX02480
CONNECTOR : B-14
AC
VOLUME AIR
FLOW SENSOR
AKX01406 AC
B-14 HARNESS
SIDE CONNECTOR
7 6 5 4 3 2 1
AK000280
CONNECTOR : C-40
PCM
AV
MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-30
STEP 8. Check for short circuit to ground between volume
air flow sensor connector B-14 terminal 3 and PCM
connector C-40 terminal 65.
Q: Is the harness wire in good condition?
YES : Replace the PCM. Then go to Step 13.
NO : Repair it. Then go to Step 13.
STEP 9. Check the continuity at volume air flow sensor
harness side connector B-14.
(1) Disconnect the connector B-14 and measure at the harness
side.
(2) Check for the continuity between terminal 5 and ground.
•
Should be less than 2 ohm.
Q: Is the continuity normal?
YES : Go to Step 12.
NO : Go to Step 10.
STEP 10. Check connector C-40 at PCM for damage.
Q: Is the connector in good condition?
YES : Go to Step 11.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection(
). Then go to Step 13.
ACX02480
CONNECTOR : B-14
AC
VOLUME AIR
FLOW SENSOR
AK000280
CONNECTOR : C-40
PCM
AV
AKX01409AC
B-14 HARNESS
SIDE CONNECTOR
7 6 5 4 3 2 1
AK000280
CONNECTOR : C-40
PCM
AV
MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-31
STEP 11. Check for open circuit and harness damage
between volume air flow sensor connector B-14 terminal 5
and PCM connector C-40 terminal 57.
Q: Is the harness wire in good condition?
YES : Replace the PCM. Then go to Step 13.
NO : Repair it. Then go to Step 13.
STEP 12. Check connector C-40 at PCM for damage.
Q: Is the connector in good condition?
YES : Replace the volume air flow sensor. Then go to Step
13.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection(
). Then go to Step 13.
STEP 13. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to,
Procedure 6
−
Other Monitor(
(2) Check the diagnostic trouble code (DTC).
Q: Is the DTC P0101 is output?
YES : Retry the troubleshooting.
NO : The inspection is complete.
ACX02480
CONNECTOR : B-14
AC
VOLUME AIR
FLOW SENSOR
AK000280
CONNECTOR : C-40
PCM
AV
AK000280
CONNECTOR : C-40
PCM
AV
MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L>
13A-32
DTC P0102: Volume Air Flow Circuit Low Input
AK000459
1 2 3 4 5 6 7
42 43
48 49 50 51 52 53 54 55 56 57
46
45
44
58 59
60 61 62 63
64 65 66
2
3 4
5 6
7 8
9
11 12 13 14 15 16 17 18 19 20
30
21 22 23
24 25
26 27 28 29
3132 33
34 35
RED
RED
-
WHITE
RED
-
WHITE
47
1
41
10
RED
-
WHITE
3 4
1 2
GREEN-BL
UE
BL
ACK
WHITE-GREEN
B-14
MFI
RELAY
BATTERY
VOLUME AIR
FLOW SENSOR
5V
19
7
57
65
4
5
3
C-39
(MU803784)
C-40
(MU803781)
POWERTRAIN CONTROL
MODULE(PCM)
3
4
1
2
A-21X
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