Mitsubishi Galant 9G. Manual — part 1040
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-460
STEP 11. Check for harness damage between fuel tank
temperature sensor connector D-18 (terminal No. 3) and
PCM connector B-20 (terminal No. 41).
NOTE: Check harness after checking intermediate connector
C-25. If intermediate connector is damaged, repair or replace it.
Refer to GROUP 00E, Harness Connector Inspection
.
Then go to Step 12.
Q: Is the harness wire in good condition?
YES : Replace the PCM. Then go to Step 12.
NO : Repair it. Then go to Step 12.
AK303840
1
2
3
4
5
SERVICE
HOLE
AB
CONNECTOR: D-18
D-18 (GR)
HARNESS
CONNECTOR:
COMPONENT SIDE
AK303092
25
21
24 23 22
29 28 27 26
34 33 32 31 30
38 37 36 35
43 42 41 40 39
CONNECTOR: B-20
B-20
PCM
AB
HARNESS CONNECTOR:
COMPONENT SIDE
AIR CLEANER
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-461
STEP 12. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to
Diagnostic Function
− OBD-II Drive Cycle − Procedure 6 −
(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0181 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-462
DTC P0182: Fuel Tank Temperature Sensor Circuit Low Input
1
2 3
4
5
22
21
23 24 25
26 27 28 29
30 31 32 33 34
35 36 37 38
39 40 41 42 43
AK400883
POWERTRAIN CONTROL
MODULE (PCM)
Fuel Tank Temperature Sensor Circuit
7
3
2
1
BLA
C
K
D-18
(MU802058)
41
FUEL TANK TEMPERATURE SENSOR
(INTEGRATED IN FUEL PUMP MODULE)
C-25
5 V
GRA
Y
-
GREEN
GRA
Y
-
GREEN
B-20
1 2
3 4
6
5
7 8
15 16
14
13
11 12
10
9
FROM PCM
AK303085
CONNECTOR: B-20
PCM
AB
AIR CLEANER
B-20
AK303086
CONNECTOR: C-25
C-25
AB
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-463
.
CIRCUIT OPERATION
• 5-volt voltage is applied to the fuel tank tempera-
ture sensor output terminal (terminal No. 3) from
the PCM (terminal No. 41) via the resistor in the
PCM.
• The fuel tank temperature sensor output voltage
increases when the resistance increases and
decreases when the resistance decreases. The
ground terminal (terminal No. 1) is grounded to
the vehicle body.
.
TECHNICAL DESCRIPTION
• The fuel tank temperature sensor converts the
fuel tank temperature to a voltage.
• The PCM detects the fuel tank temperature with
this output voltage.
.
DESCRIPTIONS OF MONITOR METHODS
Fuel tank temperature sensor output voltage is out of
specified range.
.
MONITOR EXECUTION
Continuous
.
MONITOR EXECUTION CONDITIONS
(Other monitor and Sensor)
Other Monitor (There is no temporary DTC stored
in memory for the item monitored below)
• Not applicable
Sensor (The sensor below is determined to be
normal)
• Engine coolant temperature sensor
• Intake air temperature sensor
.
AK303839AB
CONNECTOR: D-18
SERVICE
HOLE
FUEL TANK TEMPERATURE SENSOR
(INTEGRATED IN FUEL PUMP MODULE)
D-18 (GR)
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