Mitsubishi Galant (2004+). Manual — part 1290
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-853
(2) Measure the voltage between terminal No. 42 and ground.
• Voltage should be battery positive voltage.
Q: Is battery positive voltage (approximately 12 volts)
present?
YES : Go to Step 5.
NO : Go to Step 3.
STEP 3. Measure the backup power supply voltage at PCM
harness side connector B-20.
(1) Disconnect the PCM connector B-20 and measure at the
harness side.
(2) Measure the voltage between terminal No. 42 and ground.
• Voltage should be battery positive voltage.
Q: Is battery positive voltage (approximately 12 volts)
present?
YES : Go to Step 4.
NO : Repair harness wire between battery and PCM
connector B-20 (terminal No. 42) because of open
circuit or short circuit to ground. Then go to Step 6.
25
21
24 23 22
29 28 27 26
34 33 32 31 30
38 37 36 35
43 42 41 40 39
AK203003AB
POWER PLANT ECU
CHECK HARNESS
CONNECTOR
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
25
21
24 23 22
29 28 27 26
34 33 32 31 30
38 37 36 35
43 42 41 40 39
AK303187
B-20 HARNESS
CONNECTOR:
COMPONENT SIDE
AB
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-854
STEP 4. Check harness connector B-20 at PCM for
damage.
Q: Is the harness connector in good condition?
YES : Repair harness wire between battery and PCM
connector B-20 (terminal No. 42) because of harness
damage. Then go to Step 6.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 6.
STEP 5. Check harness connector B-20 at PCM for
damage.
Q: Is the harness connector in good condition?
YES : Replace the PCM. Then go to Step 6.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 6.
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
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-855
STEP 6. Using scan tool MB991958, read the diagnostic
trouble code (DTC).
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Read the DTC.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC P1603 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.
AC305412
AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-856
DTC P2066: Fuel Level Sensor (sub) Circuit Range/Performance
Fuel Level Sensor Circuit
AK302865
FUEL LEVEL
SENSOR (SUB)
FUEL LEVEL SENSOR (MAIN)
(INTEGRATED IN FUEL PUMP MODULE)
13
2
1
2
1
11
PINK-
BLA
CK
BLA
CK
PINK-
BLACK
PINK-
BLA
CK
PINK-
BLA
CK
24
GRA
Y
GRA
Y
POWERTRAIN
CONTROL
MODULE (PCM)
C-28
D-18
(MU802058)
D-17
(MU802004)
CONBINATION METER
1
2 3
4
5
B-20
22
21
23 24 25
26 27 28 29
30 31 32 33 34
35 36 37 38
39 40 41 42 43
C-25
1
2
AK303156
CONNECTOR: D-17
AB
SERVICE
HOLE
FUEL LEVEL
SENSOR (SUB)
D-17
AK303157
SERVICE
HOLE
AB
FUEL PUMP MODULE
(INCORPORATING FUEL
LEVEL SENSOR (MAIN)
AND FUEL TANK
TEMPERATURE SENSOR)
CONNECTOR: D-18
D-18 (GR)
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