Mitsubishi Galant 9G. Manual — part 1202
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-1108
AK303253
AK303253
CONNECTOR: C-208, C-210
AB
JUNCTION
BLOCK
C-210
C-208
FUEL PUMP
RELAY (1)
FUEL PUMP
RELAY (2)
AK303231
CONNECTOR: C-29
C-29
AB
AK303157
SERVICE
HOLE
AB
FUEL PUMP MODULE
(INCORPORATING FUEL
LEVEL SENSOR (MAIN)
AND FUEL TANK
TEMPERATURE SENSOR)
CONNECTOR: D-18
D-18 (GR)
AK303243
CONNECTOR: C-214
AB
JUNCTION
BLOCK
C-214
AK303147
CONNECTOR: B-19
PCM
AB
AIR CLEANER
B-19 (B)
AK303244
CONNECTOR: C-215
AB
JUNCTION
BLOCK
C-215
AK203191
CONNECTOR: C-308
C-308
AB
AK303227
CONNECTOR: C-211
C-211
AB
JUNCTION
BLOCK
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-1109
.
CIRCUIT OPERATION
• Battery positive voltage is applied to the fuel
pump relay 1 (terminal No. 3) from the ignition
switch-IG.
Ground is provided through terminal No. 2 to
chassis ground.
• When the ignition switch is turned to the "ON"
position, the battery positive voltage is applied to
the fuel pump relay 2 (terminal No. 1) from the
fuel pump relay 1 (terminal No. 1).
• Battery positive voltage is applied to the fuel
pump relay 2 (terminal No. 3) from the ignition
switch-IG.
• During cranking and while the engine is running,
the PCM turns the power transistor in the PCM
ON to ground the fuel pump relay 2 coil. With this,
the fuel pump relay turns ON, and the battery
positive voltage is supplied to the fuel pump from
the fuel pump relay 2 (terminal No. 4).
.
TROUBLESHOOTING HINTS (The most
likely causes for this code to be set are:)
• Malfunction of the fuel pump relay.
• Malfunction of the fuel pump.
• Improper connector contact, open or short-circu-
lated harness wire.
• Malfunction of the PCM.
AK203254
CONNECTOR: C-204
C-204
AB
JUNCTION
BLOCK
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-1110
DIAGNOSIS
Required Special Tools:
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: USB Cable
• MB991910: Main Harness A
STEP 1. Using scan tool MB991958, check actuator test
item 07: Fuel Pump.
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) Set scan tool MB991958 to the actuator test mode for item
07, Fuel Pump.
• An operation sound of the fuel pump should be heard.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the fuel pump operating properly?
YES : That this malfunction is intermittent. Refer to GROUP
00, How to Use Troubleshooting/Inspection Service
Points
− How to Cope with Intermittent Malfunctions
NO : Go to Step 2.
STEP 2. Check harness connector C-210 at fuel pump relay
1 and harness connector C-208 at fuel pump relay 2 for
damage.
Q: Is the harness connector in good condition?
YES : Go to Step 3.
NO : Repair or replace it. Refer to GROUP 00E, Harness
. Then confirm that the
malfunction symptom is eliminated.
AC305412
AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
AK303255
3
4
1
2
3
4
1
2
CONNECTOR: C-208, C-210
AB
JUNCTION
BLOCK
C-210
C-208
HARNESS
CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-1111
STEP 3. Check the fuel pump relay 1 and 2.
CAUTION
Because it is not possible to distinguish the top and the
bottom of the fuel pump relay, inspect it with the triangle
mark printed on the relay facing upward.
(1) Remove the fuel pump relay 1 and 2.
(2) Check for continuity between the each fuel pump relay
terminals No. 2 and No. 3.
• There should be continuity. (approximately 70 ohms)
(3) Use jumper wires to connect each fuel pump relay terminal
No. 3 to the positive battery terminal and terminal No. 2 to
the negative battery terminal.
(4) Check for continuity between the each fuel pump relay
terminals No. 1 and No. 4 while connecting and
disconnecting the jumper wire at the negative battery
terminal.
• Should be less than 2 ohms. (Negative battery terminal
connected)
• Should be open loop. (Negative battery terminal discon-
nected)
(5) Install the fuel pump relay 1 and 2.
Q: Is the measured resistance normal?
YES : Go to Step 4.
NO : Replace the fuel pump relay 1 and/or 2. Then confirm
that the malfunction symptom is eliminated.
AK303255
3
4
1
2
3
4
1
2
CONNECTOR: C-208, C-210
AB
JUNCTION
BLOCK
C-210
C-208
HARNESS
CONNECTOR:
COMPONENT SIDE
AK104052
2
3 4
1
FUEL PUMP
RELAY SIDE
CONNECTOR
AB
AK104053
1 2
3 4
AB
FUEL PUMP
RELAY SIDE
CONNECTOR
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст