Mitsubishi Galant (2004+). Manual — part 1222
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-581
STEP 5. Check the knock sensor.
(1) Disconnect the knock sensor connector B-120.
(2) Start the engine and run at idle.
(3) Measure the voltage between knock sensor side connector
terminal No. 1 (output) and No. 2 (ground).
(4) Gradually increase the engine speed.
• The voltage increases with the increase in the engine
speed.
(5) Turn the ignition switch to the "LOCK"(OFF) position.
Q: Is the sensor operating properly?
YES : Replace the PCM. Then go to Step 6.
NO : Replace the knock sensor. Then go to Step 6.
AK303120
1
2
KNOCK SENSOR
AB
CONNECTOR: B-120
B-120 (GR)
HARNESS
CONNECTOR:
COMPONENT SIDE
AK303857
1 2
AB
KNOCK SENSOR
CONNECTOR
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-582
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) Erase the DTC.
(4) Test drive under the following conditions:
• Engine speed: 3000 − 5000r/min
• Engine load: 40% or more
• Drive a minimum of 3 seconds after the above condi-
tions have been met.
(5) After completing the test drive, read the DTC.Turn the
ignition switch to the "LOCK" (OFF) position.
Q: Is DTC P0325 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-583
DTC P0335: Crankshaft Position Sensor Circuit
CAUTION
If DTC P0335 has been set, TCL related DTC
U1120 is also set. After P0335 has been diag-
nosed, don't forget to erase DTC U1120.
RED-
WHITE
RED-
WHITE
RED
AK302857
BR
O
W
N
GREEN-RED
MFI RELAY
BATTERY
103
113
1
2
4
B-17X
5V
POWERTRAIN
CONTROL
MODULE (PCM)
3
1 2
B-119
(MU802603)
3
2
1
3
CRANKSHAFT
POSITION
SENSOR
Crankshaft Position Sensor Circuit
B-22
RED-
WHITE
1
2
3
4
100
99
92
91
93 94 95
96 97 98
101 102 103 104
105 106 107 108
109 110 111 112 113
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-584
.
CIRCUIT OPERATION
• The crankshaft position sensor power is supplied
from the MFI relay (terminal No. 4).
• Terminal No. 1 of the crankshaft position sensor
is grounded with PCM (terminal No. 113).
• A 5-volt voltage is applied on the crankshaft posi-
tion sensor output terminal (terminal No. 2) from
the PCM (terminal No. 103). The crankshaft posi-
tion sensor generates a pulse signal when the
output terminal is opened and grounded.
.
TECHNICAL DESCRIPTION
• The crankshaft position sensor detects the crank
angle (position) of each cylinder, and converts
that data to pulse signals, then which are input to
the PCM.
• When the engine is running, the crankshaft posi-
tion sensor outputs a pulse signal.
• The PCM checks whether pulse signal is input
while the engine is cranking.
.
DESCRIPTIONS OF MONITOR METHODS
• Crankshaft position sensor signal does not
change.
• Crankshaft position sensor signal is not normal
pattern.
.
MONITOR EXECUTION
Continuous
.
AK303122
CRANKSHAFT
POSITION
SENSOR
AB
CRANKSHAFT
SPROCKET
CONNECTOR: B-119
B-119 (B)
AK303043
CONNECTOR: B-22
B-22 (B)
PCM
AB
AIR CLEANER
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
AK303014
CONNECTOR: B-17X
MFI RELAY
MFI RELAY
FRONT OF VEHICLE
B-17X
AB
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст