Mitsubishi Galant 9G. Manual — part 898
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-1034
INSPECTION PROCEDURE 24: Purge Flow Test of the Evaporative Emission Canister Failure.
.
COMMENT
• The test fails when the purge line or purge port is
clogged or if the evaporative emission purge
solenoid fails.
.
TROUBLESHOOTING HINTS (The most
likely causes for this case:)
• Purge line or purge port is clogged.
• Malfunction of the evaporative emission purge
solenoid.
• Evaporative emission canister is clogged.
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, 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 the DTC set?
YES : Refer to Diagnostic Trouble Code Chart
NO : Refer to GROUP 17, Emission Control System
−
Purge Control System Check (Purge Flow Check)
AK303804AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-1035
INSPECTION PROCEDURE 25: Pressure Test of the Evaporative System Failure
.
COMMENT
• The test fails if there is a leak from the fuel tank or
vapor line.
.
TROUBLESHOOTING HINTS (The most
likely causes for this case:)
• Loose fuel tank filler tube cap.
• Broken seal in fuel tank, vapor line evaporative
emission canister.
DIAGNOSIS
STEP 1. Check the evaporative emission purge solenoid.
Refer to GROUP 17, Emission Control System
− Evaporative
.
Q: Is the evaporative emission purge solenoid normal?
YES : Go to Step 2.
NO : Repair or replace it. Then confirm that the malfunction
symptom is eliminated.
STEP 2. Check the evaporative emission ventilation
solenoid.
Refer to GROUP 17, Emission Control System
− Evaporative
Emission Ventilation Solenoid Check
Q: Is the evaporative emission ventilation solenoid
normal?
YES : Check the following items, and repair or replace the
defective items.
a. Check for leaks from the vapor line or
evaporative emission canister.
b. Check for leaks from the fuel tank.
Then confirm that the malfunction symptom is
eliminated.
NO : Repair or replace it. Then confirm that the malfunction
symptom is eliminated.
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-1036
INSPECTION PROCEDURE 26: Generator output voltage is low (approximately 12.3 volts).
.
CIRCUIT OPERATION
• The PCM controls generator out put current by
duty-controlling continuity between the generator
G terminal (terminal No. 1) and ground.
.
TROUBLESHOOTING HINTS (The most
likely causes for this charging system:)
• Malfunction of the charging system.
• Short circuit in harness between generator G ter-
minal and PCM.
• PCM failed.
4
3
2
1
121 122 123 124 125 126 127
128 129 130 131 132 133
134 135 136 137 138 139 140
141 142 143 144 145 146
147 148 149 150 151 152 153
AK303921
BLA
CK-RED
POWERTRAIN CONTROL
MODULE (PCM)
GENERATOR
VOLTAGE
REGULATOR
B-116
(MU802046)
1
132
B-23
Generator Circuit
AK303059
CONNECTOR: B-23
PCM
AB
AIR CLEANER
B-23
AK303883AB
CONNECTOR: B-116
B-116 (GR)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-1037
DIAGNOSIS
Required Special Tool:
• MB991923: Power Train ECU Check Harness
STEP 1. Measure the voltage at PCM connector B-23 by
using check harness special tool MB991923.
(1) Disconnect the all PCM connectors and connect check
harness special tool MB991923 between the separated
connectors.
(2) Start the engine and run at idle.
127 126 125 124 123 122 121
133 132 131 130 129 128
140 139 138 137 136 135 134
146 145 144 143 142 141
153 152 151 150 149 148 147
AK303058
HARNESS CONNECTOR:
COMPONENT SIDE
CONNECTOR: B-23
B-23
PCM
AB
AIR CLEANER
AK202954
127 126 125 124 123 122 121
133 132 131 130 129 128
140 139 138 137 136 135 134
146 145 144 143 142 141
153 152 151 150 149 148 147
AB
POWER PLANT ECU
CHECK HARNESS CONNECTOR
MB991923
PCM
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