Mitsubishi Galant 9G. Manual — part 1143
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-872
STEP 6. Check for harness damage between power
steering pressure switch connector B-31 (terminal No. 1)
and PCM connector B-21 (terminal No. 78).
Q: Is the harness wire in good condition?
YES : Replace the PCM. Then go to Step 7.
NO : Repair it. Then go to Step 7.
AK303162
1
AB
POWER STEERING
PRESSURE SWITCH
B-31 (B)
CONNECTOR: B-31
HARNESS
CONNECTOR:
COMPONENT SIDE
AK303018
55
56
54 53 52 51
57
62 61 60 59 58
63
69 68 67 66 65 64
70
75 74 73 72 71
76
82 81 80 79 78 77
83
CONNECTOR: B-21
PCM
AB
HARNESS CONNECTOR:
COMPONENT SIDE
AIR CLEANER
B-21 (B)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-873
STEP 7. Using scan tool MB991958, check data list item 27:
Power Steering Pressure Switch.
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) Start the engine and run at idle.
(3) Set scan tool MB991958 to the data reading mode for item
27, Power Steering Pressure Switch.
• If the steering wheel is not turned while idling, "OFF" will
be displayed.
• If the steering wheel is turned while idling, "ON" will be
displayed.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the switch operating properly?
YES : The inspection is complete.
NO : Retry the troubleshooting.
DTC P0603: EEP ROM Malfunction
.
TECHNICAL DESCRIPTION
• PCM stored the information such as the idle
learned value and so on in the memory of PCM.
.
DESCRIPTIONS OF MONITOR METHODS
To check whether the information such as the idle
learned value and so on is stored in the memory
of PCM.
.
MONITOR EXECUTION
Once per driving cycle
.
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)
• Not applicable
.
AC305412
AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-874
DTC SET CONDITIONS
Logic Flow Chart
Check Conditions
• Ignition switch is in "ON" position.
Judgement Criteria
• The latest data that was flashed while the ignition
switch was in "LOCK" (OFF) position are not
stored correctly.
.
OBD-II DRIVE CYCLE PATTERN
None.
.
TROUBLESHOOTING HINTS (The most
likely causes for this code to be set are:)
• PCM failed.
DIAGNOSIS
Required Special Tools:
• MB991958: Scan tool (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: USB Cable
• MB991910: Main Harness A
START
END
NO
NO
YES
YES
YES
NO
MALFUNCTION
GOOD
SPECIFIED
TIMES MONOTORED
COMUNICATION STATUS
FAILS
MONITORING
CONDITIONS
AK401535
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-875
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) After the DTC has been deleted, read the DTC again.
(4) Turn the ignition switch to the "LOCK"(OFF) position.
Q: Is DTC P0603 set?
YES : Replace the PCM.
NO : It can be assumed that this malfunction is intermittent.
Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points
− How to
Cope with Intermittent Malfunctions
.
DTC P0606: Powertrain Control Module Main Processor Malfunction
.
TECHNICAL DESCRIPTION
• Throttle actuator control module processor
checks the PCM for abnormal conditions.
.
DESCRIPTIONS OF MONITOR METHODS
No watch dog pulse is detected.
.
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)
• Not applicable
.
DTC SET CONDITIONS
Check Conditions
• Ignition switch is "ON" position.
Judgement Criteria
• No surveillance pulse signals should be input for
0.5 second.
.
OBD-II DRIVE CYCLE PATTERN
None.
.
TROUBLESHOOTING HINTS (The most
likely causes for this code to be set are:)
• PCM failed.
AK303804AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
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