Mitsubishi Lancer Evolution X. Manual — part 388
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-617
STEP 5. Using scan tool MB991958, read the diagnostic
trouble code (DTC).
(1) Turn the ignition switch to the "ON" position.
(2) Read the DTC.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC P1603 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.
DTC P1676: Variant Coding
.
TECHNICAL DESCRIPTION
• The ECM performs proper engine control based
on vehicle information entered.
• A vehicle identification number (VIN) is entered at
a plant before shipment. This diagnosis code
occurs when no vehicle information is entered
during ECM replacement.
.
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
.
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-618
DTC SET CONDITIONS
Logic Flow Chart
Check Condition
• Ignition switch is "ON" position.
Judgment Criterion
• Vehicle information is not entered into the ECM.
.
FAIL-SAFE AND BACKUP FUNCTION
• None
.
OBD-II DRIVE CYCLE PATTERN
• None.
.
TROUBLESHOOTING HINTS (The most
likely causes for this code to be set are:)
• ECM failed.
DIAGNOSIS
Required Special Tools:
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: USB Cable
• MB991910: Main Harness A
End
Malfunction
No
No
Coding completed
DTC & MIL
previously set
Clear DTC & MIL
AK604358
Good
No
Start
Yes
Yes
Yes
Monitoring
conditions
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-619
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 DTC P1676 set?
YES : Replace the ECM with one into which vehicle
information is correctly entered.
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 P2066: Fuel Level Sensor (sub) Circuit Range/Performance
.
TECHNICAL DESCRIPTION
• The fuel level sensor converts the rest of the fuel
to a voltage and sends it to the combination
meter.
• The combination meter sends the data regarding
the rest of the fuel to the ECM.
• The ECM checks whether this data is within a
specified range.
.
DESCRIPTIONS OF MONITOR METHODS
Detect malfunction if change of fuel level sensor out-
put voltage is small when sum of fuel injection is
large.
.
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
.
AC608435
Data link connector
MB991827
MB991824
MB991910
AB
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-620
DTC SET CONDITIONS
Logic Flow Chart
.
Check Condition, Judgement Criterion
• When the fuel consumption calculated from the
operation time of the injector amounts to 30 litters
(7.9 gal), the diversity of the amount of fuel in
tank calculated from the fuel level sensor is 2 lit-
ters (0.5 gal) or less.
.
FAIL-SAFE AND BACKUP FUNCTION
• None
.
OBD-II DRIVE CYCLE PATTERN
None.
.
TROUBLESHOOTING HINTS (The most
likely causes for this code to be set are:)
• Fuel pump module or fuel level sensor (sub)
failed.
• ECM failed.
AK604341
Good
Malfunction
End
No
No
No
Indicated fuel level
change < 2L (0.5gal)
Reset fuel consumption accumulator
Start
Yes
Yes
Yes
Monitoring
conditions
Accumulate fuel consumption
through fuel injectors
Accumulated fuel consumption
will not reset when key-off/on.
Accumulated fuel >= specified
consumption value
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