Mitsubishi Lancer Evolution X. Manual — part 361
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-509
DTC SET CONDITIONS
Logic Flow Chart
.
Check Conditions
• Battery positive voltage is between 11 and 16.5
volts.
• 2 seconds or more have passed since the engine
staring sequence was completed.
Judgement Criterion
• Fuel level sensor resistance has continued to be
2 ohms or lower for 2 seconds.
.
FAIL-SAFE AND BACKUP FUNCTION
• None
.
OBD-II DRIVE CYCLE PATTERN
Refer to Diagnostic Function − OBD-II Drive Cycle −
.
.
TROUBLESHOOTING HINTS (The most
likely causes for this code to be set are:)
• Fuel level sensor failed.
• Combination meters assembly failed.
• Connector damage
• Harness damage
• 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
AK604342
Good
Malfunction
End
No
No
No
No
Fuel level sensor
resistance <= 2 ohms
Fuel level sensor
resistance >= 186 ohms
Start
Continuous
failure for 2secs
Monitoring
conditions
Yes
Yes
Yes
Yes
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-510
STEP 1. Using scan tool MB991958, read the combination
meter 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 combination meter DTC.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the combination meter DTC set?
YES : Refer to GROUP 54A, Chassis Electrical −
Combination Meter − Diagnosis Trouble Code Chart
NO : Go to Step 2.
STEP 2. Check the trouble symptoms.
(1) Carry out a test drive with the drive cycle pattern. Refer to
Diagnostic Function − OBD-II Drive Cycle − Pattern 23
(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0462 set?
YES : Replace the ECM. When the ECM is replaced,
register the ID code. Refer to GROUP 42B, ID Code
Registration Necessity Judgment Table <Vehicles
with KOS>
or GROUP 42C, ID Codes
Registration Judgment Table <Vehicles with WCM>
. Then go to Step 3.
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
.
STEP 3. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to
Diagnostic Function − OBD-II Drive Cycle − Pattern 23
(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0462 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.
AC608435
Data link connector
MB991827
MB991824
MB991910
AB
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-511
DTC P0463: Fuel Level Sensor Circuit High Input
.
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
An open circuit is detected while monitoring the fuel
level sensor output.
.
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
Logic Flow Chart
.
Check Conditions
• Battery positive voltage is between 11 and 16.5
volts.
• 2 seconds or more have passed since the engine
staring sequence was completed.
AK604342
Good
Malfunction
End
No
No
No
No
Fuel level sensor
resistance <= 2 ohms
Fuel level sensor
resistance >= 186 ohms
Start
Continuous
failure for 2secs
Monitoring
conditions
Yes
Yes
Yes
Yes
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-512
Judgement Criterion
• Fuel level sensor resistance has continued to be
186 ohms or higher for 2 seconds.
.
FAIL-SAFE AND BACKUP FUNCTION
• None
.
OBD-II DRIVE CYCLE PATTERN
Refer to Diagnostic Function − OBD-II Drive Cycle −
.
TROUBLESHOOTING HINTS (The most
likely causes for this code to be set are:)
• Fuel level sensor failed.
• Combination meters assembly failed.
• Connector damage
• Harness damage
• 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
STEP 1. Using scan tool MB991958, read the combination
meter 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 combination meter DTC.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the combination meter DTC set?
YES : Refer to GROUP 54A, Chassis Electrical −
Combination Meter − Diagnosis Trouble Code Chart
NO : Go to Step 2.
AC608435
Data link connector
MB991827
MB991824
MB991910
AB
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