Mitsubishi Galant (2004+). Manual — part 1316
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-957
OBD-II DRIVE CYCLE PATTERN
None.
.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are:)
• CAN line harness damage or connector damage.
• Combination meter failed.
• PCM failed.
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, diagnose CAN bus
line.
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) Diagnose CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the CAN bus line normal?
YES : Go to Step 2.
NO : Repair the CAN bus line. Refer to GROUP 54C, Can
Bus Diagnostics Table
. Then go to Step 6.
AC305412
AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-958
STEP 2. Using scan tool MB991958, read the diagnostic
trouble code (DTC).
(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-Diagnostic
Trouble Code Chart
NO : Go to Step 3.
STEP 3. Using scan tool MB991958, read the diagnostic
trouble code (DTC).
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Read the combination ETACS-DTC.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC 013 set?
YES : Go to Step 4.
NO : Go to Step 5.
AC305412
AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
AC305412
AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-959
STEP 4. Using scan tool MB991958, read the diagnostic
trouble code (DTC).
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) After the MFI-DTC has been deleted, read the MFI-DTC
again.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC U1108 set?
YES : Replace the combination meter. Then go to Step 6.
NO : It can be assumed that this malfunction is intermittent
of CAN bus line between PCM and combination
meter. Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points
STEP 5. Using scan tool MB991958, read the diagnostic
trouble code (DTC).
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) After the MFI-DTC has been deleted, read the MFI-DTC
again.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC U1108 set?
YES : Replace the PCM. Then go to Step 6.
NO : It can be assumed that this malfunction is intermittent
of CAN bus line between PCM and combination
meter. Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points
AC305412
AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
AC305412
AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-960
STEP 6. Using scan tool MB991958, read the diagnostic
trouble code (DTC).
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) After the MFI-DTC has been deleted, read the MFI-DTC
again.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC U1108 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.
DTC U1110: A/C-ECU TIME-OUT
CAUTION
• If the PCM output the DTC U1110, make sure
to diagnose the CAN bus line.
• Before replacing the ECU, make sure that the
communication circuit is operating normally.
.
DTC SET CONDITIONS
Check Conditions
• Battery positive voltage is 10 volts or higher.
• Engine is not cranked, or at least 3 seconds or
more have passed since engine was cranked.
Judgement Criteria
• Unable to receive A/C-ECU signals through the
CAN bus line.
.
COMMENT
Current Trouble
• Some of the possible causes are a harness or
connector damage between the PCM and the
A/C-ECU on the CAN bus line, a failure in the
A/C-ECU power supply system, a failure in the
A/C-ECU, or a failure in the PCM.
Past Trouble
• Proceed to troubleshoot based on a harness or
connector damage on the CAN bus line between
the PCM and A/C-ECU, and a failure in the A/C
power supply system. Refer to "How to cope with
past trouble" (Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points
AC305412
AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
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