Mitsubishi 380. Manual — part 931
MULTI-CENTER DISPLAY
CHASSIS ELECTRICAL
54A-258
DIAGNOSIS
Required Special Tools:
• MB991958: Diagnostic Tool (MUT-III Sub Assembly)
• MB991824: Vehicle Communication Interface (V.C.I.)
• MB991827: MUT-III USB Cable
• MB991911: MUT-III Main Harness A (Vehicles with CAN
communication system)
STEP 1. Using diagnostic tool MB991958, diagnose the
CAN bus line.
Use diagnostic tool MB991958 to diagnose the CAN bus lines.
(1) Connect diagnostic tool MB991958 to the data link
connector.
(2) Turn the ignition switch to "ON" position.
(3) Diagnose the CAN bus line.
Q: Is the check result satisfactory?
YES : Go to Step 2.
NO : Repair the CAN bus lines (Refer to GROUP 54C,
Diagnosis-Can Bus Diagnostic Chart
). On
completion, go to Step 6.
STEP 2. Using diagnostic tool MB991958, read MPI
diagnostic trouble code
Check if an MPI system DTC is set.
Q: Is the DTC set?
YES : Diagnose the MPI system by referring to GROUP
13A, Diagnosis
− Diagnostic Trouble Code Chart
.
NO : Go to Step 3.
00DB076A
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
MULTI-CENTER DISPLAY
CHASSIS ELECTRICAL
54A-259
STEP 3. Using diagnostic tool MB991958, read the
diagnostic trouble code related to the other system.
Check if a DTC, which relates to CAN communication-linked
systems below, is set.
ABS-ECU
• DTC U1100: Engine ECU time-out <vehicles with TCL>
Combination meter
• DTC 011 (U1100): Engine-ECU time-out
ETACS-ECU
• DTC 011 (U1100): Engine-ECU time-out
A/C-ECU
• DTC U1100: Engine-ECU time-out
Q: Is the DTC set?
YES : Go to Step 4.
NO : Go to Step 5.
STEP 4. Recheck for diagnostic trouble code.
Recheck if the DTC is set.
1. Erase the DTC.
2. Turn the ignition switch to "ON" position.
3. Check if the DTC is set.
Q: Is the check result satisfactory?
YES : A poor connection, open circuit or other intermittent
malfunction is present in the CAN bus lines between
the Engine ECU and the middle-grade multi-centre
display unit (Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points - How to
Cope with Intermittent Malfunction
NO : Replace Engine ECU and then go to step 6.
STEP 5. Recheck for diagnostic trouble code.
Recheck if the DTC is set.
1. Erase the DTC.
2. Turn the ignition switch to "ON" position.
3. Check if the DTC is set.
Q: Is the check result satisfactory?
YES : A poor connection, open circuit or other intermittent
malfunction is present in the CAN bus lines between
the Engine ECU and the middle-grade multi-centre
display unit (Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points - How to
Cope with Intermittent Malfunction
NO : Replace multi-centre display unit and then go to step
MULTI-CENTER DISPLAY
CHASSIS ELECTRICAL
54A-260
STEP 6. Recheck for diagnostic trouble code.
Recheck if the DTC is set.
1. Erase the DTC.
2. Turn the ignition switch to "ON" position.
3. Check if the DTC is set.
Q: Is the check result satisfactory?
YES : The procedure is complete.
NO : Go to Step 1.
DTC 012 (U1101): A/T ECU Time-out
CAUTION
If DTC 012 (U1101) is set in the multi-centre dis-
play, always diagnose the CAN bus lines.
CAUTION
Whenever the ECU is replaced, ensure that the
communication circuit is normal.
.
CIRCUIT OPERATION
Refer to
.
.
DTC SET CONDITION
DTC 012 (U1101)
• The multi-centre display unit receives A/T control
system-related signals from the A/T-ECU via
CAN bus lines. If the display unit can not receive
the necessary signals, DTC 012 (U1101) will be
set.
.
TECHNICAL DESCRIPTION (COMMENT)
CAUTION
If the ignition switch is turned to the ON position
without starting the engine, DTC (past trouble)
013 (U1110) and 014 (U1108) may be set on the
combination meter (incorporating meter-ECU)
after three minutes.
Current trouble
• Connector(s) or wiring harness in the CAN bus
lines between the A/T-ECU and the multi-centre
display unit, the power supply system to the dis-
play unit, the display unit itself, or the A/T-ECU
may be defective.
Past trouble
• Carry out diagnosis with particular emphasis on
connector(s) or wiring harness in the CAN bus
lines between the A/T-ECU and the multi-centre
display unit, and the power supply system to the
A/T-ECU. For diagnosis procedures, refer to
"How to cope with past trouble" (Refer to GROUP
00, How to Use Troubleshooting/Inspection Ser-
vice Points
).
NOTE: For a past trouble, you may not find it by
the MUT-III CAN bus diagnostics even if there is
any failure in CAN bus lines. In this case, refer to
GROUP 00, How to Use Troubleshooting/Inspec-
tion Service Points - How to Cope with Intermit-
tent Malfunction
.) and check the CAN
bus lines. You can narrow down the possible
cause of the trouble by referring to the DTC,
which is set regarding the CAN communica-
tion-linked ECUs (Refer to GROUP 54C, CAN
bus line Diagnostics Flow
).
.
TROUBLESHOOTING HINTS
• Refer to circuit diagrams GROUP-
• Refer to configuration diagrams GROUP-
• The wiring harness or connectors may have
loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector.
• Malfunction of A/T-ECU.
• Malfunction of multi-centre display unit
MULTI-CENTER DISPLAY
CHASSIS ELECTRICAL
54A-261
DIAGNOSIS
Required Special Tools:
• MB991958: Diagnostic Tool (MUT-III Sub Assembly)
• MB991824: Vehicle Communication Interface (V.C.I.)
• MB991827: MUT-III USB Cable
• MB991911: MUT-III Main Harness A (Vehicles with CAN
communication system)
STEP 1. Using diagnostic tool MB991958, diagnose the
CAN bus line.
Use diagnostic tool MB991958 to diagnose the CAN bus lines.
(1) Connect diagnostic tool MB991958 to the data link
connector.
(2) Turn the ignition switch to "ON" position.
(3) Diagnose the CAN bus line.
Q: Is the check result satisfactory?
YES : Go to Step 2.
NO : Repair the CAN bus lines (Refer to GROUP 54C,
Diagnosis-Can Bus Diagnostic Chart
). On
completion, go to Step 6.
STEP 2. Using diagnostic tool MB991958, read A/T
diagnostic trouble code
Check if an A/T system DTC is set.
Q: Is the DTC set?
YES : Diagnose the A/T system by referring to GROUP 23A,
Diagnosis
− Diagnostic Trouble Code Chart
.
NO : Go to Step 3.
00DB076A
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст