Mitsubishi 380. Manual — part 878
COMBINATION METER ASSEMBLY
CHASSIS ELECTRICAL
54A-46
DIAGNOSIS FUNCTION
M1543007000454
HOW TO CONNECT DIAGNOSTIC TOOL (MUT-III)
Required Special Tools:
• MB991958: Diagnostic Tool (MUT-III Sub Assembly)
• MB991824: Vehicle Communication Interface (V.C.I.)
• MB991827: MUT-III USB Cable
• MB991910: MUT-III Main Harness A (Vehicles with CAN
communication system)
CAUTION
To prevent damage to diagnostic tool MB991958, always
turn the ignition switch to the "LOCK" (OFF) position
before connecting or disconnecting diagnostic tool
MB991958.
1. Ensure that the ignition switch is at the "LOCK" (OFF)
position.
2. Start up the personal computer.
3. Connect special tool MB991827 to special tool MB991824
and the personal computer.
4. Connect special tool MB991910 to special tool MB991824.
5. Connect special tool MB991910 to the data link connector.
6. Turn the power switch of special tool MB991824 to the "ON"
position.
NOTE: When special tool MB991824 is energized, special
tool MB991824 indicator light will be illuminated in a green
color.
7. Start the MUT-III system on the personal computer.
NOTE: Disconnecting the diagnostic tool MB991958 is the
reverse of the connecting sequence, making sure that the
ignition switch is at the "LOCK" (OFF) position.
HOW TO READ AND ERASE DIAGNOSTIC
TROUBLE CODES
Required Special Tools:
• MB991958: Diagnostic Tool (MUT-III Sub Assembly)
• MB991824: Vehicle Communication Interface (V.C.I.)
• MB991827: MUT-III USB Cable
• MB991910: MUT-III Main Harness A (Vehicles with CAN
communication system)
CAUTION
To prevent damage to diagnostic tool MB991958, always
turn the ignition switch to the "LOCK" (OFF) position
before connecting or disconnecting diagnostic tool
MB991958.
NOTE: If the battery voltage is low, diagnostic trouble codes will
not be set. Check the battery if diagnostic tool MB991958 does
not display.
00DB076A
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
COMBINATION METER ASSEMBLY
CHASSIS ELECTRICAL
54A-47
1. Connect diagnostic tool MB991958 to the data link
connector.
2. Turn the ignition switch to "ON" position.
3. Select "Interactive Diagnosis" from the start-up screen.
4. Select "System select."
5. Choose "Meter" .
6. Select "Diagnostic Trouble Code."
7. If a DTC is set, it is shown.
8. Choose "Erase DTCs" to erase the DTC.
HOW TO DIAGNOSE THE CAN BUS LINES
Required Special Tools:
• MB991958: Diagnostic Tool (MUT-III Sub Assembly)
• MB991824: Vehicle Communication Interface (V.C.I.)
• MB991827: MUT-III USB Cable
• MB991910: MUT-III Main Harness A (Vehicles with CAN
communication system)
CAUTION
To prevent damage to diagnostic tool MB991958, always
turn the ignition switch to the "LOCK" (OFF) position
before connecting or disconnecting diagnostic tool
MB991958.
00DB076A
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
COMBINATION METER ASSEMBLY
CHASSIS ELECTRICAL
54A-48
1. Connect diagnostic tool MB991958 to the data link
connector.
2. Turn the ignition switch to "ON" position.
3. Select "CAN bus diagnosis" from the start-up screen.
4. When the vehicle information is displayed, confirm that it
matches the vehicle whose CAN bus lines will be
diagnosed.
• If they matches, go to step 8.
• If not, go to step 5.
5. Select "view vehicle information" button.
6. Enter the vehicle information and select the "OK" button.
7. When the vehicle information is displayed, confirm again
that it matches the vehicle whose CAN bus lines will be
diagnosed.
• If they matches, go to step 8.
• If not, go to step 5.
8. Select the "OK" button.
9. When the optional equipment is displayed, choose the one
which the vehicle is fitted with, and then select the "OK"
button.
DIAGNOSTIC TROUBLE CODE CHART
M1543007100440
CAUTION
During diagnosis, a DTC code associated with
other system may be set when the ignition switch
is turned on with connector(s) disconnected. On
completion, confirm all systems for DTC code(s).
If DTC code(s) are set, erase them all.
00DB076A
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
DTC NO.
Diagnostic item
REFERENCE PAGE
U1073
Bus off
U1100
Engine ECU time-out (related to engine)
U1101
Auto Transmission ECU time-out (related to A/T)
U1102
ABS-ECU time-out
U1109
ETACS-ECU time-out
U1112
SRS-ECU time-out
U1120
Failure information on Engine ECU (related to engine)
U1206
Flag invalid
COMBINATION METER ASSEMBLY
CHASSIS ELECTRICAL
54A-49
DIAGNOSTIC TROUBLE CODE PROCEDURES
DTC U1073: Bus Off
CAUTION
If DTC U1073 is set in the combination meter,
always diagnose the CAN bus lines.
CAUTION
Whenever the ECU is replaced, ensure that the
communication circuit is normal.
.
CIRCUIT OPERATION
Some instruments of the combination meter are
linked to the CAN bus line. Both the combination
meter and the Engine ECU have a terminator resis-
tor.
.
DTC SET CONDITION
If the combination meter ceases communicating
once (i.e. bus off) and then returns to it, the combina-
tion meter will not communicate for five minutes
immediately after that point. This five minute period
is called "Penalty mode." Immediately after the com-
bination meter returns to communication, the DTC is
set.
.
TECHNICAL DESCRIPTION (COMMENT)
The wiring harness or connectors may have loose,
corroded, or damage terminals, or terminals pushed
back in the connector, or the combination meter may
be defective.
.
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 combination meter.
A-02 (GR)
CONNECTOR: A-02
16DB407A
COVER
ENGINE
CONTROL
UNIT
AIR
CLEANER
A/T
CONTROL
UNIT
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