Mitsubishi Lancer (4A9 engine). Manual — part 253
TROUBLESHOOTING
CONTROLLER AREA NETWORK (CAN)
54C-36
STEP 19. M.U.T.-III CAN bus diagnostics
(checking the engine-ECU for internal short)
CAUTION
Strictly observe the specified wiring harness
repair procedure. For details refer to .
Disconnect B-09 <except 1800-Diesel> or B-40
<1800-Diesel> engine-ECU connector, and diagnose
the CAN bus line.
ACB01921AB
M.U.T.
JC
JC
SAS
KOS/
WCM
SRS
A/C
AUDIO
METER
AT/
CVT
EPS
ENGINE
ETACS
ABS/
ASC
MMCS
: Red section on screen
AS&G
Levelling
Cor ner
JC
OK: The display of the M.U.T.-III is as shown
in the figure.
Q: Does M.U.T.-III screen correspond to the
illustration?
YES :
Repair the wiring harness between B-09
<Petrol> or B-40 <Diesel> engine-ECU
connector and C-124 joint connector
(CAN3).
NO :
Check the engine-ECU connector, and
repair if necessary. If the engine-ECU
connector is in good condition, replace the
engine-ECU.
TROUBLESHOOTING
CONTROLLER AREA NETWORK (CAN)
54C-37
Diagnosis Item 4: Diagnose shorts in the earth to CAN-C bus line
CAUTION
When servicing a CAN bus line, earth yourself by touching a metal object such as an unpainted water
pipe. If you fail to do, a component connected to the CAN bus line may be broken.
CAN-C Communication Circuit <Except for RALLIART>
ETACS-ECU
INTERFACE
CIRCUIT
CAN DRIVE
CIRCUIT
ASC-ECU
A/T-ECU
ABS-ECU
CVT-ECU
STEERING
WHEEL SENSOR
<AFS, ASC>
ENGINE-ECU
ELECTRIC
POWER
STEERING-ECU
Wire colour code
B : Black LG : Light green G : Green L : Blue W : White
Y : Yellow SB : Sky blue BR : Brown O : Orange GR : Grey
R : Red P : Pink V : Violet PU : Purple SI : Silver
CORNER SENSOR/
BACK SENSOR-ECU
DIESEL
:
PETROL
:
1800-PETROL, 2000
:
NOTE
PETROL (EXCEPT SOHC)
:
VEHICLES WITHOUT ASC
:
VEHICLES WITH ASC
:
HEADLAMP
AUTOMATIC
LEVELLING-ECU
AS&G-ECU
TROUBLESHOOTING
CONTROLLER AREA NETWORK (CAN)
54C-38
AC801250
Connectors: A-04, A-58 <LHD>
AB
A-04 (B),
A-58 (B)
AC801253
AG
Connector: A-58 <RHD>
A-58 (B)
AC800715
Connectors: B-09, B-40
BC
B-09 (GR),
B-40 (B)
ACB02645
AE
C-03 (GR)
C-35
Connectors: C-03, C-35, C-40, C-124, C-127
<LHD>
C-40
C-127 (GR)
C-124 (GR)
ACB02648
AD
C-03 (GR)
C-114
C-35
Connectors: C-03, C-35, C-114, C-127 <RHD>
C-127 (GR)
ACB02646
AD
C-64
C-14
C-114
Connectors: C-14, C-64, C-114 <LHD>
ACB02647
AD
C-64
C-124 (GR)
C-04 (GR)
Connectors: C-14, C-64, C-124 <RHD>
AC612708 AW
Connector: C-211 <LHD>
AC612716 AX
Connectors: C-211 <RHD>
ACA00886
BE
Connector: C-301 <LHD>
ETACS-ECU
TROUBLESHOOTING
CONTROLLER AREA NETWORK (CAN)
54C-39
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