Mitsubishi Lancer (4A9 engine). Manual - part 279
TROUBLESHOOTING
CONTROLLER AREA NETWORK (CAN)
54C-140
YES :
Repair the wiring harness between C-23
KOS-ECU connector and C-04 joint
connector (CAN1).
NO :
Check the KOS-ECU connector, and repair
if necessary. If the KOS-ECU connector is in
good condition, replace the KOS-ECU.
STEP 45. M.U.T.-III CAN bus diagnostics
(checking the radio and CD player for internal
short)
CAUTION
Strictly observe the specified wiring harness
repair procedure. For details refer to .
Disconnect C-103 radio and CD player connector,
and diagnose the CAN bus line.
ACB01921AC
M.U.T.
JC
JC
SAS
AT/
CVT
EPS
ENGINE
ABS/
ASC
: Red section on screen
AS&G
ETACS
JC
KOS/
WCM
SRS
A/C
AUDIO
METER
MMCS
Levelling
Cor ner
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 C-103
radio and CD player connector and C-04
joint connector (CAN1).
NO :
Check the radio and CD player connector,
and repair if necessary. If the radio and CD
player connector is in good condition,
replace the radio and CD player.
STEP 46. M.U.T.-III CAN bus diagnostics
(checking the CAN box unit for internal short)
CAUTION
Strictly observe the specified wiring harness
repair procedure. For details refer to .
Disconnect C-54 CAN box unit connector, and diag-
nose the CAN bus line.
ACB01921AC
M.U.T.
JC
JC
SAS
AT/
CVT
EPS
ENGINE
ABS/
ASC
: Red section on screen
AS&G
ETACS
JC
KOS/
WCM
SRS
A/C
AUDIO
METER
MMCS
Levelling
Cor ner
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 C-54
CAN box unit connector and C-04 joint
connector (CAN1).
NO :
Check the CAN box unit connector, and
repair if necessary. If the CAN box unit
connector is in good condition, replace the
CAN box unit.
STEP 47. Trouble symptom check
Diagnose the CAN bus line, and check that normal
condition is displayed.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
use Troubleshooting/inspection Service
Points
− How to Cope with Intermittent
Malfunction ).
NO :
Check the ETACS-ECU connector, and
repair if necessary. If the ETACS-ECU
connector is in good condition, replace the
ETACS-ECU.