Mitsubishi L200. Manual — part 820
TROUBLESHOOTING
CONTROLLER AREA NETWORK (CAN)
54C-39
STEP 22. Check the CAN line between joint
connector (CAN1) and the diagnosis connector.
Voltage measurement at C-119 joint connector
(CAN1).
CAUTION
A digital multimeter should be used. For details
refer to
CAUTION
The test wiring harness should be used. For
details refer to
AC903853
BM
Connector: C-119 <LHD>
C-119 (GR)
AC903868
CM
Connector: C-119 <RHD>
C-119 (GR)
(1) Disconnect joint connector (CAN1), and measure
at the wiring harness side.
(2) Connect the negative battery terminal, and turn
the ignition switch to the ON position.
AC209365
AC209365
AC209365
AC209365
AC209365SA
Harness side: C-119
Test harness
(3) Voltage between C-119 joint connector (CAN1)
terminal No.10 (CAN_H) and body earth
OK: Less than 1.0 V
AC209365
AC209365
AC209365
Test harness
AC209365
AC209365
AC209365SB
Harness side: C-119
(4) Voltage between C-119 joint connector (CAN1)
terminal No.21 (CAN_L) and body earth
OK: Less than 1.0 V
(5) Disconnect the negative battery terminal.
CAUTION
Strictly observe the specified wiring harness
repair procedure. For details refer to
Q: Is the check result normal?
YES :
<Less than 1.0 V> Repair the intermediate
connector, or the wiring harness between
joint connector (CAN1) and the intermediate
connector C-53 <LHD> or C-35 <RHD>.
NO :
<1.0 V or more> Repair the diagnosis
connector, or the wiring harness between
joint connector (CAN1) and the diagnosis
connector.
TROUBLESHOOTING
CONTROLLER AREA NETWORK (CAN)
54C-40
STEP 23. M.U.T.-III CAN bus diagnostics [engine-
ECU connector disconnected]
AC903853
BV
Connector: C-103 <LHD>
C-103 (B)
Harness side
AC903865 AY
Connector: C-103 <RHD>
Harness side
C-103 (B)
(1) Disconnect engine-ECU connector C-103 and
diagnose by using the M.U.T.-III.
ACA01247
: Red section on screen
AB
ETACS
DISPLAY
ABS/ASC
SAS
YR/G
A/C
AT
ENGINE
JC
JC
M.U.T.
(2) Diagnose CAN bus lines, and check if M.U.T.-III
screen is as shown in the illustration.
Q: Does M.U.T.-III screen correspond to the
illustration?
YES :
Go to Step 25.
NO :
Check the engine-ECU connector, and
repair if necessary. If the engine-ECU
connector is in good condition, go to Step
24.
STEP 24. M.U.T.-III CAN bus diagnostics (retest
the system)
Diagnose CAN bus lines, and check if M.U.T.-III
screen shows normal state.
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 engine-ECU connector, and
repair if necessary. If the engine-ECU
connector is in good condition, replace the
engine-ECU.
STEP 25. M.U.T.-III CAN bus diagnostics [ETACS-
ECU connector disconnected]
AC509934
Connector: C-219 <LHD>
AD
C-219 (GR)
Harness side
Junction block
AC509943
Connector: C-219 <RHD>
AB
C-219 (GR)
Harness side
Junction block
(Rear view)
(1) Disconnect ETACS-ECU connector C-219, and
diagnose by using the M.U.T.-III.
ACA01247
: Red section on screen
AB
ETACS
DISPLAY
ABS/ASC
SAS
YR/G
A/C
AT
ENGINE
JC
JC
M.U.T.
(2) Diagnose CAN bus lines, and check if M.U.T.-III
screen is as shown in the illustration.
Q: Does M.U.T.-III screen correspond to the
illustration?
TROUBLESHOOTING
CONTROLLER AREA NETWORK (CAN)
54C-41
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, go to Step
26.
STEP 26. M.U.T.-III CAN bus diagnostics (retest
the system)
Diagnose CAN bus lines, and check if M.U.T.-III
screen shows normal state.
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.
TROUBLESHOOTING
CONTROLLER AREA NETWORK (CAN)
54C-42
Diagnosis Item 2: Diagnose shorts in the earth to CAN 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.
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст