Mitsubishi L200. Manual — part 817
TROUBLESHOOTING
CONTROLLER AREA NETWORK (CAN)
54C-27
YES <M/T> :
<4.0 V or less> Repair intermediate
connector C-53 <LHD> or C-35 <RHD>, or
the wiring harness between joint connector
(CAN2) and intermediate connector C-53
<LHD> or C-35 <RHD>.
YES <A/T> :
<4.0 V or less> Go to Step 4.
NO :
<More than 4.0 V> Repair the wiring
harness between joint connector (CAN2)
and the engine-ECU connector.
STEP 4. Check the CAN line between joint
connector (CAN2) and the A/T-ECU. Voltage
measurement at C-01 joint connector (CAN2).
CAUTION
A digital multimeter should be used. For details
refer to
CAUTION
The test wiring harness should be used. For
details refer to
AC903853
BL
Connector: C-01 <LHD>
C-01 (L)
AC903865AU
Connector: C-01 <RHD>
C-01 (L)
(1) Disconnect joint connector (CAN2), 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
AC209365RK
Harness side: C-01
Test harness
(3) Voltage between C-01 joint connector (CAN2)
terminal No.10 (CAN_H) and body earth <LHD>
OK: 4.0 V or less
AC209365
AC209365
AC209365
AC209365
AC209365VX
Harness side: C-01
Test harness
(4) Voltage between C-01 joint connector (CAN2)
terminal No.9 (CAN_H) and body earth <RHD>
OK: 4.0 V or less
AC209365
AC209365
AC209365
Test harness
AC209365
AC209365
AC209365PP
Harness side: C-01
(5) Voltage between C-01 joint connector (CAN2)
TROUBLESHOOTING
CONTROLLER AREA NETWORK (CAN)
54C-28
terminal No.21 (CAN_L) and body earth <LHD>
OK: 4.0 V or less
AC209365
AC209365
AC209365
Test harness
AC209365
AC209365
AC209365VZ
Harness side: C-01
(6) Voltage between C-01 joint connector (CAN2)
terminal No.20 (CAN_L) and body earth <RHD>
OK: 4.0 V or less
(7) Disconnect the negative battery terminal.
Q: Is the check result normal?
YES :
<4.0 V or less> Repair intermediate
connector C-53 <LHD> or C-35 <RHD>, or
the wiring harness between joint connector
(CAN2) and the intermediate connector C-
53 <LHD> or C-35 <RHD>.
NO :
<More than 4.0 V> Go to Step 5.
STEP 5. M.U.T.-III CAN bus diagnostics [A/T-ECU
connector disconnected]
AC903856BR
Connector: C-20 <LHD>
Harness side
AC903868
CL
Connector: C-20 <RHD>
Harness side
(1) Disconnect A/T-ECU connector C-20, 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 :
Repair the wiring harness between joint
connector (CAN2) and the A/T-ECU
connector.
NO :
Check the A/T-ECU connector, and repair if
necessary. If the A/T-ECU connector is in
good condition, go to Step 6.
STEP 6. 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 A/T-ECU connector, and repair if
necessary. If the A/T-ECU connector is in
good condition, replace the A/T-ECU.
TROUBLESHOOTING
CONTROLLER AREA NETWORK (CAN)
54C-29
STEP 7. Check the CAN line between joint
connector (CAN1) and the ETACS-ECU. 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
AC209365RM
Harness side: C-119
Test harness
(3) Voltage between C-119 joint connector (CAN1)
terminal No.9 (CAN_H) and body earth
OK: 4.0 V or less
AC209365
AC209365
AC209365
Test harness
AC209365
AC209365
AC209365RN
Harness side: C-119
(4) Voltage between C-119 joint connector (CAN1)
terminal No.20 (CAN_L) and body earth
OK: 4.0 V or less
(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 :
<4.0 V or less> Go to Step 8.
NO :
<More than 4.0 V> Repair the wiring
harness between joint connector (CAN1)
and the ETACS-ECU connector.
TROUBLESHOOTING
CONTROLLER AREA NETWORK (CAN)
54C-30
STEP 8. Check the CAN line between joint
connector (CAN1) and the RV meter. 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
AC209365RQ
Harness side: C-119
Test harness
(3) Voltage between C-119 joint connector (CAN1)
terminal No.7 (CAN_H) and body earth
OK: 4.0 V or less
AC209365
AC209365
AC209365
Test harness
AC209365
AC209365
AC209365RR
Harness side: C-119
(4) Voltage between C-119 joint connector (CAN1)
terminal No.18 (CAN_L) and body earth
OK: 4.0 V or less
(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 <vehicles without ABS, ASTC and A/C> :
<4.0
V or less> Go to Step 22.
YES <vehicles with ABS> :
<4.0 V or less> Go to
Step 10.
YES <vehicles with ASTC> :
<4.0 V or less> Go to
Step 13.
YES <vehicles without ABS and ASTC, and with A/
C> :
<4.0 V or less> Go to Step 20.
NO :
<More than 4.0 V> Go to Step 9.
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