Mitsubishi L200. Manual — part 816
TROUBLESHOOTING
CONTROLLER AREA NETWORK (CAN)
54C-23
DIAGNOSIS PROCEDURE
STEP 1. Check the CAN bus lines. Voltage
measurement at C-22 diagnosis connector.
CAUTION
A digital multimeter should be used. For details
refer to
CAUTION
The test wiring harness should be used. For
details refer to
NOTE: This inspection allows you to check that there
is a short to power supply in either CAN_H line or
CAN_L line. Thus, in the following steps, check the
CAN bus line that is defective.
AC903856BQ
Connector: C-22 <LHD>
C-22 (B)
Harness side
(Front side)
AC903868
CK
C-22 (B)
Connector: C-22 <RHD>
Harness side
(Front side)
AC903853
BV
Connector: C-103 <LHD>
C-103 (B)
Harness side
AC903865 AY
Connector: C-103 <RHD>
Harness side
C-103 (B)
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)
TROUBLESHOOTING
CONTROLLER AREA NETWORK (CAN)
54C-24
(1) Disconnect engine-ECU connector C-103 and
ETACS-ECU connector C-219, and measure the
voltage at the harness side of diagnosis
connector C-22.
(2) Connect the negative battery terminal, and turn
the ignition switch to the ON position.
AC209365
AC209365
AC209365PJ
Harness side: C-22
Test
harness
(3) Voltage between C-22 diagnosis connector
terminal No.6 (CAN_H) and body earth
OK: 4.0 V or less
AC209365
Harness side: C-22
Test
harness
AC209365
AC209365
AC209365PK
(4) Voltage between C-22 diagnosis connector
terminal No.14 (CAN_L) and body earth
OK: 4.0 V or less
(5) Disconnect the negative battery terminal.
Q: Is the check result normal?
YES :
<Both of the measurement results show 4.0
V or less> Go to Step 23 .
NO :
<Either of CAN_H line or CAN_L line the
measurement results show more than 4.0
V> Go to Step 2.
TROUBLESHOOTING
CONTROLLER AREA NETWORK (CAN)
54C-25
STEP 2. Check the CAN line. Voltage
measurement at C-53 <LHD> or C-35 <RHD>
intermediate connector.
CAUTION
A digital multimeter should be used. For details
refer to
CAUTION
The test wiring harness should be used. For
details refer to
AC903853
Connector: C-53 <LHD>
BI
AC903865
Connector: C-35 <RHD>
AQ
(1) Disconnect the intermediate connector, and
measure at its male-side intermediate connector
(at the control wiring harness side).
(2) Connect the negative battery terminal, and turn
the ignition switch to the ON position.
AC209365VV
Mail side: C-53 <LHD> or C-35 <RHD>
Test harness
(3) Voltage between C-53 <LHD> or C-35 <RHD>
intermediate connector terminal No.6 (CAN_H)
and body earth
OK: 4.0 V or less
AC209365VW
Mail side: C-53 <LHD> or C-35 <RHD>
Test harness
(4) Voltage between C-53 <LHD> or C-35 <RHD>
intermediate connector terminal No.7 (CAN_L)
and body earth
OK: 4.0 V or less
(5) Disconnect the negative battery terminal.
Q: Is the check result normal?
YES :
<4.0 V or less> Go to Step 7.
NO :
<More than 4.0 V> Go to Step 3.
TROUBLESHOOTING
CONTROLLER AREA NETWORK (CAN)
54C-26
STEP 3. Check the CAN line between joint
connector (CAN2) and the engine-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
AC209365RI
Harness side: C-01
Test harness
(3) Voltage between C-01 joint connector (CAN2)
terminal No.9 (CAN_H) and body earth <LHD>
OK: 4.0 V or less
AC209365
AC209365
AC209365
AC209365
AC209365VT
Harness side: C-01
Test harness
(4) Voltage between C-01 joint connector (CAN2)
terminal No.10 (CAN_H) and body earth <RHD>
OK: 4.0 V or less
AC209365
AC209365
AC209365
Test harness
AC209365
AC209365
AC209365RJ
Harness side: C-01
(5) Voltage between C-01 joint connector (CAN2)
terminal No.20 (CAN_L) and body earth <LHD>
OK: 4.0 V or less
AC209365
AC209365
AC209365
Test harness
AC209365
AC209365
AC209365VU
Harness side: C-01
(6) Voltage between C-01 joint connector (CAN2)
terminal No.21 (CAN_L) and body earth <RHD>
OK: 4.0 V or less
(7) Disconnect the negative battery terminal.
Q: Is the check result normal?
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