Mitsubishi 380. Manual — part 656
DIAGNOSIS
CONTROLLER AREA NETWORK (CAN)
54C-35
(3) Measure the voltage between data link connector terminal 6
and body ground.
OK: 4.0 V or less
Q: Does the voltage measure 4.0 V or less?
YES : If the voltage measures 4.0 V or less, go to Step 3.
NO : If the voltage measures more than 4.0 V, go to Step 4.
AC209365
HARNESS SIDE: C-125
TEST
HARNESS
FN
Y
8
16
15
7
5
1314
6
12
4
2
1011
3
9
1
DIAGNOSIS
CONTROLLER AREA NETWORK (CAN)
54C-36
STEP 3. Check the CAN_L-side bus line (communication
line including ECUs) for a short to the power supply.
Measure the voltage at data link connector C-125.
CAUTION
A digital multimeter should be used. For details refer to
CAUTION
The test wiring harness should be used. For details refer to
(1) Disconnect ENGINE-ECU connector B-21 and combination
meter connector C-101, and measure the voltage at the
harness side of data link connector C-125.
(2) Turn the ignition switch to the "ON" position.
16DB400A
COVER
ENGINE
CONTROL
UNIT
AIR
CLEANER
16DB475A
CONNECTORS: C-101, C-125
C-101
C-125
C-125 (B)
C-101 HARNESS SIDE
DIAGNOSIS
CONTROLLER AREA NETWORK (CAN)
54C-37
(3) Measure the voltage between data link connector terminal
14 and body ground.
OK: 4.0 V or less
Q: Does the voltage measure 4.0 V or less?
YES : If the voltage measures 4.0 V or less, diagnose CAN
bus lines thoroughly by referring to
NO : If the voltage measures more than 4.0 V, go to Step
27.
STEP 4. Check intermediate connector C-29 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
CAUTION
The strand end of the twisted wire should be within 10 cm
(4 inches) from the connector. For details refer to
Q: Is intermediate connector C-29 in good condition?
YES : Go to Step 5.
NO : Repair the damaged parts.
AC209365
HARNESS SIDE: C-125
FO
TEST
HARNESS
Y
8
16
15
7
5
1314
6
12
4
2
1011
3
9
1
52DB014A
CONNECTOR: C-29
DIAGNOSIS
CONTROLLER AREA NETWORK (CAN)
54C-38
STEP 5. Check the CAN_H-side bus line (communication
line including ECUs) of the front wiring harness for a short
to the power supply. Measure the voltage at intermediate
connector C-29.
CAUTION
A digital multimeter should be used. For details refer to
CAUTION
The test wiring harness should be used. For details refer to
(1) Disconnect intermediate connector C-29, and measure the
voltage at the male side (at front wiring harness side).
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between intermediate connector
terminal 11 and body ground.
OK: 4.0 V or less
Q: Does the voltage measure 4.0 V or less?
YES : If the voltage measures 4.0 V or less, go to Step 6.
NO : If the voltage measures more than 4.0 V, go to Step
23.
52DB014A
CONNECTOR: C-29
AC209365
2 3
27
32
28
33
16
15
4 5
19
18
29
17
34
7 8
35
22
21
9 10
30
36
31
37
25
24
23
6
20
1
14
26
11
13
12
38
AC209365
MALE SIDE: C-29
TEST
HARNESS
FP
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