Mitsubishi 380. Manual — part 721
DIAGNOSIS
CONTROLLER AREA NETWORK (CAN)
54C-295
STEP 16. Check the CAN bus lines (communication line
only) between intermediate connector C-29 and the
ABS-ECU. Measure the resistance at intermediate
connector C-29 and ABS-ECU connector A-02.
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 ABS-ECU
connector A-02, and measure the resistance between the
wiring harness side connector of ABS-ECU connector A-02
and the male side connector of intermediate connector
C-29 (at front wiring harness side).
(2) Turn the ignition switch to the "LOCK" (OFF) position.
CAUTION
Disconnect the negative battery terminal. For details refer
to
.
(3) Disconnect the negative battery terminal.
52DB014A
CONNECTOR: C-29
16DB402A
A-02 (GR)
CONNECTOR: A-02
A-02 HARNESS CONNECTOR:
DIAGNOSIS
CONTROLLER AREA NETWORK (CAN)
54C-296
(4) Measure the resistance between intermediate connector
terminal 11 and ABS-ECU connector terminal 25.
OK: 2 ohms or less
(5) Measure the resistance between intermediate connector
terminal 12 and ABS-ECU connector terminal 14.
OK: 2 ohms or less
CAUTION
Strictly observe the specified wiring harness repair proce-
dure. For details refer to
Q: Do all the resistances measure 2 ohms or less?
YES : If all the resistances measure 2 ohms or less, go to
Step 17.
NO : If either of the resistances measures more than 2
ohms or all the resistances measure more than 2
ohms, repair the wiring harness between intermediate
connector C-29 and the ABS-ECU connector, and
then go to Step 8.
16DB513A
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
TEST
HARNESS
TEST
HARNESS
HARNESS SIDE: A-02
MALE SIDE: C-29
16DB514A
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
TEST
HARNESS
TEST
HARNESS
HARNESS SIDE: A-02
MALE SIDE: C-29
DIAGNOSIS
CONTROLLER AREA NETWORK (CAN)
54C-297
STEP 17. Check the ABS-ECU for open circuit. Measure
the resistance at ABS-ECU connector A-02.
CAUTION
A digital multimeter should be used. For details refer to
(1) Disconnect ABS-ECU connector A-02, and measure the
resistance at the component side of ABS-ECU connector
A-02.
(2) Measure the resistance between ABS-ECU connector
terminals 14 and 15.
OK: 2 ohms or less
(3) Measure the resistance between ABS-ECU connector
terminals 25 and 26.
OK: 2 ohms or less
Q: Do all the resistances measure 2 ohms or less?
YES : If all the resistances measure 2 ohms or less, go to
Step 8.
NO : If either of the resistances measures more than 2
ohms or all the resistances measure more than 2
ohms, replace the ABS-ECU.
16DB402A
A-02 (GR)
CONNECTOR: A-02
A-02 HARNESS CONNECTOR:
16DB515A
COMPONENT SIDE: A-02
TEST
HARNESS
TEST
HARNESS
16DB516A
COMPONENT SIDE: A-02
TEST
HARNESS
TEST
HARNESS
DIAGNOSIS
CONTROLLER AREA NETWORK (CAN)
54C-298
STEP 18. Check the A/T-ECU for open circuit. Measure the
resistance at A/T-ECU connector B-19.
NOTE: when diagnosing CAN-BUS on vehicles with
manual transmission (M/T), disregard A/T-ECU and it’s wir-
ing circuits and check between ABS-ECU and
ENGINE-ECU only.
• Refer to circuit diagrams GROUP-
• Refer to configuration diagrams GROUP-
CAUTION
A digital multimeter should be used. For details refer to
(1) Disconnect A/T-ECU connector B-19, and measure the
resistance at the component side of A/T-ECU connector
B-19.
(2) Measure the resistance between A/T-ECU connector B-19
terminals 14 and 5.
OK: 2 ohms or less
(3) Measure the resistance between A/T-ECU connector B-19
terminals 13 and 4.
OK: 2 ohms or less
Q: Do all the resistances measure 2 ohms or less?
YES : If all the resistances measure 2 ohms or less, go to
Step 8.
NO : If either of the resistances measures more than 2
ohms or all the resistances measure more than 2
ohms, replace the A/T-ECU.
16DB480A
COVER
ENGINE
CONTROL
UNIT
AIR
CLEANER
A/T
CONTROL
UNIT
16DB518A
TEST
HARNESS
TEST
HARNESS
COMPONENT SIDE: B-19
16DB519A
TEST
HARNESS
TEST
HARNESS
COMPONENT SIDE: B-19
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