Mitsubishi 380. Manual — part 748
DIAGNOSIS
CONTROLLER AREA NETWORK (CAN)
54C-403
DIAGNOSIS
Required Special Tool:
• MB991223: Harness Set
STEP 1. Check joint connector (3) C-02 and combination
meter connector C-101 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
Check the joint connector at the wiring harness side for loose,
corroded or damaged terminals, or terminals pushed back in
the connector, and also check the short pin behind the connec-
tor for corrosion, deformation and delamination.
Q: Are joint connector (3) C-02 and combination meter
connector C-101 in good condition?
YES : Go to Step 2.
NO : Repair the damaged parts. Replace the joint
connector as necessary.
16DB476A
HARNESS SIDE
C-101
CONNECTORS: C-02, C-101
C-02
C-02
C-101
AC209350
1
12
2
13
3
14
4
15
5
16
6
17
7
18
8
19
9
20
10
21
11
22
AB
SHORT PIN
DIAGNOSIS
CONTROLLER AREA NETWORK (CAN)
54C-404
STEP 2. Check the CAN bus lines between joint connector
(3) and the combination meter. Measure the resistance
between joint connector (3) C-02 and combination meter
connector C-101.
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 joint connector (3) C-02 and combination meter
connector C-101, and measure the resistance between
each wiring harness side connector.
(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.
16DB476A
HARNESS SIDE
C-101
CONNECTORS: C-02, C-101
C-02
C-02
C-101
CAN COMMUNICATION SIGNAL TABLE
CONTROLLER AREA NETWORK (CAN)
54C-405
(4) Measure the resistance between joint connector (3)
terminal 15 and combination meter connector terminal 15.
OK: 2 ohms or less
(5) Measure the resistance between joint connector (3)
terminal 4 and combination meter 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, power
supply to the combination meter may be suspected.
Diagnose the combination meter. Refer to GROUP
54A, Combination meter assembly
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 joint
connector (3) and the combination meter connector.
CAN COMMUNICATION SIGNAL TABLE
M1548300400059
AC204582
HARNESS SIDE: C-02
BZ
11
22
10
21
9
20
8
19
7
18
6
17
5
16
4
15
3
14
2
13
1
12
G
G
22
11
5
16
19
20
21
17
18
8
10 9
7 6
13
1514
12
2
4 3
1
TEST
HARNESS
HARNESS SIDE: C-101
TEST
HARNESS
AC204582
HARNESS SIDE: C-02
TEST
HARNESS
11
22
10
21
9
20
8
19
7
18
6
17
5
16
4
15
3
14
2
13
1
12
G
G
22
11
5
16
19
20
21
17
18
8
10 9
7 6
13
1514
12
2
4 3
1
TEST
HARNESS
HARNESS SIDE: C-101
CA
CAN COMMUNICATION SIGNAL TABLE
CONTROLLER AREA NETWORK (CAN)
54C-406
SIGNAL
TRANSMITTER
ECU
RECEIVER
ECU
ENGINE-EC
U
A/T-ECU
ABS-ECU
MULTI-CENT
ER DISPLAY
UNIT
(MIDDLE-
GRADE
TYPE)
COMBINATI
ON METER
A/C-ECU
ETACS-ECU
Engine speed signal
Engine-
ECU
−
−
×
−
×
×
−
A/C information signal
−
−
−
−
−
×
−
Vehicle speed signal
−
×
−
−
×
×
−
Vehicle stop signal
−
−
−
×
×
×
×
Malfunction indicator
lamp request signal
−
−
−
−
×
−
−
Auto-cruise control
indicator lamp signal
−
−
−
−
×
−
−
Engine coolant
temperature signal
−
−
−
−
×
×
−
Selector position signal A/T-ECU
−
−
×
−
×
×
×
ABS warning light
request signal
ABS-ECU
−
−
−
−
×
−
−
SRS warning light
request signal
SRS-ECU
−
−
−
−
×
−
−
Communication
continuation request
signal
Multi-cent
er display
unit
−
−
−
−
−
×
×
Ignition switch (ACC)
signal
−
−
−
−
−
×
×
Adjustment request
signal
−
−
−
−
−
×
×
Customize signal
−
−
−
−
−
×
×
Tone alarm sound
signal
−
−
−
−
−
×
×
Communication
continuation request
signal
Combinati
on meter
−
−
−
−
−
−
×
Vehicle speed signal
−
−
−
−
−
−
×
Ignition switch (IG1)
signal
−
−
−
−
−
−
×
Seat belt signal
−
−
−
−
−
−
×
Fuel information signal
×
−
−
−
−
−
−
Communication
continuation request
signal
A/C-ECU
−
−
−
−
−
−
×
Compressor signal
×
−
−
−
−
−
−
Idle-up request signal
×
−
−
−
−
−
−
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