Mitsubishi 380. Manual — part 747
DIAGNOSIS
CONTROLLER AREA NETWORK (CAN)
54C-399
STEP 2. Check joint connector (3) C-02 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: Is joint connector (3) C-02 in good condition?
YES : Go to Step 3.
NO : Repair the damaged parts. Replace the joint
connector as necessary.
16DB408A
CONNECTOR: C-02
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-400
STEP 3. Check the CAN bus lines between joint connector
C-02 and the SRS-ECU. Measure the resistance between
joint connector C-02 and SRS-ECU connector C-121.
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 C-02 and SRS-ECU connector
C-121, and measure the resistance between the wiring
harness sides of SRS-ECU connector C-121 and the joint
connector C-02.
(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.
16DB408A
CONNECTOR: C-02
16DB478A
CONNECTOR: C-121
HARNESS SIDE
C-121 (Y)
48
21
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DIAGNOSIS
CONTROLLER AREA NETWORK (CAN)
54C-401
(4) Measure the resistance between joint connector C-02
terminal 14 and SRS-ECU connector C-121 terminal 43.
OK: 2 ohms or less
(5) Measure the resistance between joint connector C-02
terminal 3 and SRS-ECU connector C-121 terminal 32.
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 SRS-ECU may be suspected. Diagnose
the supplemental restraint system. Refer to GROUP
52B, SRS air bag diagnosis
.
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 C-02 and the SRS-ECU connector C-121.
16DB523A
11
22
10
21
9
20
8
19
7
18
6
17
5
16
4
15
3
14
2
13
1
12
TEST
HARNESS
TEST
HARNESS
HARNESS SIDE: C-02
HARNESS SIDE: C-121
48
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32
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16DB522A
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
TEST
HARNESS
HARNESS SIDE: C-121
48
21
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DIAGNOSIS
CONTROLLER AREA NETWORK (CAN)
54C-402
DIAGNOSTIC ITEM 16: Failure in the lines between CAN main bus line and the combination meter.
CAUTION
When servicing a CAN bus line, ground yourself
by touching a metal object such as an unpainted
water pipe. If you fail to do so, a component con-
nected to the CAN bus line may be damaged.
.
TROUBLE JUDGMENT
If the MUT-III cannot received signals from the com-
bination meter, CAN bus line connector(s) are bro-
ken or an open circuit has occurred.
.
COMMENTS ON TROUBLE SYMPTOM
The wiring harness wire or connectors may have
loose, corroded, or damage terminals, or terminals
pushed back in the connector, or the combination
meter may be defective.
.
TROUBLESHOOTING HINTS
• Refer to circuit diagrams GROUP-
• Refer to configuration diagrams GROUP-
• The wiring harness or connectors may have
loose, corroded, or damage terminals, or termi-
nals pushed back in the connector
• The combination meter may be defective
16DB476A
HARNESS SIDE
C-101
CONNECTORS: C-02, C-101
C-02
C-02
C-101
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