Mitsubishi Galant 9G. Manual — part 1363
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DIAGNOSIS
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CONTROLLER AREA NETWORK (CAN)
54C-556
TROUBLE JUDGMENT
If the MUT-III cannot received signals from the pow-
ertrain control module, CAN bus line connector(s)
are broken 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 powertrain con-
trol module may be defective.
.
TROUBLESHOOTING HINTS
• The wiring harness or connectors may have
loose, corroded, or damage terminals, or termi-
nals pushed back in the connector
• The powertrain control module may be defective
DIAGNOSIS
Required Special Tool:
• MB991223: Harness Set
STEP 1. Check intermediate connector C-29 and
powertrain control module connector B-19 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: Are intermediate connector C-29 and powertrain control
module connector B-19 in good condition?
YES : Go to Step 2.
NO : Repair the damaged parts. Replace the joint
connector as necessary.
AC306248AD
B-19 (B)
CONNECTOR: B-19
PCM
AIR
CLEANER
HARNESS SIDE
AC305231AI
CONNECTOR: C-29
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DIAGNOSIS
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CONTROLLER AREA NETWORK (CAN)
54C-557
STEP 2. Check the CAN bus lines between intermediate
connector C-29 and the powertrain control module.
Measure the resistance between intermediate connector
C-29 and powertrain control module connector B-19.
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 powertrain
control module connector B-19, and measure the resistance
between the wiring harness side connector of powertrain
control module connector B-19 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.
AC306248AD
B-19 (B)
CONNECTOR: B-19
PCM
AIR
CLEANER
HARNESS SIDE
AC305231AI
CONNECTOR: C-29
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DIAGNOSIS
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CONTROLLER AREA NETWORK (CAN)
54C-558
(4) Measure the resistance between intermediate connector
terminal 11 and powertrain control module connector
terminal 17.
OK: 2 ohms or less
(5) Measure the resistance between intermediate connector
terminal 12 and powertrain control module connector
terminal 18.
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 3.
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 powertrain control module
connector.
AC204582
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
AC204582
TEST
HARNESS
3
17
10
13
18
4
11
14
7
16 15
1
2
5
12
9
6
8
JAE
HARNESS SIDE: B-19
TEST
HARNESS
CY
MALE SIDE: C-29
AC204582
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
AC204582
TEST
HARNESS
HARNESS SIDE: B-19
TEST
HARNESS
3
17
10
13
18
4
11
14
7
16 15
1
2
5
12
9
6
8
JAE
CX
MALE SIDE: C-29
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DIAGNOSIS
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CONTROLLER AREA NETWORK (CAN)
54C-559
STEP 3. 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 4.
NO : Repair the damaged parts. Replace the joint
connector as necessary.
AC305231AP
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
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