Mitsubishi Galant 9G. Manual — part 1345
DIAGNOSIS
TSB Revision
CONTROLLER AREA NETWORK (CAN)
54C-484
STEP 23. Check the CAN bus lines between intermediate
connector C-29 and the joint connector (3). Measure the
resistance between intermediate connector C-29 and joint
connector (3) C-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 joint connector (3) C-02 and intermediate
connector C-29, and measure the resistance between the
wiring harness side connector of joint connector (3) C-02
and the female side connector of intermediate connector
C-29 (instrument panel 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.
AC305232
CONNECTORS: C-02, C-29
AG
C-02
C-02
C-29
C-29
DIAGNOSIS
TSB Revision
CONTROLLER AREA NETWORK (CAN)
54C-485
(4) Measure the resistance between joint connector (3)
terminal 20 and intermediate connector terminal 12.
OK: 2 ohms or less
(5) Measure the resistance between joint connector (3)
terminal 9 and intermediate connector C-29 terminal 11.
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 powertrain control module may be
suspected. Diagnose the engine. Refer to GROUP
13A, MFI diagnosis
<2.4L engine> or
GROUP 13B, MFI diagnosis
<3.8L
engine>.
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 intermediate connector.
AC204582
35
34
36
30
38
29
17
13 12 11
37
31
33 32
26
27
28
16
14
15
3 2
4
18
6
7
21 20
5
19
9
10
24 23
25
8
22
1
TEST
HARNESS
FEMALE SIDE: C-29
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
CR
AC204582
35
34
36
30
38
29
17
13 12 11
37
31
33 32
26
27
28
16
14
15
3 2
4
18
6
7
21 20
5
19
9
10
24 23
25
8
22
1
TEST
HARNESS
FEMALE SIDE: C-29
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
CQ
DIAGNOSIS
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CONTROLLER AREA NETWORK (CAN)
54C-486
DIAGNOSTIC ITEM 15: Diagnose CAN bus lines thoroughly <Vehicles with ABS and vehicles without
multi-center display (middle-grade type)>
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.
DATA LINK
CONNECTOR
ETACS-ECU
POWERTRAIN
CONTROL MODULE
JOINT
CONNECTOR (3)
COMBINATION
METER
A/C-ECU
SRS-ECU
NOTE
: MANUAL AIR CONDITIONING SYSTEM <LOW>
: MANUAL AIR CONDITIONING SYSTEM<MIDDLE>
OR AUTOMATIC AIR CONDITIONING SYSTEM
ABS-ECU
DIAGNOSIS
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CONTROLLER AREA NETWORK (CAN)
54C-487
.
TROUBLE JUDGMENT
If the MUT-III cannot received signals from ECUs,
CAN bus line connector(s) are broken or an open cir-
cuit 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 a ECU 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 ETACS-ECU may be defective
• The combination meter may be defective
• The A/C-ECU may be defective
• The SRS-ECU may be defective
• The ABS-ECU may be defective
• The powertrain control module may be defective
AC305206
CONNECTOR: A-02
AR
A-02 (GR)
AC306248AB
B-19 (B)
CONNECTOR: B-19
AIR
CLEANER
PCM
AC305231BZ
C-101
C-125 (B)
C-29
C-02
CONNECTORS: C-02, C-29, C-101, C-125
AC305233 AU
CONNECTORS: C-10, C-15, C-22, C-121
C-121 (Y)
C-22 (Y)
C-10 (B)
C-15 (B)
AC305413
C-218 (GR)
CONNECTOR: C-218
AJ
JUNCTION BLOCK
(REAR VIEW)
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