Mitsubishi Galant 9G. Manual — part 1297
DIAGNOSIS
TSB Revision
CONTROLLER AREA NETWORK (CAN)
54C-292
STEP 43. Check the CAN_L-side bus line (communication
line including ECUs) of the floor wiring harness for short
to ground. Measure the resistance at intermediate
connector C-22.
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-22, and measure the
resistance at the male side (at floor 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.
(4) Measure the resistance between intermediate connector
terminal 23 and body ground.
OK: 1 k
Ω or more
Q: Does the resistance measure 1 k
Ω or more?
YES : If the resistance measures 1 k
Ω or more, go to Step
NO : If the resistance does not measure 1 k
Ω or more, go
to Step 44.
STEP 44. Check SRS-ECU connector C-121 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: Is SRS-ECU connector C-121 in good condition?
YES : Go to Step 45.
NO : Repair the damaged parts.
AC305233 AI
CONNECTOR: C-22
C-22 (Y)
AC209364IL
MAIL SIDE: C-22
TEST
HARNESS
AC305233 AJ
CONNECTOR: C-121
HARNESS SIDE
C-121 (Y)
48
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
DIAGNOSIS
TSB Revision
CONTROLLER AREA NETWORK (CAN)
54C-293
STEP 45. Check the CAN_L line (communication line only)
between the SRS-ECU connector and the intermediate
connector for a short circuit. Measure the resistance at
intermediate connector C-22.
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-22 and SRS-ECU
connector C-121, and measure the resistance at the male
side of intermediate connector C-22 (at floor 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.
(4) Measure the resistance between intermediate connector
terminal 23 and body ground.
OK: 1 k
Ω or more
Q: Does the resistance measure 1 k
Ω or more?
YES : If the resistance measures 1 k
Ω or more, diagnose
CAN bus lines thoroughly by referring to
NO : If the resistance measures less than 1 k
Ω, repair the
wiring harness between intermediate connector C-22
and SRS-ECU connector.
AC305233 AT
CONNECTORS: C-22, C-121
C-121 (Y)
C-22 (Y)
AC209364IL
MAIL SIDE: C-22
TEST
HARNESS
DIAGNOSIS
TSB Revision
CONTROLLER AREA NETWORK (CAN)
54C-294
STEP 46. Check the CAN_L line (communication line only)
between joint connector (3) and the intermediate
connector for a short circuit. Measure the resistance at
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 intermediate connector C-22 and joint
connector (3) C-02, and measure the resistance at the
wiring harness side of joint connector (3) 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.
(4) Measure the resistance between joint connector (3)
terminals 14 and body ground.
OK: 1 k
Ω or more
CAUTION
Strictly observe the specified wiring harness repair proce-
dure. For details refer to
Q: Does the resistance measure 1 k
Ω or more?
YES : If the resistance measures 1 k
Ω or more, diagnose
CAN bus lines thoroughly by referring to
NO : If the resistance measures less than 1 k
Ω, repair the
wiring harness between intermediate connector C-22
and joint connector (3).
AC305231AP
CONNECTOR: C-02
AC305233 AI
CONNECTOR: C-22
C-22 (Y)
AC209364IK
11
22
10
21
9
20
8
19
7
18
6
17
5
16
4
15
3
14
2
13
1
12
HARNESS SIDE: C-02
TEST
HARNESS
DIAGNOSIS
TSB Revision
CONTROLLER AREA NETWORK (CAN)
54C-295
STEP 47. Check the CAN_L line (communication line
including the multi-center display unit (middle-grade type))
between joint connector (3) and middle-grade multi-center
display connector for short to ground. Measure the
resistance at 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 measure the
resistance at the wiring harness side of joint connector (3)
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.
(4) Measure the resistance between joint connector (3)
terminal 19 and body ground.
OK: 1 k
Ω or more
Q: Does the resistance measure 1 k
Ω or more?
YES : If the resistance measures 1 k
Ω or more, go to Step
NO : If the resistance measures less than 1 k
Ω, go to Step
STEP 48. Check multi-center display unit (middle-grade
type) connector C-05 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: Is multi-center display unit (middle-grade type)
connector C-05 in good condition?
YES : Go to Step 49.
NO : Repair the damaged parts.
AC305231AP
CONNECTOR: C-02
AC209364JI
11
22
10
21
9
20
8
19
7
18
6
17
5
16
4
15
3
14
2
13
1
12
HARNESS SIDE: C-02
TEST HARNESS
AC305233 AF
CONNECTOR: C-05
HARNESS SIDE
C-05 (B)
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