Mitsubishi Galant 9G. Manual — part 1291
DIAGNOSIS
TSB Revision
CONTROLLER AREA NETWORK (CAN)
54C-268
STEP 12. Check the CAN_H line (communication line
including the A/C-ECU) between joint connector (3) and
the A/C-ECU 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 6 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 13. Check A/C-ECU connector C-15 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 A/C-ECU connector C-15 in good condition?
YES : Go to Step 14.
NO : Repair the damaged parts.
AC305231AP
CONNECTOR: C-02
AC209364
11
22
10
21
9
20
8
19
7
18
6
17
5
16
4
15
3
14
2
13
1
12
AC209364
AC209364
AC209364
AC209364
AC209364
AC209364JH
HARNESS SIDE: C-02
TEST
HARNESS
AC305233 AH
CONNECTOR: C-15
HARNESS SIDE
C-15 (B)
DIAGNOSIS
TSB Revision
CONTROLLER AREA NETWORK (CAN)
54C-269
STEP 14. Check the CAN_H line (communication line only)
between joint connector (3) and A/C-ECU 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 A/C-ECU
connector C-15, 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 6 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 joint connector (3) and the
A/C-ECU connector.
AC305231AP
CONNECTOR: C-02
AC305233 AH
CONNECTOR: C-15
HARNESS SIDE
C-15 (B)
AC209364
11
22
10
21
9
20
8
19
7
18
6
17
5
16
4
15
3
14
2
13
1
12
AC209364
AC209364
AC209364
AC209364
AC209364
AC209364JH
HARNESS SIDE: C-02
TEST
HARNESS
DIAGNOSIS
TSB Revision
CONTROLLER AREA NETWORK (CAN)
54C-270
STEP 15. Check the CAN_H line (communication line
including the SRS-ECU) between joint connector (3) and
the SRS-ECU 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)
terminals 3 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 16. Check intermediate connector C-22 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 intermediate connector C-22 in good condition?
YES : Go to Step 17.
NO : Repair the damaged parts.
AC305231AP
CONNECTOR: C-02
AC209364
11
22
10
21
9
20
8
19
7
18
6
17
5
16
4
15
3
14
2
13
1
12
AC209364
AC209364
AC209364
AC209364
AC209364
AC209364HZ
HARNESS SIDE: C-02
TEST
HARNESS
AC305233 AI
CONNECTOR: C-22
C-22 (Y)
DIAGNOSIS
TSB Revision
CONTROLLER AREA NETWORK (CAN)
54C-271
STEP 17. Check the CAN_H-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 22 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 18.
STEP 18. 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 19.
NO : Repair the damaged parts.
AC305233 AI
CONNECTOR: C-22
C-22 (Y)
AC209364IA
MAIL SIDE: C-22
TEST
HARNESS
AC305233 AJ
CONNECTOR: C-121
HARNESS SIDE
C-121 (Y)
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