Mitsubishi Galant 9G. Manual — part 1318
DIAGNOSIS
TSB Revision
CONTROLLER AREA NETWORK (CAN)
54C-376
STEP 19. Check the CAN_L and H lines (communication
lines 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.
AC305234AC
CONNECTORS: C-22, C-121
C-121 HARNESS SIDE
C-121 (Y)
C-22 (Y)
C-22
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DIAGNOSIS
TSB Revision
CONTROLLER AREA NETWORK (CAN)
54C-377
(4) Measure the resistance between intermediate connector
terminals 22 and 23.
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, repair the
wiring harness between intermediate connector C-22
and SRS-ECU connector.
STEP 20. 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 21.
NO : Repair the damaged parts.
AC204582
AC204582CS
MALE SIDE: C-22
TEST
HARNESS
TEST HARNESS
AC305233 AJ
CONNECTOR: C-121
HARNESS SIDE
C-121 (Y)
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DIAGNOSIS
TSB Revision
CONTROLLER AREA NETWORK (CAN)
54C-378
STEP 21. Check the SRS-ECU for short circuit. Measure
the resistance at SRS-ECU connector C-121.
CAUTION
A digital multimeter should be used. For details refer to
.
(1) Disconnect SRS-ECU connector C-121, and measure the
resistance at the component side of SRS-ECU connector
C-121.
(2) Measure the resistance between SRS-ECU connector
terminals 32 and 43.
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, replace the
SRS-ECU.
AC305233 AJ
CONNECTOR: C-121
HARNESS SIDE
C-121 (Y)
48
21
22
23
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31
32
33
34
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AC209438
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AC209438
TEST
HARNESS
AU
TEST
HARNESS
COMPONENT SIDE: C-121
DIAGNOSIS
TSB Revision
CONTROLLER AREA NETWORK (CAN)
54C-379
STEP 22. Check the CAN_L and H lines (communication
lines 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 3 and 14.
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)
AC209438
11
22
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3
14
2
13
1
12
TEST
HARNESS
AV
TEST
HARNESS
HARNESS SIDE: C-02
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