Mitsubishi Galant (2004+). Manual — part 442
DIAGNOSIS
TSB Revision
CONTROLLER AREA NETWORK (CAN)
54C-379
STEP 11. Check the ETACS-ECU for short circuit. Measure
the resistance at ETACS-ECU connector C-218.
CAUTION
A digital multimeter should be used. For details refer to
(1) Disconnect ETACS-ECU connector C-218, and measure
the resistance at the component side of ETACS-ECU
connector C-218.
(2) Measure the resistance between ETACS-ECU connector
terminals 72 and 73.
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
ETACS-ECU.
AC305413
C-218 (GR)
CONNECTOR: C-218
AI
HARNESS SIDE
JUNCTION BLOCK
(REAR VIEW)
68
74
63
66
72
73
67
65 64
61
70
71
62
69
60
57
58
59
56 55
52
54 53
51
AC209438
COMPONENT SIDE: C-218
AO
TEST
HARNESS
5859
74
68
57
56
72
656667
73
54
63
52
70
61
53
62
71
64
55
51
60
69
TEST
HARNESS
DIAGNOSIS
TSB Revision
CONTROLLER AREA NETWORK (CAN)
54C-380
STEP 12. Check the CAN_L and H lines (communication
lines including the A/C-ECU) between joint connector (3)
and the A/C-ECU 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 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 6 and 17.
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
16 .
NO : If the resistance measures less than 1 k
Ω, go to Step
13.
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
AC209438
AC209438
TEST
HARNESS
AS
TEST
HARNESS
1110 9 8 7 6 5 4 3 2 1
22 21201918 1716 15 14 1312
HARNESS SIDE: C-02
AC305233 AH
CONNECTOR: C-15
HARNESS SIDE
C-15 (B)
DIAGNOSIS
TSB Revision
CONTROLLER AREA NETWORK (CAN)
54C-381
STEP 14. Check the CAN_L and H lines (communication
lines only) between joint connector (3) and the A/C-ECU 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 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)
terminals 6 and 17.
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, go to Step
15 .
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)
AC209438
AC209438
TEST
HARNESS
AS
TEST
HARNESS
1110 9 8 7 6 5 4 3 2 1
22 21201918 1716 15 14 1312
HARNESS SIDE: C-02
DIAGNOSIS
TSB Revision
CONTROLLER AREA NETWORK (CAN)
54C-382
STEP 15. Check the A/C-ECU for short circuit. Measure the
resistance at A/C-ECU connector C-15.
CAUTION
A digital multimeter should be used. For details refer to
(1) Disconnect A/C-ECU connector C-15, and measure the
resistance at the component side of A/C-ECU connector
C-15.
(2) Measure the resistance between A/C-ECU connector
terminals 14 and 15.
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
A/C-ECU.
AC305233 AH
CONNECTOR: C-15
HARNESS SIDE
C-15 (B)
AC209438
AC209438
COMPONENT SIDE: C-15
AY
TEST
HARNESS
TEST
HARNESS
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