Mitsubishi 380. Manual — part 697
DIAGNOSIS
CONTROLLER AREA NETWORK (CAN)
54C-198
STEP 13. Check A/C-ECU connector C-15 automatic air
conditioning system 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 automatic air conditioning
system in good condition?
YES : Go to Step 14.
NO : Repair the damaged parts.
16DB477A
C-15 HARNESS SIDE
CONNECTOR: C-15
C-15 (B)
DIAGNOSIS
CONTROLLER AREA NETWORK (CAN)
54C-199
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 automatic air conditioning system, 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.
16DB408A
CONNECTOR: C-02
16DB477A
C-15 HARNESS SIDE
CONNECTOR: C-15
C-15 (B)
DIAGNOSIS
CONTROLLER AREA NETWORK (CAN)
54C-200
(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.
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
18 .
NO : If the resistance measures less than 1 k
Ω, go to Step
16.
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
16DB408A
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
DIAGNOSIS
CONTROLLER AREA NETWORK (CAN)
54C-201
STEP 16. 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 17.
NO : Repair the damaged parts.
STEP 17. Check the CAN_ H line (communication line only)
between the SRS-ECU connector and joint connector for a
short circuit. Measure the resistance at joint connector
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 C-02 and SRS-ECU connector
C-121, and measure the resistance at the wiring harness
side of joint connector 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.
16DB478A
CONNECTOR: C-121
HARNESS SIDE
C-121 (Y)
48
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16DB408A
CONNECTOR: C-02
16DB478A
CONNECTOR: C-121
HARNESS SIDE
C-121 (Y)
48
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