Mitsubishi Galant 9G. Manual — part 1294
DIAGNOSIS
TSB Revision
CONTROLLER AREA NETWORK (CAN)
54C-280
STEP 28. Check the CAN_H line (communication line only)
between the powertrain control module connector and
ABS-ECU connector for short to ground. Measure the
resistance at powertrain control module connector B-19.
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 powertrain control module connector B-19 and
ABS-ECU connector A-02, and measure the resistance at
the harness side of powertrain control module connector
B-19.
(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.
AC305206
CONNECTOR: A-02
AG
A-02 (GR)
HARNESS SIDE
AC306248AD
B-19 (B)
CONNECTOR: B-19
PCM
AIR
CLEANER
HARNESS SIDE
DIAGNOSIS
TSB Revision
CONTROLLER AREA NETWORK (CAN)
54C-281
(4) Measure the resistance between powertrain control module
connector terminal 17 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, go to Step
NO : If the resistance measures less than 1 k
Ω, repair the
wiring harness between powertrain control module
connector and ABS-ECU connector.
STEP 29. Check the CAN_H line inside the ABS-ECU for
short to ground. Measure the resistance at ABS-ECU
connector A-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 ABS-ECU connector A-02.
AC209364
HARNESS SIDE: B-19
TEST
HARNESS
AC209364IE
AC305206
CONNECTOR: A-02
AG
A-02 (GR)
HARNESS SIDE
DIAGNOSIS
TSB Revision
CONTROLLER AREA NETWORK (CAN)
54C-282
(2) Connect special tool MB991970 (ABS check harness) to
the ABS-ECU and the wiring harness, and measure the
resistance at special tool MB991970 (ABS check harness).
(3) Turn the ignition switch to the "LOCK" (OFF) position.
CAUTION
Disconnect the negative battery terminal. For details refer
to
(4) Disconnect the negative battery terminal.
(5) Measure the resistance between special tool MB991970
(ABS check harness) connector terminal 25 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, replace the
ABS-ECU.
STEP 30. Check intermediate connector C-29 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-29 in good condition?
YES : Go to Step 31.
NO : Repair the damaged parts.
AC209767
SPECIAL TOOL
MB991970
ABS-
ECU
SPECIAL TOOL MB991970
CONNECTOR
AE
2
19
1
18
25
8
15
16
17
27
28
26
11
9
10
12
13
14
23
24
22 21
7
6
5
4
20
3
MEASUREMENT CONNECTOR
AC305231AI
CONNECTOR: C-29
DIAGNOSIS
TSB Revision
CONTROLLER AREA NETWORK (CAN)
54C-283
STEP 31. Check the CAN_L-side bus line (communication
line including ECUs) of the front wiring harness for short
to ground. Measure the resistance at intermediate
connector C-29.
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-29, and measure the
resistance at the male side (at front 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 12 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
AC305231AI
CONNECTOR: C-29
AC209364
2 3
27
32
28
33
16
15
4 5
19
18
29
17
34
7 8
35
22
21
9 10
30
36
31
37
25
24
23
6
20
1
14
26
11
13
12
38
MALE SIDE: C-29
TEST HARNESS
GA
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