Mitsubishi Montero (2002-2004). Manual — part 1123
M-ASTC DIAGNOSIS
TSB Revision
MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM
35C-109
STEP 14. Check the resistance in the CAN_H line. Measure at
joint connector (9) D-131.
CAUTION
Before checking CAN bus lines and their interconnected compo-
nents, "ground" yourself, by touching a metal object such as an
unpainted pipe, this will discharge any potentially damaging
static that may have built up.
CAUTION
When measuring resistance value or voltage in CAN bus lines,
use a digital multimeter. If not using a digital multimeter, the
equipments, which are connected through the CAN communica-
tion lines, may be damaged.
(1) Disconnect joint connector (9) D-131 and intermediate connector
E-122, and measure the resistance between joint connector (9)
and body ground.
(2) Turn the ignition switch to the LOCK (OFF) position.
CAUTION
Disconnect the negative battery terminal when measuring the
resistance value in the CAN bus line. If you fail to do so, the
equipments, which are connected through the CAN communica-
tion lines, may be damaged.
(3) Disconnect the negative battery terminal.
CAUTION
Always use the test harness when measuring the voltage or
resistance value at the female connector. If you fail to do so,
connectors may be damaged.
(4) Measure the resistance between joint connector (9) D-131
terminal 6 and body ground.
• The resistance should be infinite.
CAUTION
If you repair the CAN bus line of the instrument panel wiring har-
ness assembly (the wiring harness connected to the steering
wheel sensor, the data link connector and the resistor) and the
transmission wiring harness assembly (the wiring harness con-
nected to the G and yaw rate sensor connector and intermediate
connector E-123), observe the precautions regarding how to
repair wiring harness. If a new wire is added or a splice point is
modified for the CAN_L or CAN_H line, an error in the CAN com-
munication may be caused.
Q: Is the resistance infinite?
YES : Retest the system.
NO : Repair the wiring harness wires between joint connector (9)
and the intermediate connector.
AC204170
CONNECTOR: D-131
AT
6
1
9 8
2
7
10
12 11
4
5
3
AC204176
CONNECTOR: E-122
E-122(L)
E-122(L)
AD
1
12
2
13
3
14
4
15
5
16
6
17
7
18
8
19
9
20
10
21
11
22
AC204581
HARNESS SIDE: D-131
AP
TEST
HARNESS
6
1
9 8
2
7
10
12 11
4
5
3
M-ASTC DIAGNOSIS
TSB Revision
MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM
35C-110
STEP 15. Measure the voltage in the CAN_H line. Check at
intermediate connector E-122.
CAUTION
Before checking CAN bus lines and their interconnected
components, "ground" yourself, by touching a metal
object such as an unpainted pipe, this will discharge any
potentially damaging static that may have built up.
CAUTION
When measuring resistance value or voltage in CAN bus
lines, use a digital multimeter. If not using a digital multim-
eter, the equipments, which are connected through the
CAN communication lines, may be damaged.
(1) Disconnect intermediate connectors E-122, E-123, and M-
ASTC-ECU connector E-121, power control module
connector D-134, and measure the voltage at the female
intermediate connector (control panel wiring harness side).
(2) Turn the ignition switch to the "ON" position.
AC204171
CONNECTOR: D-134
HARNESS SIDE
D-134(GR)
D-134(GR)
AE
80
87
73
66
67
65
74
81
75
82
6261
72
68
69
70
71
78
85
77
8483
76
79
86
63
64
8988
AC204194
CONNECTORS: E-121, E-122, E-123
E-123(GR)
E-123(GR)
E-122(L)
E-121
HARNESS SIDE
AK
E-121
E-122(L)
2
6
14
7
9 8
10
4
12
3
11
19
16
1817
15
1
5
13
1
12
2
13
3
14
4
15
5
16
6
17
7
18
8
19
9
20
10
21
11
22
71
77
83
72
78
84
73
79
85
74
80
75
81
86
76
82
87
M-ASTC DIAGNOSIS
TSB Revision
MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM
35C-111
CAUTION
Always use the test harness when measuring the voltage
or resistance value at the female connector. If you fail to do
so, connectors may be damaged.
(3) Measure the voltage between intermediate connector E-
122 terminal 9 and body ground.
• The voltage should measure one volt or less.
Q: Do the voltage measure one volt or less?
YES : Go to Step 16.
NO : Replace the control wiring harness assembly.
AC204580
FEMALE CONNECTOR: E-122
AD
11
22
10
21
9
20
8
19
7
18
6
17
5
16
4
15
3
14
2
13
1
12
TEST
HARNESS
M-ASTC DIAGNOSIS
TSB Revision
MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM
35C-112
STEP 16. Check the resistance in the CAN_H line. Check at
intermediate connector E-122.
CAUTION
Before checking CAN bus lines and their interconnected
components, "ground" yourself, by touching a metal
object such as an unpainted pipe, this will discharge any
potentially damaging static that may have built up.
CAUTION
When measuring resistance value or voltage in CAN bus
lines, use a digital multimeter. If not using a digital multim-
eter, the equipments, which are connected through the
CAN communication lines, may be damaged.
(1) Disconnect intermediate connectors E-122, E-123, and M-
ASTC-ECU connector E-121, power control module
connector D-134, and measure the resistance at the female
intermediate connector (control panel wiring harness side).
(2) Turn the ignition switch to the LOCK (OFF) position.
CAUTION
Disconnect the negative battery terminal when measuring
the resistance value in the CAN bus line. If you fail to do
so, the equipments, which are connected through the CAN
communication lines, may be damaged.
(3) Disconnect the negative battery terminal.
AC204171
CONNECTOR: D-134
HARNESS SIDE
D-134(GR)
D-134(GR)
AE
80
87
73
66
67
65
74
81
75
82
6261
72
68
69
70
71
78
85
77
8483
76
79
86
63
64
8988
AC204194
CONNECTORS: E-121, E-122, E-123
E-123(GR)
E-123(GR)
E-122(L)
E-121
HARNESS SIDE
AK
E-121
E-122(L)
2
6
14
7
9 8
10
4
12
3
11
19
16
1817
15
1
5
13
1
12
2
13
3
14
4
15
5
16
6
17
7
18
8
19
9
20
10
21
11
22
71
77
83
72
78
84
73
79
85
74
80
75
81
86
76
82
87
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