Mitsubishi Montero (2004+). Manual — part 1110
M-ASTC DIAGNOSIS
TSB Revision
MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM
35C-151
STEP 22. Check the CAN bus line for open circuit. Measure
at joint connector (9) D-131 and resistor connector D-130.
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 joint connector (9) D-131 and resistor connector
D-130, and measure the resistance between joint connector
(9) and the resistor connector.
(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.
AC204188
CONNECTORS: D-130, D-131
D-131
AQ
HARNESS SIDE
HARNESS SIDE
D-131
D-130
D-130
6
1
9 8
2
7
10
12 11
4
5
3
1
2
M-ASTC DIAGNOSIS
TSB Revision
MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM
35C-152
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 values between joint connector (9)
D-131 terminal 1 and resistor connector D-130 terminal 1,
and between joint connector (9) D-131 terminal 4 and
resistor connector D-130 terminal 2.
• The resistance should measure 2 ohms or less.
CAUTION
If you repair the CAN bus line of the instrument panel wir-
ing harness 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 connected to the G and yaw rate sen-
sor 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 communication
may be caused.
Q: Does the resistance measure 2 ohms or less?
YES : Go to Step 23.
NO : Repair the wiring harness wires between joint
connector (9) and the resistor connector.
AC204582
HARNESS SIDE: D-131
AF
HARNESS SIDE: D-130
TEST
HARNESS
1
2
TEST
HARNESS
6
1
9 8
2
7
10
12 11
4
5
3
AC204582
HARNESS SIDE: D-131
AG
HARNESS SIDE: D-130
TEST
HARNESS
1
2
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-153
STEP 23. Check the CAN bus line for open circuit. Measure
at joint connector (9) D-131 and 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.
(1) Disconnect joint connector (9) D-131 and intermediate
connector E-122, and measure the resistance between joint
connector (9) and the male intermediate connector (at the
instrument 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.
AC204170
CONNECTOR: D-131
AU
COMPONENT
SIDE
4 5
3
12
10
9
11
1 2
6 7 8
AC204176
CONNECTOR: E-122
E-122(L)
MALE SIDE
E-122(L)
AF
1
12
2
13
3
14
4
15
5
16
6
17
7
18
8
19
9
20
10
21
11
22
M-ASTC DIAGNOSIS
TSB Revision
MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM
35C-154
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 values between joint connector (9)
D-131 terminal 6 and intermediate connector E-122
terminal 9, and between joint connector (9) D-131 terminal
11 and intermediate connector E-122 terminal 20.
• The resistance should measure 2 ohms or less.
CAUTION
If you repair the CAN bus line of the instrument panel wir-
ing harness 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 connected to the G and yaw rate sen-
sor 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 communication
may be caused.
Q: Does the resistance measure 2 ohms or less?
YES : Retest the system.
NO : Repair the wiring harness wires between joint
connector (9) and the intermediate connector.
AC204582
MALE CONNECTOR: E122
AJ
HARNESS SIDE: D-131
TEST
HARNESS
TEST
HARNESS
1
12
2
13
3
14
4
15
5
16
6
17
7
18
8
19
9
20
10
21
11
22
6
1
9 8
2
7
10
12 11
4
5
3
AC204582
MALE CONNECTOR: E122
AK
HARNESS SIDE: D-131
TEST
HARNESS
TEST
HARNESS
1
12
2
13
3
14
4
15
5
16
6
17
7
18
8
19
9
20
10
21
11
22
6
1
9 8
2
7
10
12 11
4
5
3
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