Mitsubishi Montero (2004+). Manual — part 1112
M-ASTC DIAGNOSIS
TSB Revision
MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM
35C-159
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: Is the resistance infinite?
YES : Go to Step 28.
NO : Repair the wiring harness wires between joint
connector (9) and the steering wheel sensor
connector.
M-ASTC DIAGNOSIS
TSB Revision
MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM
35C-160
STEP 28. Check the CAN bus line for short circuit. Measure
at joint connector (9) D-131.
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 intermediate
connector E-122, and measure the resistance at joint
connector (9).
(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.
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
terminals 6 and 11.
• The resistance should be infinite.
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: Is the resistance infinite?
AC204170
CONNECTOR: D-131
AT
6
1
9 8
2
7
10
12 11
4
5
3
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
AC204738
HARNESS SIDE: D-131
TEST
HARNESS
EN
6
1
9 8
2
7
10
12 11
4
5
3
TEST
HARNESS
M-ASTC DIAGNOSIS
TSB Revision
MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM
35C-161
YES : Retest the system.
NO : Repair the wiring harness wires between joint
connector (9) and the intermediate connector.
STEP 29. Check steering wheel sensor connector D-225.
CAUTION
If there is a problem in the connector(s) (including termi-
nals) or wire(s) of the instrument panel wiring 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 har-
ness connected to the G and yaw rate sensor connector
and intermediate connector E-123), cut and repair the
defective wire so that the frayed end of the twisted wire
should be within 10 cm (4.0 inches). If it exceeds 10 cm (4.0
inches), twist the wiring harness just like the original
twisted wire. If the frayed end exceeds 10 cm (4.0 inches),
a communication error may be caused.
Q: Is steering wheel sensor connector D-225 in good
condition?
YES : Replace the steering wheel sensor.
NO : Repair or replace the connector(s).
AC204172
CONNECTOR: D-225
HARNESS SIDE
AD
3 2
1
4
5
AC203824
CONNECTOR
TWISTED WIRE
AB
10 cm
(4.0 inches)
M-ASTC DIAGNOSIS
TSB Revision
MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM
35C-162
STEP 30. Check the terminator resistor inside the
M-ASTC-ECU. 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 connector E-122, and measure the
resistance at the female intermediate connector (control
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.
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 intermediate connector
E-122 terminals 9 and 20.
• The resistance should measure 120 ± 12 ohms.
Q: Does the resistance measure 120
± 12 ohms?
YES : Retest the system.
NO (If the resistance is infinite) : Replace the control
wiring harness assembly.
NO (If the resistance measures 2 ohms or less) : Go to
Step 31.
AC204176
CONNECTOR: E-122
E-122(L)
FEMALE SIDE
E-122(L)
AG
11
22
10
21
9
20
8
19
7
18
6
17
5
16
4
15
3
14
2
13
1
12
AC204581
FEMALE CONNECTOR: E-122
TEST
HARNESS
AD
TEST
HARNESS
11
22
10
21
9
20
8
19
7
18
6
17
5
16
4
15
3
14
2
13
1
12
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