Mitsubishi Montero (2002-2004). Manual — part 1143
M-ASTC DIAGNOSIS
TSB Revision
MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM
35C-189
DIAGNOSIS
Required Special Tool:
• MB991223: Harness Set
STEP 1. Check the Active skid control system OFF
indicator light circuit at M-ASTC-ECU connector E-121.
(1) Disconnect M-ASTC-ECU connector E-121 and measure at
the harness side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 82 and ground. It
should be approximately 12 volts (battery positive voltage).
Q: Is the voltage approximately 12 volts (battery positive
voltage)?
YES : Replace the M-ASTC-ECU and then go to Step 6.
NO : Go to Step 2.
AC203901
AC204627AR
CONNECTOR: E-121
E-121
E-121
HARNESS CONNECTOR:
COMPONENT SIDE
AC205144AC
CONNECTOR: E-121
HARNESS CONNECTOR:
COMPONENT SIDE
M-ASTC DIAGNOSIS
TSB Revision
MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM
35C-190
STEP2. Check combination meter connector D-03.
(1) Disconnect combination meter connector D-03 and
measure at the combination meter side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 51 and ground. It
should be approximately 12 volts (battery positive voltage).
Q: Is the voltage approximately 12 volts (battery positive
voltage)?
YES : Go to Step 5.
NO : Go to Step 3.
STEP 3. Check the harness wires between combination
meter connector D-03 terminal 51 and terminal 62.
Q: Is the harness wire between combination meter
connector D-03 terminal 51 and terminal 62 damaged?
YES : Go to Step 4.
NO : Replace the combination meter (printed circuit board)
and go to Step 6.
AC205146
CONNECTOR: D-03
COMBINATION METER
SIDE CONNECTOR
AD
AC205148
CONNECTOR: D-03
COMBINATION
METER SIDE
CONNECTOR
AB
M-ASTC DIAGNOSIS
TSB Revision
MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM
35C-191
STEP 4. Check the harness wires between ignition switch
(IG1) connector D-204 terminal 2 and combination meter
connector D-03 terminal 62.
NOTE: After inspecting combination meter connector D-03,
ignition switch (IG1) connector D-204, junction block connector
D-208 and D-210, inspect the wire. If combination meter con-
nector D-03, ignition switch (IG1) connector D-204, junction
block connector D-208 and D-210 are damaged, repair or
replace them. Refer to GROUP 00E, Harness Connector
Inspection
Q: Is the harness wire between ignition switch (IG1)
connector D-204 terminal 2 and combination meter
connector D-03 terminal 62 damaged?
YES : Go to Step 6.
NO : Replace the combination meter (printed circuit board)
and go to Step 6.
AC204687AD
CONNECTOR: D-03
D-03 (GR)
HARNESS CONNECTOR:
COMPONENT SIDE
AC204709
CONNECTOR: D-204
D-204
AD
2
5
6
3
4
1
HARNESS CONNECTOR:
COMPONENT SIDE
AC204624 AG
CONNECTORS: D-208, D-210
D-208
JUNCTION BLOCK
(FRONT VIEW)
JUNCTION BLOCK CONNECTOR
D-208
D-210
D-210
1 2 3
4
12
9
8
7
6
10
5
13
11
JUNCTION BLOCK CONNECTOR
M-ASTC DIAGNOSIS
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MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM
35C-192
STEP 5. Check the harness wires between combination
meter connector D-03 terminal 51 and M-ASTC-ECU
connector E-121 terminal 82.
NOTE: After inspecting combination meter connector combina-
tion meter connector D-03, intermediate connector E-122 and
M-ASTC-ECU connector E-121, inspect the wire. If combina-
tion meter connector D-03, intermediate connector E-122 and
M-ASTC-ECU connector E-121 are damaged, repair or replace
them. Refer to GROUP 00E, Harness Connector Inspection
. Then go to Step 6.
Q: Is the harness wire between combination meter
connector D-03 terminal 51 and M-ASTC-ECU connector
E-121 terminal 82 damaged?
NO : Go to Step 6.
YES : Repair it and then go to Step 6.
AC204687AD
CONNECTOR: D-03
D-03 (GR)
HARNESS CONNECTOR:
COMPONENT SIDE
AC203901
AC204627AR
CONNECTOR: E-121
E-121
E-121
HARNESS CONNECTOR:
COMPONENT SIDE
AC204548
E-122(L)
AP
CONNECTOR: E-122
2
1
3
13
12
14
21
10
5
4
6
16
15
17
7 8 9
19
18
20
11
22
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