Mitsubishi Montero (2004+). Manual — part 1121
M-ASTC DIAGNOSIS
TSB Revision
MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM
35C-195
STEP 4. Retest the system.
Q: When the ignition switch is turned "ON" (engine
stopped or after startup), does the Active skid control
system operation indicator light/Active traction control
system operation indicator light illuminate?
YES : The procedure is complete.
NO : Return to Step 1.
INSPECTION PROCEDURE 2: When the ignition switch is tured "ON" (Engine stopped or after
startup), the Active skid control system OFF indicator light does not illuminate.
Active Skid Control System OFF Indicator Light Circuit
M-ASTC DIAGNOSIS
TSB Revision
MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM
35C-196
.
CIRCUIT OPERATION
The Active skid control system OFF indicator light is
connected from the ignition switch (IG1) through
multi-purpose fuse No.6 and the combination meter
to the M-ASTC-ECU. The M-ASTC-ECU turns on
and off the indicator light.
.
TECHNICAL DESCRIPTION (COMMENT)
This symptom is caused by a shorted or opened
Active skid control system OFF indicator light circuit.
.
TROUBLESHOOTING HINTS (The most likely
causes for this condition:)
• Damaged wiring harness
• Burned-out bulb
• Melted fuse
• Malfunction of M-ASTC-ECU
.
DIAGNOSIS
Required Special Tool:
• MB991223: Harness Set
AC204546 AB
CONNECTOR: D-03
D-03 (GR)
AC204547AC
CONNECTORS: D-208, D-210
D-208
D-210
JUNCTION BLOCK
(FRONT VIEW)
AC203901AG
CONNECTOR: E-121
E-121
AC204548
E-122
AO
CONNECTOR: E-122
M-ASTC DIAGNOSIS
TSB Revision
MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM
35C-197
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 4.
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-198
STEP 2. 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
. Then go to Step 4.
Q: Is the harness wire between ignition switch (IG1)
connector D-204 terminal 2 and combination meter
connector D-03 terminal 62 damaged?
YES : Repair the wiring harness wires between ignition
switch (IG1) connector D-204 terminal 2 and
combination meter connector D-03 terminal 62, and
then go to Step 4.
NO : Go to Step 3.
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
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