Mitsubishi Montero (2002-2004). Manual — part 1141
M-ASTC DIAGNOSIS
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MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM
35C-181
SYMPTOM PROCEDURES
INSPECTION PROCEDURE 1: When the ignition switch is turned "ON" (Engine stopped or after
startup), the Active skid control system operation indicator light/Active traction control system
operation indicator light does not illuminate.
Active Skid Control System Operation Indicator Light/
Active Traction Control System Operation Indicator Light Circuit
AC204546 AB
CONNECTOR: D-03
D-03 (GR)
AC204547AC
CONNECTORS: D-208, D-210
D-208
D-210
JUNCTION BLOCK
(FRONT VIEW)
M-ASTC DIAGNOSIS
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MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM
35C-182
.
CIRCUIT OPERATION
The Active skid control system operation indicator
light/Active traction control system operation indica-
tor light is connected from the ignition switch (IG1)
through multi-purpose fuse No.6 and the combina-
tion 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 operation indicator light/
Active traction control system operation 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
.
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-183
DIAGNOSIS
Required Special Tool:
• MB991223: Harness Set
STEP 1. Check the Active skid control system operation
indicator light/Active traction control system operation
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 74 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
AC205144AB
CONNECTOR: E-121
HARNESS CONNECTOR:
COMPONENT SIDE
M-ASTC DIAGNOSIS
TSB Revision
MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM
35C-184
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 53 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 53 and terminal 62.
Q: Is the harness wire between combination meter
connector D-03 terminal 53 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
AB
AC205148
CONNECTOR: D-03
COMBINATION
METER SIDE
CONNECTOR
AB
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