Mitsubishi Montero (2004+). Manual — part 1122
M-ASTC DIAGNOSIS
TSB Revision
MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM
35C-199
STEP 3. 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 4.
Q: Is the harness wire between combination meter
connector D-03 terminal 51 and M-ASTC-ECU connector
E-121 terminal 82 damaged?
YES : Repair it and then go to Step 4.
NO : Replace the combination meter (printed circuit board),
and then go to Step 4.
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
M-ASTC DIAGNOSIS
TSB Revision
MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM
35C-200
STEP 4. Retest the system.
Q: When the ignition switch is turned "ON" (engine
stopped or after startup), does the Active skid control
system OFF indicator light illuminate?
YES : The procedure is complete.
NO : Return to Step 1.
INSPECTION PROCEDURE 3: The Active skid control system operation indicator light/Active traction
control system operation indicator light remains illuminated after the engine is started.
Active Skid Control System Operation Indicator Light/
Active Traction Control System Operation Indicator Light Circuit
M-ASTC DIAGNOSIS
TSB Revision
MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM
35C-201
.
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 Active skid
control system operation indicator light/Active trac-
tion control system operation indicator light circuit.
.
TROUBLESHOOTING HINTS (The most likely
causes for this condition:)
• Damaged wiring harness
• 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-202
STEP 1. Check the Active skid control system operation
indicator light/Active traction control system operation
indicator light drive circuit at M-ASTC-ECU connector
E-121 terminal.
(1) Disconnect M-ASTC-ECU connector E-121.
(2) Turn the ignition switch to the "ON" position.
Q: Does the indicator light turn off?
YES : Replace the M-ASTC-ECU and then go to Step 3.
NO : Go to Step 2.
AC203901
AC204627AR
CONNECTOR: E-121
E-121
E-121
HARNESS CONNECTOR:
COMPONENT SIDE
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