Mitsubishi Montero (2004+). Manual — part 1065
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
TSB Revision
ANTI-LOCK BRAKING SYSTEM (ABS)
35B-103
.
CIRCUIT OPERATION
The ABS warning light power is supplied from the
ignition switch. The M-ASTC-ECU grounds the circuit
to illuminate the light. The light also illuminates when
the valve relay is switched to OFF.
.
TECHNICAL DESCRIPTION (COMMENT)
The short circuit of ABS warning light circuit is con-
sidered to be the cause. The failure of valve relay
OFF can be suspected as the cause, but in this case
DTC 52 would be output.
.
TROUBLESHOOTING HINTS
• Damaged wiring harness
• Malfunction of M-ASTC-ECU
.
DIAGNOSIS
Required Special Tool:
• MB991223: Harness Set
AC204546 AB
CONNECTOR: D-03
D-03 (GR)
AC203901AF
CONNECTOR: E-120
E-120
AC204385
CONNECTORS: E-108, E-110
AE
E-110
E-108(B)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
TSB Revision
ANTI-LOCK BRAKING SYSTEM (ABS)
35B-104
STEP 1. Check the ABS warning light circuit at
M-ASTC-ECU connector E-120.
(1) Disconnect M-ASTC-ECU connector E-120.
(2) Remove the valve relay.
(3) Turn the ignition switch to the "ON" position. The ABS
warning light goes out.
Q: Does the ABS warning light go out?
YES : Replace the M-ASTC-ECU and then go to Step 4.
NO : Go to Step 2.
AC203901
AC204627AG
CONNECTOR: E-120
E-120
HARNESS CONNECTOR:
COMPONENT SIDE
E-120
AC204674
AC
VALVE RELAY
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
TSB Revision
ANTI-LOCK BRAKING SYSTEM (ABS)
35B-105
STEP2. Check the harness wire between combination
meter connector D-03 terminal 56 and M-ASTC-ECU
connector E-120 terminal 62.
Q: Is the harness wire between combination meter
connector D-03 terminal 62 and M-ASTC-ECU connector
E-120 terminal 62 damaged?
YES : Repair it and then go to Step 4.
NO : Go to Step 3.
AC204690 AC
CONNECTOR: D-03
D-03 (GR)
HARNESS CONNECTOR:
COMPONENT SIDE
D-03
AC203901
AC204627AG
CONNECTOR: E-120
E-120
HARNESS CONNECTOR:
COMPONENT SIDE
E-120
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
TSB Revision
ANTI-LOCK BRAKING SYSTEM (ABS)
35B-106
STEP 3. Check the harness wires between combination
meter connector D-03 terminal 56 and valve relay
connector B-21X terminal 2.
Q: Is the harness wire between combination meter
connector D-03 terminal 56 and valve relay connector
B-21X terminal 2 damaged?
YES : Repair it and then go to Step 4.
NO : Replace the combination meter (printed circuit board)
and go to Step 4.
STEP 4. Retest the system.
Q: Does the ABS warning light turn off 3 seconds after
start-up?
YES : The procedure is complete.
NO : Return to Step 1.
AC204690 AC
CONNECTOR: D-03
D-03 (GR)
HARNESS CONNECTOR:
COMPONENT SIDE
D-03
AC204706
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
5
B-21X
CONNECTOR: B-21X
AB
RELAY BOX CONNECTOR
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