Mitsubishi Montero (2002-2004). Manual - part 1056

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-95

STEP 7. Check the combination meter power supply circuit 
at combination meter connector D-03.
(1) Disconnect the combination meter connector D-03, and 

measure at the harness side.

(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 62 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 8.
NO :  Go to Step 9.

STEP 8. Check the combination meter connector D-03.
Q: Is the connector damaged?

YES : Repair it and then go to Step 10.
NO :  Replace the combination meter (printed circuit board) 

and go to Step 10.

AC204690AE

CONNECTOR: D-03

D-03 (GR)

HARNESS CONNECTOR: 
COMPONENT SIDE

AC204690 AB

COMBINATION METER 
CONNECTOR

D-03

CONNECTOR: D-03

D-03 (GR)

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-96

STEP 9. Check the harness wires between ignition switch 
(IG1) connector D-204 terminal 2 and combination meter 
connector D-03 terminal 62.
NOTE: After inspecting junction block connectors D-208 and D-
210, inspect the wire. If junction block connectors D-208 and D-
210 are damaged, repair or replace them. Refer to GROUP 
00E, Harness Connector Inspection 

P.00E-2

. If the connector 

has been repaired or replaced, go to Step 10.
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 it and then go to Step 10.
NO :  Go to Step 10.

AC204709

CONNECTOR: D-204

D-204

AC

2
5

6

3

4

1

HARNESS
CONNECTOR:
COMPONENT
SIDE

AC204690 AC

CONNECTOR: D-03

D-03 (GR)

HARNESS CONNECTOR: 
COMPONENT SIDE

D-03

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

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-97

STEP 10. Retest the system.
Q: Does the ABS warning light illuminate for 3 seconds 

when the ignition switch is turned to the "ON" position 
with engine stopped or upon start-up?
YES : The procedure is complete.
NO :  Return to Step 1.

INSPECTION PROCEDURE 3: The ABS Warning Light Remains Illuminated after the Engine is Started.

NOTE: This diagnosis procedure is limited to cases where communication with the scan tool is possible (M-
ASTC-ECU power supply is normal) and no diagnostic trouble code outputs.

AC204875AB

ABS Warning Light Circuit

AC204674

AB

B-21X (VALVE RELAY)

CONNECTOR: B-21X

AC204547AC

CONNECTORS: D-208, D-210

D-208

D-210

JUNCTION BLOCK
(FRONT VIEW)

ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM (ABS)

35B-98

.

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

.

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)