Mitsubishi Galant. Manual — part 523
ANTI-SKID BRAKING SYSTEM (ABS) DIAGNOSIS
TSB Revision
ANTI-LOCK BRAKING SYSTEM(ABS)
35B-25
STEP 3. Check the harness wire between ABS-ECU
connector A-03 and data link connector C-23.
NOTE: After inspecting intermediate connector C-12 or C-57,
inspect the wire. If intermediate connector C-12 or C-57 is
damaged, repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. If the connector has been
repaired or replaced, go to Step 4.
Q: Is any harness wire between ABS-ECU connector A-03
and data link connector C-23 damaged?
YES : Repair them and go to Step 5.
NO : Go to Step 4.
AC003695 AB
CONNECTOR: A-03
AC003089 AB
CONNECTOR: C-23
AC003131 AB
CONNECTOR: C-12
AC003089AE
CONNECTOR: C-57
ANTI-SKID BRAKING SYSTEM (ABS) DIAGNOSIS
TSB Revision
ANTI-LOCK BRAKING SYSTEM(ABS)
35B-26
STEP 4. Check the harness wires between ABS-ECU
connector A-03 and ground.
Q: Are any harness wires between ABS-ECU connector A-
03 and ground damaged?
YES : Repair them and then go to Step 5.
NO : Go to Step 5.
STEP 5. Check symptoms
Q: Does the scan tool communicate with the ABS system?
YES : This diagnosis is complete.
NO : Return to Step 1.
AC003695 AB
CONNECTOR: A-03
ANTI-SKID BRAKING SYSTEM (ABS) DIAGNOSIS
TSB Revision
ANTI-LOCK BRAKING SYSTEM(ABS)
35B-27
INSPECTION PROCEDURE 2: When the ignition switch is turned "ON" (engine stopped), the ABS
warning light does not illuminate.
AC003925AB
ABS Warning Light Power Supply and Ground Circuit
ANTI-SKID BRAKING SYSTEM (ABS) DIAGNOSIS
TSB Revision
ANTI-LOCK BRAKING SYSTEM(ABS)
35B-28
CIRCUIT OPERATION
The ABS warning light power is supplied from the
ignition switch.
TECHNICAL DESCRIPTION (COMMENT)
The cause may be: an open circuit in the ABS
warning light power supply circuit, a blown ABS
warning light bulb or ABS warning light relay.
TROUBLESHOOTING HINTS (The most likely
causes for this condition:)
•
Blown fuse
•
Damaged wring harness or connector
•
Burnt out ABS warning light bulb
•
Malfunction of the ABS warning light relay
DIAGNOSIS
Required Special Tool:
•
MB991223: Harness Set
STEP 1. Check the ABS warning light relay continuity.
(1) Remove the ABS warning light relay.
(2) Check the continuity between terminal number 1 and
number 3 and between terminal number 5 and number 2 at
the ABS warning light relay.
Q: Is the ABS warning light relay continuity?
YES : Go to Step 2.
NO : Replace the ABS warning light and then go to Step 7.
AC003923 AB
CONNECTOR: A-10X
RELAY BOX IN
ENGINE
COMPARTMENT
AC003870 AB
CONNECTOR: C-66
CONNECTOR
BLOCK (LH)
AC003922AB
CONNECTORS: C-29, C-30
C-30
C-29
AC003082 AM
CONNECTORS: C-73, C-78
C-73
C-78
JUNCTION BLOCK
(FRONT VIEW)
AC003921
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