Mitsubishi Galant. Manual — part 524

ANTI-SKID BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM(ABS)

35B-29

STEP 2. Check the ABS warning light relay continuity.
(1) Remove the ABS warning light relay.
(2) Apply the positive terminal to the number 3 terminal, and

then check the continuity between the number 5 terminal
and the number 2 terminal.

Q: Is the ABS warning light relay continuity?

YES : Replace the ABS warning light and then go to Step 7.
NO : Go to Step 3.

STEP 3. Check the power supply circuit at the ABS
warning light relay connector A-10X.
(1) Start the engine.
(2) Measure at the relay box in engine compartment side the

voltage between the terminal 5 and ground.

Q: Is the voltage approximately 12 Volts?

YES : Go to Step 5.
NO : Go to Step 4.

STEP 4. Check the combination meter (ABS warning light)
continuity.
(1) Remove the combination meter. (Refer to GROUP 54,

Combination Meter.)

(2) Check the continuity between terminal number 29

(combination meter side connector C-29) and number 8
(combination meter side connector C-30).

Q: Is the combination meter (ABS warning light) relay

continuity?
YES : Replace the printed circuit board or ABS warning light

bulb then go to Step,7.

NO : Go to Step 6.

STEP 5. Check the harness wire between ABS warning
light relay connector A-10X and ground.
The continuity should exist between terminal 2 or connector A-
10X and ground.

Q: Are any harness wire between ABS warning light relay

connector A-10X and ground damage?
YES : Repair the harness wire then go to Step 7.
NO : Go to Step 5.

AC003917

A-10X (RELAY BOX IN ENGINE
COMPARTMENT)

AB

AC003918

C-29 (COMBINATION
METER SIDE)

C-30 (COMBINATION
METER SIDE)

AB

AC003923 AB

CONNECTOR: A-10X

RELAY BOX IN

ENGINE

COMPARTMENT

ANTI-SKID BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM(ABS)

35B-30

STEP 6. Check the harness wire between ABS warning
light relay connector A-10X and combination meter
connector C-30 or check the harness wire between ignition
switch (IG1) and combination meter connector C-29.
NOTE: After inspecting intermediate connector C-66, C-73 or
C-78 inspect the wire. If intermediate connector C-66,C-73 or
C-78 is damaged, repair or replace it. Refer to GROUP 00E,
Harness Connector Inspection

P.00E-2

. If the connector has

been repaired or replaced, go to Step 7.

Q: Are any harness wire between ABS warning light relay

connector A-10X and combination meter connector C-
30 or check the harness wire between ignition switch
(IG1) and combination meter connector C-29 damage?
YES : Repair the harness wire then go to Step 7.
NO : Go to Step 5.

AC003923 AB

CONNECTOR: A-10X

RELAY BOX IN

ENGINE

COMPARTMENT

AC003922AB

CONNECTORS: C-29, C-30

C-30

C-29

AC003870 AB

CONNECTOR: C-66

CONNECTOR
BLOCK (LH)

AC003082 AM

CONNECTORS: C-73, C-78

C-73

C-78

JUNCTION BLOCK
(FRONT VIEW)

ANTI-SKID BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM(ABS)

35B-31

STEP 7. Check symptoms

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 : This diagnosis 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
(ABS-ECU power supply is normal) and no
diagnostic trouble code outputs.

ANTI-SKID BRAKING SYSTEM (ABS) DIAGNOSIS

TSB Revision

ANTI-LOCK BRAKING SYSTEM(ABS)

35B-32

AC003995

ABS Warning Light Power Supply Circuit

AB