Mitsubishi 1989-1993 GALANT Service Manual page 1137

SERVICE BRAKES
TROUBLESHOOTING (ABS-FWD)
Confirm condition in the following way and diagnose accordingly.
1) When the ignition key is turned to the "ON"
position, the ABS warning light blinks twice for
approximately 1 second due to the ABS ECU (as
a self check of the valve relays is performed),
and goes out and stays out.
2) With the ignition key in the "START" position,
ABS warnmg/;,ght
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No. Trouble condition
ABS warning light does not light up at all.
ON
ABS
OFF
1
I
When the ignition key is turned to the
"ON" position, it remains lighted.
ABS
light
2
ACC. LOi+
Does not illuminate when ignition key is
in "START" position.
ABS
3
Ignition
System Troubleshooting
power to the ABS ECU is interrupted and the
ABS warning light remains lit because the valve
relay is OFF.
(3) When the ignition key is turned from the "START'
position to the "ON" position, the ABS warning
light blinks twice for approximately 1 second
(during this time a recheck of the valve relays is
performed), and then goes out and stays out.
light
Ignition
I
No
Major causes
ABS warning light bulb is burnt out.
l
Open in ABS warning light electrical
l
circuit (check for blown fuse)
14 A0590
Fail safe is functioning due to ECU on-
l
board diagnostic
Short in ECU warning light drive circuit
l
Malfunction of ECU
l
Malfunction of valve relay
l
Break in harness between ABS warn-
l
ing light and HU
Break in harness between HU and
l
body ground
OFF -
Check, using flow
chart A (Refer to
Check, using flow
I
Remedy