Mitsubishi 3000GT Service Manual page 853

SERVICE BRAKES - Anti-lock Braking Svstem Troubleshootina
TROUBLESHOOTING (ABS-AWD)
Confirm condition in the following way and diagnosis accordingly.
position, the ABS ECU causes the ABS warn-
ing light to flash four times in about one second
(during which the valve relay self check is
made) and then causes it to go out.
No. Trouble condition
1
warning
ABS light does not light up at all.
ON
ABS
warning
OFF -
light
Ignition
2
When the ignition key is turned to the "ON"
position, it remains lighted.
ON
ABS
OFF
warning
light
Ignition
3
Does not illuminate when ignition key is in
"START' position.
ON
warning
light
OFF
Ignition
ACC, LO:: --k5
(2) With the ignition key in the "START" position,
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 returned from the
"START" position to the "ON" position, the ABS
warning light flashes four times in about one
second (during which the valve relay self check
is made again) and then goes out.
Major causes
ABS warning light bulb is burnt out. Check, using flow
l
Open in ABS warning light electrical chart A (Refer to
l
circuit (check for blown fuse)
Fail safe is functioning due to ECU Check, using flow
l
diagnosis.
self
Short in ECU warning light drive cir- P.35-34.)
l
Malfunction of ECU
l
Malfunction of valve relay
l
Break in harness between ABS chart C (Refer to
l
warning light and HU
Break in harness between HU and
l
body ground
0 0 0 0 2 1 6 5
Remedy
chat-l B (Refer to
using flow
Check,