Mitsubishi 3000GT Service Manual page 834

SERVICE BRAKES - Anti-lock Braking System Troubleshooting
TROUBLESHOOTING (ABS-FWD)
Confirm condition in the following way and diagnosis accordingly.
Does the ABS warning light illuminate as described
below up to the time the engine starts?
(1) When the ignition key is turned to the "ON"
position, the ABS ECU causes the ABS warn-
ing light to flash twice in about one second
(during which the valve relay self check is
made) and then causes it to go out.
Yes
(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 twice in about one second
(during which the valve relay self check is made
again) and then goes out.
1 sec.
ABS warning
light
OFF -
ignition
No
1 sec.
I
0 0 0 0 2 1 6 6
I