Mitsubishi 3000GT Service Manual page 841

SERVICE BRAKES
B ABS warning light stays on when the ignition key is in the "ON" position.
[Explanation]
This is the symptom when the ABS ECU does not
power up due to broken ECU power circuit, etc.,
when the fail safe function operates and isolates
the system or when the warning light drive circuit
is short circuited.
86 ,,87
RELAY
[Hint]
Check the on-board diagnostic output
is no output voltage or if the scan tool and ABS
ECU cannot communicate, there is a good possibil-
ity that power is not flowing to the ECU.
Caution
If the diagnostic trouble code is output, the
l
system can be in the fail safe mode. In such
a case, erase the diagnostic trouble code
and then restart the engine to check if the
system is currently in a fault condition.
Is there on-board diagnostic
output? (Is there communica-
tion with scan tool?)
Yes
Yes
Does the ABS warning light re- - Short in ECU transistor
main illuminated even with the
ECU connector disconnected?
Yes
Does the ABS warning light re-
main illuminated even with the
HU connector disconnected?
Yes
t
tween HU or ECU and ABS
warning light
TSB Revision
if there
On vehicles produced up
to Oct. 1994, refer to
On vehicles produced
from Nov. 1994, refer to
No
nostic trouble code check
chart (Refer to P.3521.).
No
No
I
No
combination meter.