Mitsubishi 3000GT Service Manual page 863

SERVICE BRAKES - Anti-lock Braking System -Troubleshooting
ABS warning light does not illuminate when the ignition key is in the "START" position.
The ABS ECU uses the IG2 power source which
is turned off in the "START" position. The ABS
warning light uses the lG1 power source which
is not turned off even in the "START" position. Con-
sequently, in the "START" position, power is off
G-R 11 G-R
I - - + - -
17
30
7
ABS
ECU
Remove the No. 3 fuse from
the junction box to turn off pow-
er to the ABS-ECU. Discon-
nect the hydraulic unit connec-
IN
tor (A-64) and the ABS valve
- -
relay connector (A-65). Inspect
the harness side of both con-
nectors for damage to the ter-
minal pins. Repair terminal
pins as needed.
and ground?
connector terminal No. 8 and
terminal No. 9?
HU harness malfunction
NOTE
When performing the check marked *, note polarity of the diode
(refer to the circuit diagram).
TSB Revision
and the ECU turns the valve relay OFF. If the warn-
ing light does not illuminate at this time, there is
trouble in the warning light circuit on the valve relay
side.
Yes
I
Replace HU.