Mitsubishi 1989-1993 GALANT Service Manual page 1170

SERVICE BRAKES
[Explanation]
The ABS ECU outputs this diagnostic trouble code
in the following cases.
Stop light switch may remain on for more than
l
15 minutes without the ABS functions.
The harness wire for the stop light switch may
l
be open.
SUB FUSIBLE
LINK 0
WITH
AUTO-CRUISE
CONTROL
SWITCH
ECU
If the stop light operates normal, the ABS harness
wire for the stop light switch input circuit to the ECU
is broken or there is a malfunction in the ABS ECU.
Do the stop lights light up - No
and go out normally?
Yes
connect the ABS EC
connector and inspect at
the harness side connec-
When the brake pedal is
pressed forcefully, does the
voltage between connector
terminal No. 29 and ground
indicate battery voltage?
Yes
Malfunction of ABS ECU
problem spots.
No
Harness wire between
stop light switch and ABS
ECU is broken.
Repair harness.
Replace ABS ECU.