Mitsubishi 3000GT Service Manual page 869

SERVICE BRAKES - Anti-lock Braking System Troubleshooting
E-4 When diagnostic trouble code "22 STOP LAMP SW" is displayed
The ABS-ECU outputs this diagnostic trouble code
in the following cases.
Stop light switch remains on for more than 15
l
minutes while the ABS is not functioning.
The harness wire for the stop light switch may
l
be open.
[Hint]
If the stop light operates normal, the harness for
the stop light switch input circuit is broken or there
is a malfunction in the ABS-ECU.
TSB Revision