Mazda RX-8 Workshop Manual page 362

(See ON-BOARD DIAGNOSIS
(See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL
Are DTCs stored?
INSPECT BRAKE SWITCH CONNECTOR FOR POOR CONNECTION
4
Turn the ignition switch off.
Disconnect the brake switch connector.
Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
Is there any malfunction?
INSPECT BRAKE SWITCH NO.1 POWER SUPPLY CIRCUIT FOR SHORT TO
5
GROUND OR OPEN CIRCUIT
Brake switch connector is disconnected.
Turn the ignition switch to the ON position (engine off).
Measure the voltage between brake switch terminal B (wiring harness-
side) and body ground.
Is the voltage B+?
INSPECT BRAKE SWITCH NO.1 SIGNAL CIRCUIT FOR SHORT TO GROUND
6
Brake switch connector is disconnected.
Turn the ignition switch off.
Inspect for continuity between brake switch terminal D (wiring harness-
side) and body ground.
Is there continuity?
[ABS].)
(See ON-BOARD DIAGNOSIS [DYNAMIC
(DSC)].) STABILITY CONTROL
No Go to the next step.
YesRepair or replace the connector and/or
terminals, then go to Step 11.
No Go to the next step.
YesGo to the next step.
No Inspect the brake switch No.1 related
fuse.
Go to Step 11.
YesIf the short to ground circuit could be
detected:
If the short to ground circuit could not be
detected:
(DSC)].)
If the fuse is melt:
Repair
or
replace
the
wiring
harness
for a
possible
short to
ground.
Replace
the fuse.
If the fuse is
deterioration:
Replace
the fuse.
If the fuse is normal:
Repair
or
replace
the
wiring
harness
for a
possible
open
circuit.
Repair or replace the
wiring harness for a
possible short to ground.
Replace the PCM (short
to ground in the PCM
internal circuit).