Mazda RX-8 Manual page 839

DTC P07XX
DTC P0703
DTC P0703 Brake switch No.1 input circuit problem
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DETECTION
CONDITION
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POSSIBLE
CAUSE
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The PCM monitors the input signal from the brake switch No.2 when the following
conditions are met. If the input signal does not change while alternately accelerating
and decelerating 8 times , the PCM determines that there is a brake switch No.2
input circuit malfunction.
MONITORING CONDITION
Vehicle speed: decelerating more than 30 km/h {19 mph} to 0 km/h {0
mph}
Deceleration: more than 4 km/h {2 mph} per s
Diagnostic support note
This is a continuous monitor (CCM).
The MIL illuminates if the PCM detects the above malfunction condition in two
consecutive drive cycles or in one drive cycle while the DTC for the same
malfunction has been stored in the PCM.
PENDING CODE is available if the PCM detects the above malfunction condition
during the first drive cycle.
FREEZE FRAME DATA is available.
The DTC is stored in the PCM memory.
Brake switch No.2 malfunction
Connector or terminal malfunction
Open circuit in wiring harness between brake switch terminal A and PCM terminal
4P
Short to GND in wiring harness between brake switch terminal A and PCM terminal
4P
Open circuit in wiring harness between brake switch terminal C and GND
PCM malfunction
(w) Engine Diagnostics & Control
Page 276