Mazda RX-8 Workshop Manual page 350

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2011 - RX-8 - Engine
DTC P0507 [13B-MSP]
DTC P0507 IAC system RPM higher than expected
DETECTION
CONDITION
POSSIBLE
CAUSE
Diagnostic procedure
The PCM compares the actual idle speed with the target idle speed when the
engine is running. If the actual idle speed is higher than targeted by 200
rpm, the PCM determines that the IAC system RPM is higher than expected.
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 (Mode 2/Mode 12) is available.
The DTC is stored in the PCM memory.
VSS malfunction
Improper connection of vacuum hoses
Drive-by-wire control system malfunction
IAT sensor malfunction
APP sensor malfunction
Eccentric shaft position sensor malfunction
ECT sensor malfunction
PCM malfunction