Mazda RX-8 Workshop Manual page 313

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2011 - RX-8 - Engine
DTC P0443 [13B-MSP]
DTC P0443 Purge solenoid valve circuit problem
DETECTION
CONDITION
POSSIBLE
CAUSE
Detect any of the following condition:
The control voltage of the purge solenoid valve is less than specification even
though the purge solenoid valve is off.
The current in the output driver IC over-current detection circuit above 3.5 A
even though the purge solenoid valve is ON.
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.
Purge solenoid valve connector or terminals malfunction
Short to ground or open circuit in purge solenoid valve power supply circuit
Short to ground in wiring harness between main relay terminal C and purge
solenoid valve terminal A
Purge solenoid valve related fuse malfunction
Open circuit in wiring harness between main relay terminal C and purge
solenoid valve terminal A
Short to ground in wiring harness between purge solenoid valve terminal B and PCM terminal
2C
Purge solenoid valve malfunction
PCM connector or terminals malfunction
Short to power supply in wiring harness between purge solenoid valve terminal B and PCM
terminal 2C
Open circuit in wiring harness between purge solenoid valve terminal B and PCM terminal 2C
PCM malfunction