Mazda RX-8 Manual page 425

If the negative pressure can be verified, perform the following inspections and repair or replace
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the malfunction part.
AIR solenoid valve stuck open
Wiring harness, connectors to ground: short circuit (PCM terminal 1OAIR solenoid
valve terminal B)
8. Verify that there is negative pressure when the AIR solenoid valve is turned on from off using the
simulation function PACTNV.
If the negative pressure cannot be verified, perform the following inspections and repair or
•
replace the malfunction part.
AIR solenoid valve stuck closed
Wiring harness, connectors: open circuit (PCM terminal 1OAIR solenoid valve
terminal B)
Vacuum hose between intake manifold, vacuum tank, AIR solenoid valve, and AIR
control valve (clog, leakage, damage, poor connection)
9. Monitor the following PIDs using the monitor function.
Heated oxygen sensor (front) (WDS PID: O2S11)
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AIR pump relay (WDS PID: AIP_RLY)
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10. Warm up the engine.
11. Connect the vacuum pump to the AIR control valve.
12. Operate the AIR pump using the simulation function AIP_RLY.
CAUTION:
Do not operate the AIR pump for more than 1 min to avoid damaging the pump.
•
Allow 1 h after energization for the AIR pump to cool down before operating it again.
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Inspect the following immediately to prevent the catalyst from becoming overheated.
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13. Verify that the PID O2S11 shows a lean value when pressurizing the AIR pump using a vacuum pump
while idling.
If a lean value for the PID O2S11 cannot be confirmed, inspect the following items and repair or
•
replace the applicable part.
AIR control valve operation malfunction. (See SECONDARY AIR INJECTION (AIR)
CONTROL VALVE INSPECTION .)
Channel between AIR pump and exhaust manifold (clog, leakage)
(w) Engine Specifications
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