Secondary Air Injection (AIR) System Inspection

WARNING: This page is about a different car, the 2004 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.

Connect the WDS or equivalent to the DLC-2.
Verify that DTC P2257, P2258, P2259 or P2260 is not displayed.
- If DTC P2257, P2258, P2259 or P2260 are displayed, perform DTC inspection.
  (See DTC TABLES .)
Access the ECT PID.
Start the engine and warm it up to the normal operating temperature.
Cool down the engine to that the ECT PID is 30°C {86°F} or less .
Turn the ignition switch to the ON position.
Verify that the PCM terminal 10 voltage is B+ and the AIR pump is not operating.
- If the PCM terminal 10 voltage is not B+, inspect and repair or replace open or short circuit between PCM terminal 10 and AIR solenoid valve connector B.
- If the AIR pump is operating inspect for the following:
  - AIR pump relay (stuck closed)
  - Wiring harnesses and connectors (Main relay terminal C-AIR pump relay-PCM terminal 40/AIR PUMP fuse-AIR pump relay-AIR pump)
Start the engine.
Verify that the AIR pump is operating and the PCM terminal 10 voltage is 0 V after the engine is started.
- If the AIR pump does not operate, inspect for the following:
  - AIR pump relay (stuck open)
  - AIR pump (internal malfunction)
  - Wiring harnesses and connectors (Main relay terminal C-AIR pump relay-PCM terminal 40/AIR PUMP fuse-AIR pump relay-AIR pump-GND)
- If PCM terminal 10 voltage is not 0 V , inspect and repair or replace open or short circuit between PCM terminal 10 and AIR solenoid valve connector B.
- If the AIR pump operates and PCM terminal 10 is 0 V , inspect for the following:
  - AIR pump (pressure)
  - AIR solenoid valve (stuck or closed)
  - Vacuum hose (Intake manifold-vacuum tank-AIR solenoid valve-AIR control valve)
  - Secondary air passage (AIR pump-AIR control valve-exhaust manifold)