Secondary Air Injection (AIR) System Inspection

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 TABLE. )
Access the ECTPID.
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 1O voltage is B+ and the AIR pump is not operating.
- If the PCM terminal 1O voltage is not B+, inspect and repair or replace open or short circuit between PCM terminal 1O 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 4O/AIR PUMP fuse-AIR pump relay-AIR pump)
Start the engine.
Verify that the AIR pump is operating and the PCM terminal 1O 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 4O/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 1O and AIR solenoid valve connector B.
- If the AIR pump operates and PCM terminal 1O 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)