Secondary Air Injection System: Inspection

INSPECT AIR PUMP
1. Connect the positive (+) lead from the battery to terminal 1 and negative (-) lead to terminal 2, and check that air flows.
If operation is not as specified, replace the air pump.

Fig 1: Checking Air Pump
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INSPECT AIR SWITCHING VALVE
1. Blow air into port A and check that air is not discharged from port B.
  
  Fig 2: Checking Air Switching Valve (1 Of 2)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Apply positive battery between the terminals.
3. Blow air into port A and check that air is discharged from port B.
If operation is not as specified, replace the air switching valve.

Fig 3: Checking Air Switching Valve (2 Of 2)
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INSPECT NO. 2 AIR SWITCHING VALVE
1. Blow air into port B and check that air is not discharged from port C.
  
  Fig 4: Checking No 2 Air Switching Valve (1 Of 2)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Apply vacuum (30 kPa (306 gf/cm² , 4.35 psi) to port A, blow air into port B and check that air is discharged from port C.
If operation is not as specified, replace the No.2 air switching valve.

Fig 5: Checking No 2 Air Switching Valve (2 Of 2)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002