LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 1994 >> Pickup Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Emission Systems & Sub-Systems >> Pulsed Secondary Air Injection System >> PAIR System Test (2.4L)
April 5, 2026: LEMON Manuals is launched! Read the announcement.

PAIR System Test (2.4L)

  1. Check hoses and tubes for cracks, kinks, damage or loose connections. Ensure engine coolant temperature is less than 86°F (30°C). Disconnect No. 1 air hose from air cleaner case. See Figure-47.
  2. Start engine and allow to idle. Ensure bubbling sound is heard from No. 1 air hose.
  3. Warm engine until engine coolant temperature is greater than 104°F (40°C). Ensure bubbling sound is not heard from No. 1 air hose with engine idling.
  4. Increase engine speed and quickly close the throttle. Ensure bubbling noise at No. 1 air hose momentarily stops. If system does not operate correctly, check individual components.
scientia non olet · About LEMON Manuals