LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 1994 >> Pickup Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Emission Systems & Sub-Systems >> Pulsed Secondary Air Injection System >> PAIR System Test (3.0L)
April 5, 2026: LEMON Manuals is launched! Read the announcement.

PAIR System Test (3.0L)

  1. Check hoses and tubes for cracks, kinks, damage or loose connections. Ensure engine coolant temperature is less than 77°F (25°C). Disconnect No. 1 air hose from air pipe, above air intake. See Figure-50.
  2. Start engine and allow to idle. Ensure bubbling sound is heard from air pipe. Warm engine until engine coolant temperature is greater than 95°F (35°C). Ensure bubbling sound is not heard from air pipe with engine idling.
  3. Increase engine speed to 2000 RPM and quickly close throttle. Ensure bubbling noise at air pipe momentarily stops. If system does not operate correctly, check individual components.
scientia non olet · About LEMON Manuals