Toyota 22R-E - Pulsed Secondary Air Injection (Pair) System

To reduce HC and CO emissions, this system draws in air into exhaust ports to accelerate oxidation, using vacuum
generated by the exhaust pulsation in the exhaust manifold.
PULSED SECONDARY AIR
INJECTION (PAIR) SYSTEM
Below 1,000 rpm
Above 1,000 rpm
Below
4 km/h (2 mph)
Above
4 km/h (2 mph)
Above 40C)
(104F)
Below 30C
(86 F)
Throttle valve
position
Below 3,600 rpm
Below 1,000 rpm
Above 3,600 rpm
Above 1,000 rpm
Coolant Temp.
Vehicle speed
Normal
driving
Deceleration
Engine RPM
Condition
OFF
ON
OFF
ON
Idling
PAIR
OFF
OFF
vsv
–ENGINE EMISSION CONTROL SYSTEMS
EG1–96