Pulsed Secondary Air Injection (Pair)

Pulsed Secondary Air Injection (PAIR) Valve Input And Output Chart:

CIRCUIT OPERATION

When the ECM senses the proper conditions suitable for PAIR operation, via the water temperature sensor, idle switch and crank angle sensor it supplies the ground circuit to the PAIRC solenoid allowing the system to operate. Refer to EMISSION CONTROLS for further description of the PAIR valve.

Fig. 30 Solenoid Valve:

PULSED SECONDARY AIR INJECTION (PAIRC) CONTROL SOLENOID

The ECM supplies the ground circuit to the PAIRC solenoid. When activated, it redirects vacuum from the source and vent ports to the source and valve ports, applying vacuum to the PAIR.

Fig. 121 AIV Operation:

PAIR OPERATION CHART