Secondary Air Supply

Fig. 88 Secondary air supply system diagram (Federal):

The air injection system for Federal vehicles, Fig. 88 consists of a reed valve and a secondary air control valve/reed valve assembly, a solenoid valve, an ECU, and engine sensors.

Fig. 86a Secondary air control valve:

The secondary air control valve/reed valve, Fig. 86a supplies additional air into the exhaust manifold during the engine warm-up operation and vehicle deceleration.

The secondary air control valve is opened by intake manifold vacuum when the solenoid valve is energized by the ECU based on the information on coolant temperature, engine speed, time, and idle position switch status.

Fig. 87 Secondary air reed valve:

A second reed valve, Fig. 87 supplies additional air into the exhaust pipe upstream of the rear catalytic converter while the engine is running. Exhaust vacuum generated from pulsations in exhaust manifold pressure actuate the reed valve to supply secondary air to reduce exhaust emissions.

Fig. 113 Secondary air supply system (California):

The air injection system for California vehicles, Fig. 113 consists of a reed valve and a secondary air control valve/reed valve assembly, a solenoid valve, an ECU, and engine sensors.

Fig. 86a Secondary air control valve:

The secondary air control valve/reed valve, Fig. 86a supplies additional air into the exhaust manifold during the engine warm-up operation and vehicle deceleration.

The secondary air control valve is opened by intake manifold vacuum when the solenoid valve is energized by the ECU based on the information on coolant temperature, engine speed, time, and idle position switch status.