Mazda 1984 RX7 Specifications download pdf (Page 12)

AIR INJECTION SYSTE

when the overdrive switch is open.

Switching Solenoid Valve

Switches secondary air to exhaust port or rear catalyst.

Vacuum Control Solenoid Valve

Cuts out vacuum to distributor during deceleration.

SENSORS

Heat Hazard Sensor

Detects floor temperature and sends signal to relief solenoid

valve control unit.

Intake Air Temperature Sensor

Detects intake air temperature and controls pressure control

valve and BAC valve through control unit.

Water Thermo Sensor

Detects engine coolant temperature and sends signal to

control unit.

SWITCHES

Clutch and Neutral Switches

Detects in-gear condition and sends signal to control unit.

Clutch switch closes when clutch pedal is depressed and opens when

pedal is released. Neutral switch closes when transmission is in

neutral and opens when transmission is in gear.

Overdrive Switch

Controls ACV solenoid, when transmission is in 5th gear the

over drive switch is open. All other gears the overdrive switch is

closed.

Vacuum Switch

Detects intake manifold vacuum and sends signal to control

unit. The vacuum switch opens when theres approx. 15 in. Hg of vacuum.

Fig. 1: Air Injection System (RX7 Fuel Injected Models)

TESTING

AIR INJECTION & SECONDARY AIR CONTROL

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 96 97

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Mazda 1984 RX7 Specifications Page 12