A — Electronic control unit
B — Oxygen sensor relay
D — Throttle valve switch (idle)
E — Throttle valve switch (full throttle)
F — Frequency valve
G — Test connection
8 — to fuel pumps, control pressure regulator, and auxiliary air regulator
The frequency valve (A) is located below the throttle housing.
Both micro-switches (B) are mounted on the bottom of the throttle housing.
The oxygen sensor is threaded into the exhaust manifold on the right side of the engine.
The oxygen sensor control unit is located in the passenger compartment below the steering column. The R .P.M. relay is attached to the control unit.
A warning light on the dash comes on after 30.000 miles to remind the driver to have the oxygen sensor system serviced. The light also comes on when the ignition is switched on and go out after the engine has started as a test for the bulb.
A mileage counter with reset button is located in the engine compartment, below the brake master cylinder.
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