ZEST/BOLT

ENGINE 1.3 QUADRAJET (75PS)

(v)

0.8+1.5 mm

(a)

CONSTRUCTION

Fig. 177

1. Brass bush

2. Permanent magnet

3. Plastic sensor casing

4. Coil reel

5. Polar core

6. Ring gear or flywheel

PIN OUT

Pin Description

Signal type

1 Flywheel signal (A) Frequency output

2 Flywheel signal (B) Frequency output

TECHNICAL SPECIFICATIONS

Winding resistance 790 Ohm +/- 20%

Winding resistance 680 mH +/- 20% (f=1khz)

The recommended distance (gap) between the end

of the sensor and the flywheel for obtaining correct

signals should be 0.8 - 1.5 mm.

This distance is not adjustable. If the gap is found to

be outside the tolerance limits, check the condition

of the sensor and phonic wheel.

The graph shows the sensor output signal in relation

to the horizontal development of the fly wheel.

Fig. 178

OPERATION

The changeover from full to empty determined by

the presence or absence of a gap brings about a

magnetic flux change suf ficient to generate an

induced alternating volt age proportional to the

number of teeth on the ring (or phonic wheel).

The frequency and amplitude of the voltage send to

the electronic control unit provides the latter with an

indication of the engine angular speed.

C.Cam angle sensor

Specifications

This Hall ef fect sensor is fitted on the camshaf t

housing facing the camshafts.

A tooth on the pulley allows the timing sensor to

indicate engine timing position.

The injection control unit uses the timing sensor

signal to recognize T.D.C. at the end of the

compression and during starting to synchronize the

engine management control unit with the engine.

The sensor is fitted by the exhaust side camshaft.