Instruments (Instrument pack): Description and operation

INSTRUMENT PACK

1.6 model Illustrated

The instrument pack is a totally electronic device receiving electrical signals from sender units and transposing them into analogue gauge readouts.

Speedometer

The speedometer is electronic and contains a seven digit odometer and a four digit trip distance readout up to 999.9 miles or Km. The speedometer is driven by a transducer mounted in the gearbox and is calibrated to 990.5 rev/min at 60 mph (615.6 rev/min at 60 km/h) on K & ’L’ series models, or 1026 rev/min at 60 mph (637 rev/min at 60 km/h) on D series models.

Tachometer

The tachometer signal consists of 2 pulses per revolution and is taken from the ignition coil.

Fuel gauge

The fuel gauge pointer will display level of fuel in the tank when the ignition was last switched off.

When the gauge unit float is at its lowest point, indicating an empty fuel tank, the resistance to earth is at its greatest. The resistance value to fuel gauge position is:

The low fuel warning light is switched on by the thermistor in the fuel tank when approxmately 8 litres of fuel remain in the tank.