Speedometer Head

Electric Speedometer Diagrams:

Electric Speedometer Components:

Locations of components

3 Earthing point, facia
At the left-hand front speaker socket

20 Ignition switch
On the right-hand side of the steering Column

22A Fuse board
Behind the access panel in the glove compartment

57 Three-pole connector (1987. ME, JP), (1988: ME)
At the speedometer

59 Two-pole connector
One in the engine compartment, behind the bulkhead partition (at the windscreen wiper motor)
One at the electronic speedometer

110 Tachometer
In the combined instrument on the facia

111 Electronic speedometer
In the combined instrument on the facia

112 Transmitter for electronic speedometer
In the gearbox

132 Sensor for the speed transmitter
In the speedometer, in the combined instrument

159 Distribution terminal +15
In the electrical distribution box behind the glove compartment

256 Buzzer for speed warning
In the bottom storage compartment in the centre console

356 Control unit for speed warning
On the rear side of the bottom storage compartment in the centre console

Operation
The car is equipped with an electronic speedometer, so the mechanical transmission between the gearbox and speedometer by means of a cable is no longer required.

When ignition switch 20 is set to the drive position, sensor 132 for the speed transmitter will be supplied across fuse 13 (1987) or directly (1988).

Transmitter 112 is located in the gearbox. It supplies electronic speedometer 111, in the combined instrument. This voltage varies with the speed of the car.

Middle East and Japan
On the ME market, the speedometer is fitted with speed warning buzzer 256 and control unit 356 for the speed warning. A separate cable harness is therefore connected via three-pole connector 57. Cars for the JP market are also fitted with this cable harness, but not with a buzzer.

Fault-tracing hints

1. Check fuse 13 and check that the supply to it is live (1987).
2. Check that the supply is live to terminal i of the sensor for the speed transmitter.
3. Check the connectors and check transmitter 112 for open-circuit.