1. Connect and disconnect very quickly the two wites in the tunnel that lead forward. A distributor can be applied to help, if both wires are connected to terminal 1 and the distrihulor housing, and the distributor shaft is turned by hand as quickly as possible. Remove the OEM speedometer if there is no dcflcction of the needle. Check all wire connections to the speedometer and replace the speedometer if necessarv.
Turn on the ignition for this test.
The operation H ffii electronic speedometer of Type Oil and Turbo Carrera Models can also be checked as follows:.
Disconnect wire from terminal TD of tachometer and instead connect fhe wire from terminal 31 b on the speedometer.
The speedometer must now show a reading according to Tie engine speed. If there is no needle deflection, the speedometer must be replacod,
Relation between engine speed and speedometer reading:
The calibration number is embossed on speedometer housing.
The testing method at point 2 can no longer be on speedometers after manufacturing date 1/77. There is danger of damaging an electronic component in the speedometer.
Speedometer reading (MPH)
engine speed 5TJ
Removing and Installing Electronic Speedometer Sensor
1. Remove right rear wheel.
2. Remove hex head screw and take holder off of sensor.
3. Take sensor wires out of holders and pull sensor out of transmission case.
Separate connector in tunnel and pull out sensor wire toward rear.
The polarity need not be observed when connecting the sensor wire.