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If these values are not achieved during this testing step, measurement must be carried out directly on the engine temperature sensor.

Note:

Always measure the resistance of the engine temperature sensor between the contact tug and the housing as this contains two temperature sensors, independent from one another.

The engine temperature sensor advances the spark angle when the engine is cold for improved running,

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Possible faults

Short-circuit to ground Short-circuit to positive Break in the circuit Defective engine temperature sensor

Testing the engine temperature sensor

Ignition off

Disconnect the plugs from the EZK control unit and the LH control unit.

Connect an ohmmeter between terminal 19 and terminal 18 of the EZK control unit.

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