Engine Speed Signal

ECU Pin Connectors:

To test the Engine Speed Signal to the ECU, locate pin A-5 on the ECU connector and test for the presence of an engine speed signal by connecting either a dwell meter or a tachometer. Either device will indicate the presence of a signal while the engine is running.

NOTE: To test pins do not remove the connector from the ECU, instead insert a straight pin or needle from the back side of the connector to access the pin.