A3 Mk1
Note: The connector contacts are numbered on the back of the connector.
The diode test lamp must flash briefly on each second engine revolution. If the diode test lamp does not flash: Check the power supply for the Hall sensor
|
Checking the signal wire for Hall sensor
Checking the earth wire for the Hall sensor
If the specified values are all achieved and the diode test lamp does not flash (measured between contacts 1 and 2 with starter connector attached), If the specified values are not achieved: Check the wiring between the Hall sensor and engine control unit |
Note on signal testing with an oscilloscope: The centre point of the window of the Hall sensor must lie on the third trailing edge of the engine speed signal after the reference mark gap. |