1.2.2 - Tachometer

1.2.2 Tachometer




Turn selector switch (3) to 1/min. (rpm) position. Turn knob (7) against the left stop; tachometer needle points to 0.

Turn switch (5) to correct position.

Tachometer for
6 cylinder engines = 6 cyl
4 cylinder engines = 4 cyl
diesel engines = Diesel

Turn knob (7) clockwise slowly: tachometer needle moves through display range.

If the green LEDs are still on at the beginning of the test, cancel them when the speed exceeds approx. 600 rpm.

(Only with the 2nd generation SI.)

Note: The simulator is designed for a tachometer with a display range of 8,000 1/min (rpm). In case of tachometers with a display range of 5,000 1/min (rpm), the needle will fall back to an undefined display value after reaching the final display value and increasing the frequency further with knob (7). If the frequency is increased even more, the needle will move through the display range again from this display value on.




The set frequency can be measured on the yellow jack with a BMW Service Tester (multimeter 14) - see operating instructions of BMW Service Tester.

Yellow connection terminal FREQ in + in yellow jack; black connection terminal FREQ in on B - of battery.