Test Point 3

Checking The Actual Values

In the Actual values menu item, the current values of the following parameters can be read out and checked:

Test point 3
Speed

- Ignition on
- Engine off
PST2 display 0 rpm

- Engine idling
PST2 display:

Tester display approximately equal to engine speed in rpm

Troubleshooting:
- Switch off ignition
- Pull off plug lion the instrument cluster
- Engine idling
- Measure the voltage between instrument cluster plug II, pin 15 and ground (AC range)
Voltmeter display: [>] 1 V

- Disconnect plug on DME control module (ME 5.2) or Disconnect plug IV on DME control module (ME 7.2) Switch ignition on
- Measure the voltage between instrument cluster plug II, pin 15 and ground
Voltmeter display: 0 V

- Ohmmeter on instrument cluster plug II pin 15 and plug on DME control module (ME 5.2) pin 80 or ME 7.2 plug IV pin 17
Ohmmeter display: [<] 5 Ohms

- See also Drive Links, "Tachometer"