General

Test readings and instructions for measuring signals and signal levels on the Motronic control module are given in the following charts

Remember:
^ Readings should be taken via the Breakout Box (BOB) connected between the control module and the control module connector.
^ Several voltage levels must be regarded as standard values. Use your common sense when judging whether a reading is correct or not.
^ If any reading is incorrect, use the wiring diagram to ascertain which conductor, connector or component requires further testing.
^ The "Function" references in the tables refer partly to the description of operation of the relevant signal and partly to the fault diagnosis schedule with a complete description of the diagnostic procedure to be followed.
^ All test readings are for an engine at normal operating temperature.
^ Unless otherwise stated, the ignition should be switched ON.
^ The test readings in the charts refer to a calibrated FLUKE 88/97.

> = greater than; < = less than; approx = approximately equal to; ~ = alternating current ( LP:LOGIC PROBE P = select pulse; p = visible pulses).