General

Scope
Test readings and instructions for measuring signals and signal levels on the Trionic control module are given in the following information.

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 guiding 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 article references at "Function" in the charts refer to a 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 table refer to a calibrated FLUKE 88/97.