Test Readings

Test Readings, Control Module Connections







Scope

Nominal values and instructions for measuring voltages on the control module can be found under the respective headings below.

Remember:
- Note the test conditions and use common sense when assessing the test result.
- The nominal test readings shown apply with the ignition switched ON unless otherwise stated.
- First check that the control module has a power supply and is grounded.
- Then check all sensor inputs and signals from other systems.
- Finally, check the outputs. Remember that the test readings do not tell us whether or not the module is functioning properly.
- If any reading is not OK, consult the wiring diagram to trace the leads, connectors or components which should be checked more thoroughly.
- The specified test readings refer to those obtained with a calibrated Fluke 88/97.
- Test readings % (+) and ms (+) show the pulse ratio and pulse duration of the signal. The test instrument used must be able to measure pulse ratio and pulse width. The (+) sign denotes a positive trigger pulse, TRIG+.







Connections, head unit

> = greater than; < = less than; ~ = AC voltage (LP: LOGIC PROBE P = select pulse; p = visible pulses)

K14















K16