Test readings, control module connections: Scope: Remember

Note the test conditions and use common sense when assessing the test result.
The test values presented apply when the ignition is in the ON position 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 control module outputs. Remember that the test values do not indicate whether the actuator is working.
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 values in % (+) and ms (+) show the pulse ratio and pulse duration of the signal. A test instrument capable of giving pulse ratio and pulse duration readings should be used. The (+) symbol indicates a positive trigger pulse, TRIG+.

Fig 1: Display Control Module Connections Test Readings (2 Of 2)
Courtesy of SAAB-SCANIA OF AMERICA, INC.