Test readings, control module connections: Scope

Fig 1: Identifying Test Readings, Control Module Connections (1 Of 2)

Courtesy of SAAB-SCANIA OF AMERICA, INC.

Fig 2: Identifying Test Readings, Control Module Connections (2 Of 2)

Courtesy of SAAB-SCANIA OF AMERICA, INC.

The following pages include values and directions for measuring signals and levels on the main instrument unit and its control module.

Remember: 

• Note the test conditions and use common sense when assessing the test result.
• 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 readings 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 .
• The test values %(+) and ms(+) indicate the pulse ratio and pulse duration of the signal. A test instrument for measuring pulse ratio and pulse duration must be used. The (+) sign indicates a positive trigger pulse, TRIG+.