Test readings, control module connections: Notes

Fig 1: Identifying Control Module Test Readings

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The following pages contain instructions and readings for testing the control module.

Remember: 

• Note the test condition, and use common sense when assessing the test result.
• The specified test readings are with the ignition ON, unless otherwise stated.
• Check these points:
  • First check that the control module is supplied with current 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 test readings given apply to a calibrated Fluke 88/97.
• The test readings show the signal pulse condition or pulse length. A test instrument with pulse rate or width measurement must be used.
  Fig 2: Identifying Signal Pulse Condition Or Pulse Length

  Courtesy of SAAB-SCANIA OF AMERICA, INC.