Control Module HVAC: Testing and Inspection
Test Readings, Control Module Connections
The following contain directions and test values for the ACC unit.
Remember:
- Note the test conditions. Use common sense when assessing the test result.
- 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.
- Test readings indicated refer to calibrated FLUKE 88/97.
- The test values indicate the pulse ratio and pulse length of the signal respectively. A test instrument for measuring pulse ratio and pulse width respectively must be used.
ACC Unit, Control Module Connections
Pin No 1 - 4:
Pin No 5 - 16:
