AUTODIAGGER AD100+ - Ford SIG Testing: Operation and Results; Selecting and Initiating SIG Test; Interpreting SIG Test Data

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Ford SIG Testing
During the test, after starting the alternator drive, the actual voltage value should correspond to the
required value and the DFM value should correspond to the current alternator load.
Some discrepancies between the voltage values are acceptable. What is important is the appropriate
reaction of the alternator – increasing or decreasing the output voltage according to the required
voltage.
After connecting the testing device, the main menu will appear on the display:
Select the SIG function and conrm by pressing the OK button. The device will go into the SIG testing
mode and display the following information:
Selected function
DFM value
Required voltage
Actual voltage