21: Safing Sensor Not Mounted to Vehicle Properly

Electrical Schematic:

Normal Operation
Circuit 613 (DB/W) is grounded to the side of the center dash panel safing sensor housing and the housing is grounded to the vehicle. A resistor inside the diagnostic monitor is connected to Pin 16 (Circuit 613, DB/W) and a 5 volt reference voltage. If Circuit 613 (DB/W) is properly grounded, the voltage at Pin 16 will be 0 volts. If the voltage on Circuit 613 (DB/W) is greater than 0.7 volt, the diagnostic monitor may flash Diagnostic Trouble Code 21, indicating that the center dash panel safing sensor is not grounded properly to the vehicle.

Possible Causes
High voltage at Pin 16 can be caused by:
1. A poor connection due to loose mounting, dirt or corrosion at the center dash panel safing sensor mounting surface.
2. An open or damaged wire in Circuit 613 (DB/W) from Pin 16 of the diagnostic monitor connector to the center dash panel safing sensor.
3. An open circuit Inside the center dash panel safing sensor.

Pinpoint Test Steps:

21-1 - 21-4: