DTC 46: LH Primary Crash Sensor Not Mounted Properly

Electrical Schematic:

Normal Operation
The diagnostic monitor measures the resistance between Pin 22 (Circuit 622, T/BK) and Pin 3 (diagnostic monitor reference ground). If the diagnostic monitor measures a difference of more than 2.0 ohms between Pin 22 and Pin 3, it will flash out Diagnostic Trouble Code 46.

Note that Circuit 622 (T/BK) is attached to the side of the LH primary crash sensor case. In addition, the case is grounded to the vehicle.

Possible Causes
High resistance on Pin 22 (Circuit 622, T/BK) to ground can be caused by:
1. A poor connection due to loose mounting, dirt, or corrosion at the LH primary crash sensor mounting location.
2. An open or damaged wire in Circuit 622 (T/BK) from Pin 22 of the diagnostic monitor harness connector to LH primary crash sensor.
3. An open circuit inside LH primary crash sensor.

Pinpoint Test Steps:

46-1 - 46-2:

46-3 - 46-4: