DTC 46: LH Primary Crash Sensor Not Mounted Properly
DIAGNOSTIC TROUBLE CODE 46LH Radiator Primary Crash Sensor Not Mounted To Vehicle Properly
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 radiator primary crash sensor case. In addition, the case is grounded to the vehicle. Note that the T/BK wire changes to P/LG at the sensor connector.
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 radiator 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 radiator primary crash sensor.
3. An open circuit inside LH radiator primary crash sensor.
Diagnostic Trouble Code 46 Electrical Schematic:
Pinpoint Tests 46-1 - 46-4:
