Test U: LFC 45/DTC U2018-Passenger Crash Sensor Communication Fault

U1:

U2:

U3 - U4:

U5:

U6:

U7:

U8:

U9 - U10:

Normal Operation
The passenger side crash sensor monitors the severity of a side impact crash event. If the crash event is severe enough, the sensor will signal the Restraints Control Module (RCM) to deploy the passenger side air bag.

The RCM monitors the two-wire current loop to the passenger side crash sensor for a signal that is out of the expected range. If the RCM detects an out-of-range signal from the passenger side crash sensor, indicating a sensor communication fault, it will store Diagnostic Trouble Code (DTC) U2018 And flash a Lamp Fault Code (LFC) 45 (or a higher priority code if one exists) on the air bag indicator.

Possible Causes
A passenger side crash sensor communication fault condition could be caused by:
^ damaged wiring on circuit 1263 (WH).
^ damaged wiring on circuit 1264 (BN).
^ damaged passenger side crash sensor.