Tests AC: LFC 45/DTC U2018 - Passenger Sensor Communication Fault

AC1:

AC1 - AC2:

AC2 - AC3:

AC4 - AC5:

AC5:

AC6 - AC7:

AC7 - AC9:

AC9 - AC10:

Normal Operation
The passenger side impact sensor monitors the severity of a 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 impact sensor for a signal that is out of the expected range. If the RCM detects an out-of-range signal from the passenger side impact 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 impact sensor communication fault condition can be caused by:
^ damaged wiring on circuit 1263 (WH).
^ damaged wiring on circuit 1264 (BN).
^ damaged passenger side impact sensor.