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

S1:

S2 - S3:

S3 - S5:

S5:

S6 - S7:

S7:

S8:

S9:

S10:

Normal Operation
The passenger side crash 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 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 can be caused by:
^ damaged wiring on circuit 7-JA40 (YE/VT).
^ damaged wiring on circuit 9-JA40 (BN/WH).
^ damaged passenger side crash sensor.