Tests AJ

PINPOINT TEST AJ: LFC 45/DTC U2018 - PASSENGER SIDE IMPACT SENSOR COMMUNICATION FAULT

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Normal Operation
The passenger side impact sensor monitors the severity of a impact event. If the impact 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 can be caused by:
- damaged wiring on circuit 7-JA40 (YE/VT).
- damaged wiring on circuit 9-JA40 (BN/WH).
- damaged passenger side impact sensor.