Test Y

PINPOINT TEST Y: LFC 43/DTC B2440 - PASSENGER SIDE CRASH SENSOR MOUNTING FAULT

Test Y1:

Test Y2-Y4:

Test Y5-Y6:

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 a signal from the passenger side crash sensor, indicating a sensor mounting fault, it will store Diagnostic Trouble Code (DTC) B2440 and flash a Lamp Fault Code (LFC) 43 (or a higher priority code if one exists) on the air bag indicator.

Possible Causes
A passenger side crash sensor mounting fault can be caused by:
^ damaged passenger side crash sensor.
^ corrosion or damage at the sensor mounting surface.