Test R: LFC 44/DTC U2017 - Driver Side Crash Sensor Communication Fault

R1:

R2:

R3 - R4:

R5:

R6:

R7:

R8:

R9 - R10:

Normal Operation
The driver 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 driver side air bag.

The RCM monitors the two-wire current loop to the driver side crash sensor for a signal that is out of the expected range. If the RCM detects an out-of-range signal from the driver side crash sensor, indicating a sensor communication fault, it will store Diagnostic Trouble Code (DTC) U2017 and flash a Lamp Fault Code (LFC) 44 (or a higher priority code if one exists) on the air bag indicator.

Possible Cases
A driver side crash sensor communication fault condition can be caused by:
^ damaged wiring on circuit 1261 (WH/LG).
^ damaged wiring on circuit 1262 (BN/LG).
^ damaged driver side crash sensor.