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

R1:

R2 - R3:

R3 - R5:

R5:

R6 - R7:

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 motors 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 Causes
A driver side crash sensor communication fault can be caused by:
^ damaged wiring on circuit 7-JA39 (YE).
^ damaged wiring on circuit 9-JA39 (BN).
^ damaged driver side crash sensor.