Test N

PINPOINT TEST N: LFC 27/DTC B1890 - PASSENGER AIR BAG DEACTIVATION (PAD) WARNING LAMP SHORT TO BATTERY

Test N1-N2:

Test N3-N4:

Test N5:

Normal Operation
The Restraints Control Module (RCM) has the ability to deactivate the passenger air bag under certain conditions. When the passenger air bag is deactivated, the Passenger Air Bag Deactivation (PAD) switch warning lamp will be illuminated.

The RCM monitors the PAD switch warning lamp for short to battery conditions. If the RCM detects a short to battery condition on the PAD switch warning lamp circuit, it will store a Diagnostic Trouble Code (DTC) B1890 in memory and flash a Lamp Fault Code (LFC) 27 (or higher priority code if one exists) on the air bag indicator.

Possible Causes
A PAD warning lamp short to battery fault could be caused by:
^ a short to battery on circuit 1113 (YE/LG).
^ a damaged or inoperative PAD switch.
^ a damaged or inoperative RCM.