Normal Operation

When the ignition is ON, the Restraints Control Module (RCM) briefly activates the Passenger Air Bag Deactivation (PAD) indicator to verify to the occupants correct functional operation.

If the RCM  detects a short to voltage on the PAD  indicator circuit, it will store DTC B1890 in memory and send a message to the Instrument Cluster (IC) to flash Lamp Fault Code (LFC) 18 on the air bag warning indicator. After the LFCs  are displayed, the air bag warning indicator will remain illuminated for the rest of the ignition cycle.

• DTC B1890 (PAD  Warning Lamp Circuit Short to Battery) - If the RCM  detects a short to battery on the PAD  indicator circuit when the indicator is activated for greater than 2.2 seconds, it will set this DTC.

  This pinpoint test is intended to diagnose the following: 

• Wiring, terminals or connectors
• PAD  indicator
• RCM