Faulty Passenger Air Bag Deactivation (PAD) Warning Lamp
PAD Warning Lamp harness is open or shorted
PAD Warning Lamp circuit poor electrical connection
Faulty Restraints Control Module (RCM)
|How to Fix the B1890 Code?
Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
The cost to diagnose the B1890 code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
When the ignition is in the ON position, the Passenger Air Bag Deactivation (PAD) indicator prove-out period is initiated by the Restraints Control Module (RCM). The RCM briefly activates the PAD indicator to verify the occupants correct functional operation of the PAD indicator. For additional information, refer to Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS). If the RCM detects an open or short to ground on the PAD indicator circuit, it will store the Diagnostic Trouble Code (DTC) B1890 in memory and illuminate the air bag warning indicator.
B1890 Code - PAD Warning Lamp Circuit Short to Battery
Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service
Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed,
it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.
Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.