What does it mean?
B1884 is a Body (airbags, seat belts, body electronics) fault code. It indicates: Passenger Air Bag Deactivation (PAD) Indicator Circuit Open Or Short To Body Ground .
Symptoms
- The PASSENGER AIR BAG ON/OFF indicator never illuminates, including during the key on bulb check
- The driver cannot tell whether the passenger air bag is currently enabled or disabled
- Air bag warning lamp is also on in most cases
- Indicator may flicker or light only in one state
- Passenger restraint may be inhibited until the indicator circuit is repaired
Likely causes
- Burnt out bulb or failed LED in the PAD indicator, which sits in the centre console, overhead console or dash top depending on the vehicle
- Open circuit in the wire between the restraint control module and the indicator
- Connector at the indicator not fully seated, or its terminals corroded
- Indicator drive wire chafed against a bracket and shorted to ground
- Water damage in the console after a drink spill or a leaking windscreen
- Faulty PAD indicator module or its internal driver
- Restraint control module output stage failure
How to fix it
- Follow the air bag safety procedure before removing any trim or unplugging restraint connectors
- Watch the indicator during the key on self test and note whether it is dead, stuck on or stuck off
- Remove the indicator and inspect the bulb or LED, its socket and its connector for burnt contacts and corrosion
- Command the indicator on and off with the scan tool bidirectional test to separate a module fault from a lamp circuit fault
- Check continuity of the control wire from the module connector to the indicator, then check the same wire for a short to ground with both ends disconnected
- Inspect the console area for spilled liquid and dry and clean any affected connector
- Repair the wiring or fit a new indicator assembly, and treat the restraint control module as the last resort