What does it mean?
B1453 is a Body (airbags, seat belts, body electronics) fault code. It indicates: Curtain Air bag Module (LH) (Squib) System (Shorted to Squib Circuit Power Supply) .
Symptoms
- Airbag/SRS warning lamp on and cannot be cleared
- Left curtain airbag is disabled and will not deploy
- Fault very often follows headliner, pillar trim, windscreen or accessory installation work
- Other circuits in the same loom, such as interior or courtesy lamp feeds, may blow a fuse
- Code returns straight away after being erased
Likely causes
- Squib harness chafed against a powered wire behind the pillar trim or along the roof rail
- Aftermarket wiring for roof lamps, alarms, cameras or audio tapped into or routed through the SRS loom
- Water running down the pillar into the connector and bridging the squib pin to a live pin
- Terminal pushed out of the connector body and touching the vehicle structure or a live terminal
- Trim fastener or screw driven through the loom during a repair
- Internal fault in the curtain airbag module or in the control unit deployment driver
How to fix it
- Note the stored SRS codes and whether they are current, then power down the system: ignition off, battery disconnected, prescribed wait observed
- Disconnect the curtain module and inspect the pillar connector for water tracks, corrosion, pushed-out terminals and melted insulation
- With the battery reconnected, check the harness side of the squib circuit for any voltage; there should be none
- Note whether the voltage is present only with the ignition or the lights on, which identifies the feeding circuit
- Remove pillar and headliner trim along the loom route and look for chafe against a powered wire, a screw through the loom or non-factory splices
- Remove any added wiring from the SRS loom, repair the damaged section and re-route it clear of live wires
- Fit the approved SRS load tool in place of the curtain module to confirm whether the module itself is at fault
- Clear the codes, cycle the ignition and verify the warning lamp completes its check and stays off