DTC B0004-13: Driver Knee Bolster Deployment Control - Circuit open: Action

WARNING: This page is about a different car, the 2018 Land Rover Discovery Sport, 2017 Land Rover Discovery Sport, 2016 Land Rover Discovery Sport, and 2015 Land Rover Discovery Sport. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Do not measure the resistance of a deployable device using any other method than that described below.

NOTE:

The airbag connector has a locking plunger (orange tab) which should only fully lock when the two connectors are securely mated, male to female. If the plunger can move to the locked position easily when not mated (ie: using reasonable pressure), then this indicates that the connector is damaged. Install a new wiring harness as necessary.
Driver lower airbag resistance specification should be greater than 1.70 ohms and less than 3.28 ohms at -40°C to 85°C.

Using the Jaguar Land Rover approved diagnostic equipment, check datalogger signal - Deployment Control 9 Resistance (0x5B0C). Refer to the appropriate system wiring diagram and check the driver lower airbag circuit for open circuit, high resistance
Disconnect the driver lower airbag connector and apply light pressure to the connector plunger. If the plunger moves to the engaged position the connector is damaged. Install a new wiring harness as necessary
Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest. If the fault persists, install a new driver lower airbag