DTC B1408-1A: Driver Seatbelt Anchor Pretensioner Deployment Control - Circuit resistance below threshold: Action

WARNING: This page is about a different car, the 2023 Jaguar F-Pace and 2022 Jaguar F-Pace. 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 deployable device 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. Repair the wiring harness as necessary
A shorting bar inside the connector (deployable device side) intentionally creates a short circuit until the wiring harness connector is installed and the plunger is engaged
Driver seatbelt anchor pretensioner resistance specification is 1.70 ohms to 3.28 ohms at -40°C to 85°C

Using the Jaguar Land Rover approved diagnostic equipment, check datalogger signal - Deployment Control 8 Resistance (0x5B0B). If the resistance is too low, disconnect and reconnect the driver seatbelt anchor pretensioner connector, making sure that the connector plunger is correctly engaged. Clear the DTCs and retest
Disconnect the driver seatbelt anchor pretensioner connector and apply light pressure to the connector plunger. If the plunger moves to the engaged position the connector is damaged. Repair the wiring harness as necessary
Refer to the electrical circuit diagrams and check the driver seatbelt anchor pretensioner circuit for short circuit between power and ground
Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest