B1C3A is the occupant restraint controller reporting an open or high resistance on the driver seat belt retractor pretensioner circuit. The pretensioner in question is the one built into the retractor at the B pillar rather than the one at the buckle. On a vehicle that has been through a collision, this code most often means the pretensioner already fired.
Chrysler's factory chart titles the code 1st ROW DRIVER RETRACTOR PRETENSIONER CIRCUIT OPEN. Under When Monitored it reads: with the ignition on, the occupant restraint controller monitors the resistance of the driver seat belt retractor tensioner circuits. Under Set Condition: the ORC has detected an open or high resistance on those circuits.
The ORC does that by pushing a small diagnostic current of 40 mA down each squib supply circuit at power up and again every 500 milliseconds while the key is on. The squib circuits float at the module, connected to neither power nor ground, so a stray voltage cannot set one off during service.
The two wires the chart works with are (R55) driver seat belt retractor tensioner line 1 and (R53) line 2. The factory test substitutes the 8443 load tool for the pretensioner and expects each circuit to measure below 1.0 ohm back to the module. If both wires pass and the code stays active, the chart ends at replacing the ORC.
Circuit, with one very common crossover. A pretensioner is a single use device, so once it fires the circuit through it is open and the ORC reports B1C3A from that point forward. That is why the code shows up on nearly every Chrysler group vehicle that has been through a frontal collision, sitting beside stored deployment data in the module. On a vehicle with no accident history, the same code points at a connector or a wire instead.
No. The belt has to be dealt with first. A fired retractor pretensioner needs the retractor rebuilt or replaced before the circuit will read correctly, and no amount of memory work changes that. We handle the belt side with seat belt repair and pretensioner repair, and we supply genuine OEM seat belt retractors when a unit is past repair.
Once the belt is right, the module is the second half of the job. A module that recorded the deployment stays locked until that data is cleared, which is what our airbag module reset does. Mail in belt work and a module reset are commonly sent together after a collision, and either can be done on its own.
B1C3A with this wording belongs to Chrysler group vehicles using an occupant restraint controller, which covers Dodge, Chrysler, Jeep, and Ram models across that generation of ORC. The neighbors in the numbering are the other two states of the same circuit, B1C38 for circuit low and B1C39 for circuit high. Mitsubishi assigns B1C3A to a right side seat belt pretensioner squib open circuit in its own service data, so settle the make before ordering anything.
Ask about the vehicle's history first. If it has been in a frontal collision, look at the driver belt: pull it all the way out and see whether it retracts and locks normally, and check for the burnt smell and the seized retractor that come with a fired pretensioner. If that is what you find, the repair is the belt, then the module.
With no accident history, drop the B pillar trim and start at the connector. Unplug it, look for spread or corroded terminals, and reseat it before measuring anything. From there, measure both circuits back to the ORC. Related codes on the same module include B1B51 on the driver buckle switch and B1B01 on the driver airbag squib. Anything we do not have listed can be sourced through a part request.
Related codes: B1C38, B1C39, B1B51
Keep reading:
Code scope: Dodge. The same number can mean something different on another manufacturer, so match the code to your make before you act on it.
A reset clears stored crash data. A replacement part fixes a hardware fault. We have read these codes since the nineties and will tell you which one you are looking at.
Genuine OEM, tested, and shipped ground from Jacksonville, Arkansas.
Dodge parts and codes · Do not see it listed? Request a part or call 501-988-0611.