AutoCodes – Chrysler – B1C18 Chrysler

B1C18 Chrysler Code - Passenger Active Headrest Control Circuit Low

Quick Answer

The Passenger Active Headrest signal circuit is driven by a solenoid that also uses a diode in parallel. Common causes include Faulty Passenger Active Headrest, Passenger Active Headrest harness is open or shorted, Passenger Active Headrest circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B1C18 Chrysler indicates Passenger Active Headrest Control Circuit Low.
Common causes: Common causes include Faulty Passenger Active Headrest, Passenger Active Headrest harness is open or shorted, Passenger Active Headrest circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 1,481

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 24, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1C18 Chrysler Description

The Passenger Active Headrest signal circuit is driven by a solenoid that also uses a diode in parallel. The single electrical component of the Active Headrest (AHR) unit is the latch-release solenoid. The solenoid is connected by a 2 way pigtail wire and harness connector. The pigtail wire and 2 way connector are routed through the center of one of the headrest support posts and down through the guide sleeve to the interior of the seat back, where it connects to the seat wire harness. The solenoid is grounded at an independent dedicated ground. The AHR components itself cannot be repaired. If damaged or ineffective, the AHR must be replaced as a new assembly. If upon inspection the AHR has deployed it can be reset following the proper reset method.

OBDII Code B1C18 Chrysler - Passenger Active Headrest Control Circuit Low - AutoCodes.com — B1C18 Chrysler Code - Passenger Active Headrest Control Circuit Low

What does this mean?

What are the Possible Causes of the DTC B1C18 Chrysler?

Faulty Passenger Active Headrest
Passenger Active Headrest harness is open or shorted
Passenger Active Headrest circuit poor electrical connection
Fault Occupant Restraint Controller (ORC)

How to Fix the DTC B1C18 Chrysler?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1C18 Chrysler code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B1C18 Chrysler code?

Need more information on how to fix the B1C18 Chrysler code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1C18 Chrysler code diagnosed by a professional: Find a repair shop in your area

Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service

Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.

Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1C18 Chrysler Code

1. What does the OBDII code B1C18 mean on a Chrysler?

B1C18 indicates a problem with the Passenger Active Headrest Control Circuit, specifically a low voltage condition.

2. What are the common symptoms of the B1C18 code?

Common symptoms include a malfunctioning or unresponsive passenger-side active headrest, airbag warning lights, and possibly a stored fault code in the vehicleâ€™s computer.

3. What causes the B1C18 code to appear?

The most common causes are damaged wiring, a faulty Active Headrest Control Module, connector issues, or a short circuit in the control circuit.

4. Is it safe to drive with the B1C18 code active?

While the car may still be drivable, the active headrest may not deploy correctly in the event of a collision, which could compromise passenger safety.

5. How do I diagnose the B1C18 code?

Start by visually inspecting the wiring and connectors for damage or corrosion, and use a multimeter to check for correct voltage in the control circuit.

6. Can a faulty Passenger Active Headrest Control Module cause the B1C18 code?

Yes, a malfunctioning module can cause the circuit to register low voltage, triggering the code.

7. How do I fix the B1C18 code on a Chrysler?

Repairs may include replacing damaged wiring, cleaning or reconnecting faulty connectors, or replacing the Passenger Active Headrest Control Module if it is defective.

8. How much does it cost to fix the B1C18 code?

The repair cost varies depending on the issue, but wiring repairs typically cost less, while replacing the control module could range from $200 to $600, including parts and labor.

9. Can a weak car battery trigger the B1C18 code?

A weak or failing car battery may contribute to low voltage issues, but it is not a common cause for this specific code.

10. Do I need a professional to clear the B1C18 code?

While clearing the code requires an OBDII scanner, itâ€™s important to first resolve the underlying issue to prevent the code from returning. Professional help may be needed if the problem is complex.