AutoCodes – Jeep – B1C18 Jeep

B1C18 Jeep 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 Jeep 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 2,666

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

What does this mean?

What are the Possible Causes of the DTC B1C18 Jeep?

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 Jeep?

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 Jeep 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 Jeep code?

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

Need Help with the Code?

Get the B1C18 Jeep 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 Jeep Code

1. What are the common symptoms of OBDII code B1C18 in a Jeep related to the Passenger Active Headrest Control Circuit Low?

The common symptoms include the airbag warning light illuminating on the dashboard and a potential malfunction of the passenger active headrest system.

2. What could cause the OBDII code B1C18 in a Jeep, indicating an issue with the Passenger Active Headrest Control Circuit Low?

The code B1C18 typically indicates a fault in the wiring, connectors, or components related to the passenger active headrest control circuit.

3. How can I diagnose the cause of OBDII code B1C18 in my Jeep for the Passenger Active Headrest Control Circuit Low?

To diagnose the issue, you should visually inspect the wiring and connectors for any visible damage, test the circuit for continuity, and check the components such as the control module and sensors.

4. What are some tips for repairing OBDII code B1C18 in a Jeep due to the Passenger Active Headrest Control Circuit Low?

Repair tips include repairing or replacing damaged wiring or connectors, resetting the airbag system, and recalibrating the passenger active headrest control module.

5. Can I drive my Jeep with the OBDII code B1C18 related to the Passenger Active Headrest Control Circuit Low?

It is not recommended to drive the vehicle with unresolved airbag system issues. It is advisable to address the problem promptly to ensure the safety features work correctly in case of an accident.

6. Is it possible to reset the OBDII code B1C18 in a Jeep without fixing the underlying issue with the Passenger Active Headrest Control Circuit Low?

While you can clear the fault code using an OBDII scanner, it is crucial to address the root cause of the problem to prevent potential safety risks and ensure the system functions properly.

7. How much does it typically cost to repair OBDII code B1C18 in a Jeep related to the Passenger Active Headrest Control Circuit Low?

The cost of repair can vary depending on the extent of the issue, the need for replacement parts, and labor costs. It is advisable to consult a professional mechanic for an accurate estimate.

8. Are there any recalls or service bulletins related to OBDII code B1C18 in Jeep vehicles for the Passenger Active Headrest Control Circuit Low?

It is recommended to check with the manufacturer or authorized Jeep service center for any relevant recalls or service bulletins related to this specific OBDII code to see if your vehicle is affected.

9. Can a DIY enthusiast with basic automotive knowledge fix OBDII code B1C18 in a Jeep related to the Passenger Active Headrest Control Circuit Low?

Depending on the specific issue, a DIY enthusiast may be able to address simple wiring or connector problems. However, complex issues or component replacements may require professional expertise.

10. How often does the OBDII code B1C18 related to the Passenger Active Headrest Control Circuit Low occur in Jeep vehicles?

The occurrence of this OBDII code can vary among Jeep models and years. If you encounter this code, it is essential to address it promptly to maintain the safety features of your vehicle.