AutoCodes – Chrysler – B1685 Chrysler

B1685 Chrysler Code - Left Headlamp Leveling Motor Control Circuit Performance

Quick Answer

The Front and Rear Headlamp Level Sensors monitor changes in the relative distance between the vehicle body and the front or rear suspension members. Common causes include Faulty Left Headlamp Leveling Motor, Left Headlamp Leveling Motor harness is open or shorted, Left Headlamp Leveling Motor 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: B1685 Chrysler indicates Left Headlamp Leveling Motor Control Circuit Performance.
Common causes: Common causes include Faulty Left Headlamp Leveling Motor, Left Headlamp Leveling Motor harness is open or shorted, Left Headlamp Leveling Motor 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 836

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 Jun 19, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1685 Chrysler Description

The Front and Rear Headlamp Level Sensors monitor changes in the relative distance between the vehicle body and the front or rear suspension members. In vehicles with High Intensity Discharge (HID) Headlamps but without the air suspension system, the sensor circuitry is energized by the Automatic Headlamp Leveling Module (AHLM) and both sensors provide hard wired inputs back to the AHLM. The AHLM uses these sensor inputs as logic for calculating when and how much to adjust the headlamp beams as part of the Automatic Headlamp Leveling feature. The Automatic Headlamp Leveling Module (AHLM) detects a short to voltage, short to ground, or an open on the LIN Lighting circuit.

OBDII Code B1685 Chrysler - Left Headlamp Leveling Motor Control Circuit Performance - AutoCodes.com — B1685 Chrysler Code - Left Headlamp Leveling Motor Control Circuit Performance

What does this mean?

What are the Possible Causes of the DTC B1685 Chrysler?

Faulty Left Headlamp Leveling Motor
Left Headlamp Leveling Motor harness is open or shorted
Left Headlamp Leveling Motor circuit poor electrical connection
Faulty Automatic Headlamp Leveling Module (AHLM)

How to Fix the DTC B1685 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 B1685 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.

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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 B1685 Chrysler Code

1. What does the OBDII code B1685 mean in a Chrysler vehicle?

This code indicates an issue with the Left Headlamp Leveling Motor Control Circuit, meaning the circuit is not performing as expected.

2. What are the symptoms of a B1685 code in a Chrysler?

Symptoms may include an inoperative or malfunctioning left headlamp leveling motor, uneven headlight aim, or a dashboard warning light.

3. What causes the B1685 code to appear?

Common causes include a faulty headlamp leveling motor, damaged wiring or connectors in the circuit, or a malfunctioning control module.

4. Can I still drive my car with a B1685 code?

Yes, you can drive the vehicle, but improper headlamp leveling could reduce visibility and compromise safety, especially at night.

5. How do I diagnose a B1685 code?

Check the wiring and connectors for damage or corrosion, test the headlamp leveling motor, and use a scan tool to monitor the circuit's performance.

6. How can I fix a B1685 code on a Chrysler?

Repairs may include replacing the headlamp leveling motor, repairing or replacing damaged wiring, or reprogramming or replacing the control module if necessary.

7. Is the B1685 code specific to Chrysler vehicles?

Yes, the code B1685 with this description is specific to Chrysler and refers to the left headlamp leveling motor control circuit.

8. How much does it cost to repair a B1685 code?

Costs vary depending on the issue, but replacing a headlamp leveling motor typically costs between $150 and $300, including labor.

9. Can I reset the B1685 code without repairs?

You can clear the code with an OBDII scanner, but it will likely return if the underlying issue is not addressed.

10. What tools do I need to troubleshoot a B1685 code?

You will need a multimeter to check electrical connections, an OBDII scanner to read and clear codes, and potentially a wiring diagram for your vehicle.