AutoCodes – Nissan – C1685 Nissan

C1685 Nissan Code - 4WAS Main Control Unit Communication

Quick Answer

The 4 Wheel Active Steer (4WAS) front control unit and 4WAS main control unit transmit/receive information to/from each other for optimum control of the 4WAS system with the specified 4WAS system line (4WAS communication line) between 4WAS Front Control Unit and 4WAS Main Control Unit. Common causes include Faulty 4 Wheel Active Steer (4WAS) Main Control Unit, Faulty 4 Wheel Active Steer (4WAS) Front Control Unit. 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: C1685 Nissan indicates 4WAS Main Control Unit Communication.
Common causes: Common causes include Faulty 4 Wheel Active Steer (4WAS) Main Control Unit, Faulty 4 Wheel Active Steer (4WAS) Front Control Unit.
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 799

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Nov 17, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1685 Nissan Description

OBDII Code C1685 Nissan - 4WAS Main Control Unit Communication - AutoCodes.com — C1685 Nissan Code - 4WAS Main Control Unit Communication

What does this mean?

What are the Possible Causes of the DTC C1685 Nissan?

Faulty 4 Wheel Active Steer (4WAS) Main Control Unit
Faulty 4 Wheel Active Steer (4WAS) Front Control Unit

How to Fix the DTC C1685 Nissan?

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 C1685 Nissan 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 C1685 Nissan code?

Need more information on how to fix the C1685 Nissan code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1685 Nissan code diagnosed by a professional: Find a repair shop in your area

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 C1685 Nissan Code

1. What does the OBDII code C1685 for Nissan mean?

The OBDII code C1685 for Nissan refers to a communication error with the 4WAS Main Control Unit.

2. What are the common symptoms of OBDII code C1685 in a Nissan?

Common symptoms of OBDII code C1685 in a Nissan include ABS warning lights, traction control issues, and potential difficulty steering.

3. What are some possible causes of OBDII code C1685 in a Nissan?

Possible causes of OBDII code C1685 in a Nissan include damaged wiring, faulty connectors, a malfunctioning 4WAS Main Control Unit, or a communication error within the system.

4. How can I diagnose OBDII code C1685 in my Nissan?

Diagnosing OBDII code C1685 in a Nissan involves using an OBDII scanner to retrieve the specific code, checking the wiring and connectors for any damage, and testing the 4WAS Main Control Unit for proper functionality.

5. Is it safe to continue driving my Nissan with OBDII code C1685 present?

It is not recommended to continue driving your Nissan with OBDII code C1685 present, as it can affect the proper operation of vital safety systems like ABS and traction control.

6. Can I repair OBDII code C1685 in my Nissan myself?

Repairing OBDII code C1685 in a Nissan may require advanced diagnostic tools and expertise. It is advisable to consult a professional mechanic or dealership for proper diagnosis and repair.

7. How much does it typically cost to repair OBDII code C1685 in a Nissan?

The cost to repair OBDII code C1685 in a Nissan can vary depending on the underlying cause of the issue. It is recommended to obtain a diagnosis from a qualified technician for an accurate estimate.

8. Can OBDII code C1685 in a Nissan cause other issues with the vehicle?

OBDII code C1685 in a Nissan primarily affects the communication with the 4WAS Main Control Unit. However, if left unresolved, it can lead to additional problems with the ABS, traction control, and overall vehicle stability.

9. Will resetting the OBDII code C1685 in my Nissan make it go away permanently?

Resetting the OBDII code C1685 in your Nissan may clear the warning lights temporarily, but if the underlying issue is not addressed, the code is likely to reappear. It is important to diagnose and repair the root cause of the problem.

10. How long does it typically take to repair OBDII code C1685 in a Nissan?

The time to repair OBDII code C1685 in a Nissan can vary depending on the complexity of the issue and the availability of parts. It is advisable to consult with a professional technician for a more accurate timeline.