AutoCodesRAM – B1D1D RAM

B1D1D RAM Code - Mirror Motor Common Control Circuit Open

Quick Answer

When the Memory Mirror Module senses an open condition on the Mirror Motor Common Driver circuit during a mirror operation, for over 10ms, this Diagnostic Trouble Code (DTC) will set. Common causes include Faulty Mirror Motor, Mirror Motor harness is open or shorted, Mirror 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
B1D1D RAM indicates Mirror Motor Common Control Circuit Open.
Common causes
Common causes include Faulty Mirror Motor, Mirror Motor harness is open or shorted, Mirror 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 459
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Aug 27, 2019
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Code B1D1D RAM Description

When the Memory Mirror Module senses an open condition on the Mirror Motor Common Driver circuit during a mirror operation, for over 10ms, this Diagnostic Trouble Code (DTC) will set.
OBDII Code B1D1D RAM - Mirror Motor Common Control Circuit Open - AutoCodes.com
B1D1D RAM Code - Mirror Motor Common Control Circuit Open

What are the Possible Causes of the DTC B1D1D RAM?

  • Faulty Mirror Motor
  • Mirror Motor harness is open or shorted
  • Mirror Motor circuit poor electrical connection
  • Faulty Memory Mirror Module

How to Fix the DTC B1D1D RAM?

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 B1D1D RAM 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 B1D1D RAM Code

1. What does the OBDII code B1D1D mean in a RAM vehicle?

The code B1D1D indicates an issue with the "Mirror Motor Common Control Circuit," specifically an open circuit, meaning there’s a break or disconnection in the wiring or components.

2. What are the common symptoms of the B1D1D code in a RAM vehicle?

Symptoms include power mirrors not responding to adjustments, mirrors stuck in one position, or erratic mirror movement.

3. What causes the B1D1D code to appear?

Common causes include a damaged wiring harness, a faulty mirror motor, a broken connector, or a malfunctioning mirror control switch.

4. Can a blown fuse cause the B1D1D code?

Yes, a blown fuse in the mirror circuit can interrupt power, causing an open circuit and triggering the B1D1D code.

5. How can I diagnose the B1D1D code on my RAM vehicle?

Start by visually inspecting the wiring and connectors for damage or corrosion, check the fuse, and use a multimeter to test for continuity in the mirror motor circuit.

6. Can I still drive my RAM vehicle with the B1D1D code?

Yes, the code doesn’t affect drivability, but your power mirrors may not function, which can be inconvenient or unsafe in some situations.

7. How do I fix the B1D1D code in my RAM vehicle?

Repairs may include fixing or replacing damaged wiring, reconnecting loose connectors, replacing a faulty mirror motor, or replacing the mirror control switch.

8. Is the B1D1D code related to both side mirrors?

Yes, this code can affect either or both side mirrors, depending on where the fault in the circuit is located.

9. Can extreme weather cause the B1D1D code to appear?

Yes, moisture, extreme cold, or heat can damage wiring or connectors, potentially leading to an open circuit and triggering the code.

10. Do I need a professional mechanic to resolve the B1D1D code?

While minor issues like a blown fuse or loose connectors can be fixed by an experienced DIYer, complex wiring or motor replacements may require a professional mechanic.

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