B1544 GMC Code - Mirror Motors Common Circuit
Quick Answer
The Driver Door Module (DDM) or Passenger Door Module (PDM) controls the mirror horizontal and vertical motors through the use of bi-directional motor controls. Common causes include Faulty Driver/Passenger Rearview Mirror Motor, Driver/Passenger Rearview Mirror Motor harness is open or shorted, Driver/Passenger Rearview 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
- B1544 GMC indicates Mirror Motors Common Circuit.
- Common causes
- Common causes include Faulty Driver/Passenger Rearview Mirror Motor, Driver/Passenger Rearview Mirror Motor harness is open or shorted, Driver/Passenger Rearview 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.
Code B1544 GMC Description
Horizontal controls operate in the same manner with the mirror motor horizontal control circuit supplying voltage or ground and the mirror motor common control circuit supplying voltage or ground to the mirror horizontal motor when the mirror is commanded right and left.
What are the Possible Causes of the DTC B1544 GMC?
- Faulty Driver/Passenger Rearview Mirror Motor
- Driver/Passenger Rearview Mirror Motor harness is open or shorted
- Driver/Passenger Rearview Mirror Motor circuit poor electrical connection
- Faulty Driver Door Module (DDM) or Passenger Door Module (PDM)
How to Fix the DTC B1544 GMC?
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.
Code Tech Notes
B1544 02 Mirror Motors Common Circuit Short to Ground
B1544 04 Mirror Motors Common Circuit Open
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B1544 GMC 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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Frequently Asked Questions about B1544 GMC Code
1. What are the common symptoms of OBDII code B1544 GMC (Mirror Motors Common Circuit)?
When this code is present, you may experience issues with the power mirrors not adjusting properly or not moving at all.
2. What are the possible causes of OBDII code B1544 GMC?
Common causes of this code include faulty mirror motors, damaged wiring or connectors in the mirror circuit, or a malfunctioning mirror control switch.
3. How can I diagnose the OBDII code B1544 GMC?
Diagnosing this code typically involves checking the mirror motors for proper operation, inspecting the wiring and connectors for damage, and testing the mirror control switch for functionality.
4. Can a DIY enthusiast repair OBDII code B1544 GMC?
Repairing this code may be possible for DIY enthusiasts with experience in automotive electrical systems. Checking and repairing wiring connections, replacing mirror motors, or fixing the mirror control switch are common repair tasks.
5. Are there any quick tips for resolving OBDII code B1544 GMC?
Quick tips include checking the fuse related to the mirror circuit, ensuring the mirror motors are receiving power, and inspecting for any visible damage to the wiring or connectors.
6. How serious is OBDII code B1544 GMC?
While this code may not affect the overall drivability of the vehicle, it can be inconvenient if you rely on your power mirrors for safe driving and parking maneuvers.
7. Can OBDII code B1544 GMC cause other electrical issues in the vehicle?
In some cases, problems with the mirror motors or related circuitry may impact other electrical components in the vehicle, so it's essential to address this code promptly.
8. Is it safe to drive with OBDII code B1544 GMC not addressed?
It is generally safe to drive with this code, but you may experience difficulty adjusting your mirrors, which can impact your visibility while driving.
9. How much does it cost to repair OBDII code B1544 GMC?
The cost of repairing this code can vary depending on the specific cause of the issue, but it may involve expenses for parts and labor if professional assistance is needed.
10. Can OBDII code B1544 GMC be intermittent?
Yes, this code can sometimes be intermittent, meaning the symptoms may come and go, making it challenging to diagnose the exact cause of the issue.
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