B1544 Cadillac 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 Cadillac 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 Cadillac 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 Cadillac?
- 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 Cadillac?
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 Cadillac 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 Cadillac Code
1. What does the OBDII code B1544 mean on a Cadillac?
B1544 indicates a problem with the mirror motors' common circuit, which controls the power functionality of the side-view mirrors.
2. What are the symptoms of code B1544 in a Cadillac?
Symptoms include side-view mirrors not adjusting properly, mirrors being stuck in one position, or no response when using the mirror adjustment controls.
3. What causes the B1544 code to appear in a Cadillac?
Common causes include a faulty mirror motor, damaged wiring or connectors in the mirror circuit, or a malfunctioning mirror adjustment switch.
4. Can a blown fuse cause the B1544 code on a Cadillac?
Yes, a blown fuse in the mirror adjustment circuit can interrupt power to the mirror motors and trigger the B1544 code.
5. How is the B1544 code diagnosed in a Cadillac?
A technician will inspect the wiring, connectors, and fuse related to the mirror circuit, as well as test the mirror motor and adjustment switch for proper function.
6. Can I still drive my Cadillac with the B1544 code?
Yes, the vehicle is still drivable, but you may lose the ability to adjust the side-view mirrors, which could affect visibility and safety.
7. How can I fix the B1544 code on a Cadillac?
Repair involves replacing any damaged wiring, connectors, or components like the mirror motor or switch. Ensure the fuse is intact and the circuit is receiving proper power.
8. Is the mirror motor the only cause of the B1544 code?
No, other issues like faulty wiring, a bad adjustment switch, or a failing control module can also trigger this code.
9. How much does it cost to repair the B1544 code on a Cadillac?
Repair costs vary depending on the root cause, but replacing a mirror motor typically costs $100–$300, while wiring repairs may cost $50–$200.
10. Can I clear the B1544 code without fixing the issue?
Clearing the code with an OBDII scanner is possible, but if the underlying issue isn’t resolved, the code will likely return.
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