B1744 – Mirror Passenger Vertical Switch Circuit Short To Ground
The ODBII code B1744 indicates a short circuit in the passenger side mirror’s vertical switch circuit, meaning there is an electrical fault causing the circuit to connect to ground improperly.
The severity of ODBII code B1744 is generally considered moderate.
Common Causes For: B1743 Mirror Passenger Vertical Switch Circuit Short To Battery
- Damaged wiring or connectors
- Faulty mirror switch
- Shorted circuit within the mirror assembly
- Corroded connections
- Water intrusion or moisture damage
- Faulty passenger side mirror motor
Common misdiagnosis for B1744 Mirror Passenger Vertical Switch Circuit Short To Ground
- Faulty passenger side mirror switch
- Wiring issues or shorts in the harness
- Faulty body control module (BCM)
- Incorrectly diagnosed window switch problems
- Issues with the power mirror motor
- Grounding problems unrelated to the switch circuit
Common Troubleshooting Steps
When dealing with an OBD-II code B1744, which indicates a “Mirror Passenger Vertical Switch Circuit Short To Ground,” you can follow these common troubleshooting steps:
- Verify the Code: Use an OBD-II scanner to confirm that the B1744 code is present. Clear the code and see if it returns after a short drive.
- Inspect the Wiring and Connectors:
- Check the wiring harness and connectors associated with the passenger side mirror switch. Look for any signs of damage, fraying, or corrosion.
- Pay special attention to areas where the wiring may be exposed to moisture or physical wear.
- Check the Switch:
- Remove the passenger mirror switch and inspect it for any signs of damage or wear.
- Test the switch for continuity using a multimeter. If the switch is faulty, it may need to be replaced.
- Test for Short to Ground:
- With the switch disconnected, use a multimeter to check for continuity between the switch terminals and ground. A short to ground will indicate a problem in the wiring or the switch itself.
- If you find continuity where there shouldn’t be any, trace the wiring back to find the source of the short.
- Inspect the Mirror Assembly:
- If the wiring and switch are intact, check the mirror assembly itself. Sometimes, internal components can short out and cause issues.
- Look for any signs of moisture intrusion or physical damage.
- Check for Other Codes:
- Look for any other related trouble codes that might provide additional context or indicate a broader issue with the vehicle’s electrical system.
- Repair or Replace Components:
- Based on your findings, repair any damaged wiring or connectors. If the switch or mirror assembly is faulty, replace it with a new part.
- Recheck the System:
- After making repairs, reconnect everything and clear the codes. Test the system to ensure that the mirror functions correctly and that the B1744 code does not return.
- Consult a Professional:
- If you are unable to resolve the issue after these steps, it may be beneficial to consult a professional mechanic or an automotive electrician for further diagnosis. By following these steps, you should be able to identify and resolve the issue related to the B1744 code.