OBD-II DTC B1819 – Wiper Rear Motor Up Relay Coil Circuit Open
DTC B1819 meaning
DTC B1819 refers to a diagnostic trouble code indicating an issue with the rear wiper motor up relay coil circuit. Specifically, it signifies that there is an open circuit in the relay coil, which prevents the rear wiper motor from functioning properly. This code is part of the On-Board Diagnostics II (OBD-II) system, which monitors various vehicle components for faults.
DTC B1819 symptoms
Common symptoms associated with DTC B1819 may include:
- Rear wiper motor not operating
- Inconsistent or erratic rear wiper function
- Dashboard warning lights illuminated
- Possible issues with other electrical components related to the rear wiper system
DTC B1819 causes
Several factors can lead to the triggering of DTC B1819, including:
- Faulty rear wiper motor relay
- Open or damaged wiring in the relay coil circuit
- Corroded or loose electrical connections
- Defective rear wiper motor
- Issues with the vehicle’s body control module (BCM)
DTC B1819 seriousness
The seriousness of DTC B1819 can vary based on the vehicle’s usage and the conditions in which it operates. While it may not pose an immediate safety risk, a malfunctioning rear wiper can impair visibility during inclement weather, potentially leading to hazardous driving conditions. Therefore, it is advisable to address this issue promptly.
How to diagnose DTC B1819
To diagnose DTC B1819, follow these steps:
- Use an OBD-II scanner to confirm the presence of the B1819 code.
- Inspect the rear wiper motor relay for any visible damage or corrosion.
- Check the wiring and connectors in the relay coil circuit for continuity and signs of wear.
- Test the rear wiper motor to ensure it is functioning correctly.
- Examine the body control module for any faults or issues.
How to fix DTC B1819 step-by-step instructions
To fix DTC B1819, follow these step-by-step instructions:
- Disconnect the vehicle’s battery to ensure safety while working on electrical components.
- Locate the rear wiper motor relay and inspect it for damage replace if necessary.
- Examine the wiring and connectors in the relay coil circuit for any breaks or corrosion
Recommended tools for OBD-II diagnostics
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