OBD-II DTC B1459 – Wiper Washer Pump Motor Relay Coil Circuit Open
DTC B1459 meaning
DTC B1459 refers to a diagnostic trouble code indicating an issue with the wiper washer pump motor relay coil circuit. Specifically, it signifies that there is an open circuit in the relay coil, which prevents the washer pump from functioning properly. This code is part of the On-Board Diagnostics II (OBD-II) system used in vehicles to monitor various components and systems.
DTC B1459 symptoms
Common symptoms associated with DTC B1459 may include:
- Inoperative windshield washer system
- Washer fluid not spraying
- Dashboard warning lights illuminated
- Possible intermittent operation of the washer pump
DTC B1459 causes
Several factors can lead to the triggering of DTC B1459, including:
- Faulty wiper washer pump motor relay
- Open or damaged wiring in the relay coil circuit
- Corroded or loose electrical connections
- Defective wiper washer pump motor
- Issues with the vehicle’s body control module (BCM)
DTC B1459 seriousness
DTC B1459 is considered a moderate issue. While it does not typically affect the vehicle’s drivability, it can impair visibility during inclement weather due to the inoperable windshield washer system. Addressing this code promptly is important for safety and compliance with vehicle regulations.
How to diagnose DTC B1459
To diagnose DTC B1459, follow these steps:
- Use an OBD-II scanner to confirm the presence of the code.
- Inspect the wiper washer pump motor relay and its connections for any visible damage.
- Check the wiring for continuity and signs of wear or corrosion.
- Test the relay using a multimeter to ensure it is functioning correctly.
- Examine the wiper washer pump motor for proper operation.
- Inspect the body control module for any faults or issues.
How to fix DTC B1459 step-by-step instructions
To fix DTC B1459, follow these step-by-step instructions:
- Disconnect the vehicle’s battery to ensure safety while working on electrical components.
- Locate the wiper washer pump motor relay and inspect it for damage.
- If the relay is faulty, replace it with a new one.
- Check the wiring and connectors for any signs of damage or corrosion repair or replace as necessary.
- Test the wiper washer pump motor to ensure it is operational
Recommended tools for OBD-II diagnostics
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