B1473 – OBD-II DTC

OBD-II DTC B1473 – Wiper Low Speed Circuit Motor Failure

DTC B1473 meaning

DTC B1473 refers to a diagnostic trouble code indicating a failure in the low-speed circuit of the windshield wiper motor. This code is part of the On-Board Diagnostics II (OBD-II) system, which monitors various vehicle components for faults. When the system detects an issue with the wiper motor’s low-speed operation, it triggers this specific code to alert the technician of the problem.

DTC B1473 symptoms

Common symptoms associated with DTC B1473 may include:

• Windshield wipers not functioning at low speed
• Wipers operating only at high speed
• Wipers not functioning at all
• Intermittent wiper operation issues
• Possible related warning lights on the dashboard

DTC B1473 causes

Several factors can lead to the triggering of DTC B1473, including:

• Faulty windshield wiper motor
• Damaged or corroded wiring in the wiper circuit
• Defective wiper switch
• Issues with the vehicle’s Body Control Module (BCM)
• Poor electrical connections

DTC B1473 seriousness

The seriousness of DTC B1473 can vary based on the symptoms experienced. While it may not pose an immediate safety risk, non-functional wipers can significantly impair visibility during rain or adverse weather conditions, increasing the risk of accidents. Therefore, it is advisable to address this issue promptly to ensure safe driving conditions.

How to diagnose DTC B1473

To diagnose DTC B1473, follow these steps:

1. Use an OBD-II scanner to confirm the presence of DTC B1473.
2. Inspect the windshield wiper motor and its connections for any visible damage or corrosion.
3. Check the wiper switch for proper operation.
4. Test the voltage and ground at the wiper motor connector.
5. Examine the wiring harness for any breaks or shorts.
6. Consult the vehicle’s service manual for specific testing procedures related to the wiper system.

How to fix DTC B1473 step-by-step instructions

To fix DTC B1473, follow these step-by-step instructions:

1. Disconnect the vehicle’s battery to ensure safety while working on electrical components.
2. Inspect and repair any damaged wiring or connectors in the wiper circuit.
3. If the wiper motor is faulty, replace it with a new or refurbished unit.
4. Test the wiper switch and replace it if it is not functioning correctly.
5. Reconnect the battery and clear the DTC using an OBD-II scanner.
6. Test the wipers to ensure they operate correctly at both low and high speeds.

How to erase DTC B1473

To erase DTC B1473, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the ignition without starting the engine.
3. Navigate to the “Erase Codes” or “Clear DTCs” option on the scanner.
4. Confirm the action to clear the trouble codes.
5. Disconnect the scanner and start the vehicle to ensure the code does not reappear.

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