B1620 Code - Wiper Rear Low Limit Input Circuit Open
Quick Answer
The diagnostic trouble code B1620 indicates a problem with the Wiper Rear Low Limit Input Circuit being open. Common causes include Damaged wiring or connectors in the rear wiper system, Faulty rear wiper motor, Malfunctioning rear wiper switch. 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
- B1620 indicates Wiper Rear Low Limit Input Circuit Open.
- Common causes
- Common causes include Damaged wiring or connectors in the rear wiper system, Faulty rear wiper motor, Malfunctioning rear wiper switch.
- 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.
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Code B1620 Description
The diagnostic trouble code B1620 indicates a problem with the Wiper Rear Low Limit Input Circuit being open. In simpler terms, this means that the rear wiper system in the vehicle is not functioning properly due to an open circuit in the low limit input. The low limit input is responsible for signaling the wiper motor to stop when it reaches its lowest position. When this circuit is open, the wiper motor may not receive the correct signal, leading to erratic or non-functional rear wiper operation.
Common Causes of B1620
- Damaged wiring or connectors in the rear wiper system.
- Faulty rear wiper motor.
- Malfunctioning rear wiper switch.
- Problem with the body control module.
- Corrosion or moisture in the rear wiper system components.
Symptoms of B1620
- Rear wiper not moving or operating erratically.
- Rear wiper not stopping at the correct low limit position.
- Rear wiper making unusual noises during operation.
- Rear wiper not responding to wiper switch commands.
- Rear wiper blade not making full contact with the rear windshield.
How to Fix B1620
- Begin by inspecting the wiring and connectors in the rear wiper system for any signs of damage or corrosion. Repair or replace any faulty wiring or connectors.
- Test the rear wiper motor to determine if it is functioning correctly. Replace the motor if necessary.
- Check the rear wiper switch for proper operation. Replace the switch if it is faulty.
- Inspect the body control module for any issues related to the rear wiper system. Repair or replace the module as needed.
- Clear the diagnostic trouble code from the vehicle's system using a scan tool after completing the repairs.
Cost to Fix B1620
The cost of repairing the Wiper Rear Low Limit Input Circuit Open issue can vary depending on the specific cause of the problem and the vehicle's make and model. In general, the cost of parts for this repair can range from $50 to $200, while labor costs can range from $100 to $300. Overall, the total repair cost may fall between $150 and $500. It's important to note that these are rough estimates, and actual costs may differ based on various factors. Additionally, labor rates at auto repair shops can vary, so it's advisable to inquire about specific rates in your area for a more accurate cost estimate.
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Code B1620 Information for Specific Makes
- B1620 Lexus — Side Airbag Sensor Right Circuit Malfunction
- B1620 Scion — Side Airbag Sensor Right Circuit Malfunction
- B1620 Toyota — Side Airbag Sensor Right Circuit Malfunction
Frequently Asked Questions about B1620 Code
1. What are the common symptoms of OBDII code B1620 (Wiper Rear Low Limit Input Circuit Open)?
- The common symptoms include the rear wiper not functioning, the rear wiper not stopping at the correct position, or the rear wiper operating intermittently.
2. What are the possible causes of the OBDII code B1620?
- The code B1620 can be caused by a faulty rear wiper motor, a damaged wiring harness, a defective wiper switch, or a malfunctioning rear wiper module.
3. How can I diagnose the OBDII code B1620 issue?
- To diagnose the issue, you can start by checking the rear wiper fuse, visually inspecting the wiring harness for any damage, testing the rear wiper motor for proper functionality, and using a multimeter to check for continuity in the circuit.
4. What are some DIY repair tips for resolving the Wiper Rear Low Limit Input Circuit Open error?
- DIY repair tips include checking and replacing any blown fuses related to the rear wiper, inspecting and repairing any damaged wiring, ensuring a secure connection at the wiper motor, and testing the rear wiper switch for proper operation.
5. Can I continue driving with the OBDII code B1620 active?
- It is not recommended to continue driving with the B1620 code active, as it may lead to the rear wiper not working when needed, compromising visibility during rainy or snowy conditions.
6. How much does it typically cost to repair the Wiper Rear Low Limit Input Circuit Open issue?
- The cost of repairing the B1620 code can vary depending on the root cause of the problem, but it may range from $100 to $300 for parts and labor.
7. Will resetting the OBDII code B1620 make the issue go away permanently?
- Resetting the code may temporarily clear the error, but if the underlying issue causing the B1620 code is not addressed, the problem is likely to reoccur.
8. Is it possible to prevent the OBDII code B1620 from appearing again in the future?
- Regular maintenance of the rear wiper system, including checking for any signs of wear or damage, can help prevent the recurrence of the B1620 error code.
9. Can extreme weather conditions affect the occurrence of the OBDII code B1620?
- Yes, extreme weather conditions like heavy rain, snow, or exposure to intense sunlight can potentially exacerbate existing issues with the rear wiper system, leading to the B1620 error code.
10. How long does it usually take to repair the Wiper Rear Low Limit Input Circuit Open issue?
- The repair time for the B1620 code can vary depending on the complexity of the issue, but it typically takes around 1-2 hours for a professional technician to diagnose and fix the problem.
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