B1689 Code - Autolamp Delay Circuit Failure
Quick Answer
The B1689 diagnostic trouble code (DTC) refers to an Autolamp Delay Circuit Failure, indicating a malfunction within the system responsible for controlling the delay in turning off the vehicle's exterior lights after the ignition is switched off. Common causes include Faulty autolamp delay relay, Wiring issues or short circuits in the autolamp delay circuit, Malfunctioning light control module. 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
- B1689 indicates Autolamp Delay Circuit Failure.
- Common causes
- Common causes include Faulty autolamp delay relay, Wiring issues or short circuits in the autolamp delay circuit, Malfunctioning light control module.
- 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 B1689 Description
The B1689 diagnostic trouble code (DTC) refers to an Autolamp Delay Circuit Failure, indicating a malfunction within the system responsible for controlling the delay in turning off the vehicle's exterior lights after the ignition is switched off. This circuit is designed to keep the lights on for a specific amount of time to provide illumination as you walk away from the vehicle. When this circuit fails, it can lead to issues with the vehicle's lighting system, potentially causing safety concerns and draining the battery if the lights remain on for an extended period.
Common Causes of B1689
- Faulty autolamp delay relay.
- Wiring issues or short circuits in the autolamp delay circuit.
- Malfunctioning light control module.
- Problems with the autolamp delay timer.
Symptoms of B1689
- Exterior lights staying on longer than usual after turning off the vehicle.
- Exterior lights not turning off at all after the ignition is switched off.
- Inconsistent behavior of the autolamp delay function.
- Battery draining more quickly than usual due to lights staying on.
How to Fix B1689
- Begin by conducting a thorough inspection of the autolamp delay circuit, checking for any visible damage or loose connections.
- Test the autolamp delay relay and replace it if found to be faulty.
- Check the wiring for any signs of wear, corrosion, or short circuits, repairing or replacing as necessary.
- Inspect the light control module for any issues and replace if needed.
- Finally, reset the system and test the autolamp delay function to ensure proper operation.
Cost to Fix B1689
The cost of repairing a B1689 Autolamp Delay Circuit Failure can vary depending on the specific cause of the issue and the labor rates in your area. On average, the repair may cost between $100 and $300, including parts and labor. Keep in mind that additional diagnostic time may be needed to pinpoint the exact problem, so it's recommended to consult with a professional mechanic for an accurate estimate based on your vehicle's make and model.
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Frequently Asked Questions about B1689 Code
What does the OBDII code B1689 mean?
Code B1689 indicates a failure in the autolamp delay circuit, which manages the delay time for the automatic headlamp system after the vehicle is turned off.
What are the common symptoms of code B1689?
Typical symptoms include headlights not turning off automatically, headlights staying on for too long, or the autolamp system not functioning at all.
What causes the B1689 code to appear?
Common causes include a faulty autolamp delay relay, damaged wiring or connectors in the circuit, or a malfunctioning light control module.
Can a blown fuse cause the B1689 code?
Yes, a blown fuse in the autolamp system circuit can interrupt the power supply and trigger the B1689 code.
How is the B1689 code diagnosed?
Technicians typically inspect the autolamp delay relay, wiring, and connectors for damage or corrosion, and they may test the light control module for proper functionality.
Can I drive with the B1689 code active?
Yes, you can drive with this code active, but the automatic headlamp feature may not work properly, which could be inconvenient or unsafe in low-light conditions.
How do you fix the B1689 code?
Repairs may involve replacing a faulty autolamp delay relay, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the light control module.
Is the B1689 code vehicle-specific?
Yes, the B1689 code is specific to certain makes and models, so always consult the vehicle's service manual for accurate diagnostics and repair procedures.
Can a bad battery cause the B1689 code?
A weak or failing battery can potentially cause electrical issues, but it is not a common cause of the B1689 code. However, it’s worth checking the battery's condition as part of the diagnosis.
Will resetting the code fix the issue?
Clearing the code with a scan tool may temporarily remove it, but if the underlying problem is not addressed, the code will likely reappear.
Discuss the causes and fixes for B1689 OBDII Code
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