AutoCodesGeneric – B2598

B2598 Code - High Beams Are Inoperative

Quick Answer

The Smart Junction Box (SJB) monitors the multifunction switch positions by sending out voltage reference signals to the multifunction switch through circuits. Common causes include Faulty High Beam Relay, High Beam Relay harness is open or shorted, High Beam Relay circuit poor electrical connection. 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
B2598 indicates High Beams Are Inoperative.
Common causes
Common causes include Faulty High Beam Relay, High Beam Relay harness is open or shorted, High Beam Relay circuit poor electrical connection.
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 Popularity 6,424
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jan 01, 2020
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Code B2598 Description

The Smart Junction Box (SJB) monitors the multifunction switch positions by sending out voltage reference signals to the multifunction switch through circuits. The return signal is sent through the circuit. When the multifunction switch is in the high beam position, the SJB provides a ground for the high beam relay coil (which is supplied battery voltage) through circuit. When the high beam relay is energized, power is routed to circuits from the BEC. The circuits supply power to the RH and LH high beams respectively. If a problem is detected with the circuits to the multifunction switch, the SJB will not provide a ground source for the high beam relay.
OBDII Code B2598 - High Beams Are Inoperative - AutoCodes.com
B2598 Code - High Beams Are Inoperative

What are the Possible Causes of the DTC B2598?

  • Faulty High Beam Relay
  • High Beam Relay harness is open or shorted
  • High Beam Relay circuit poor electrical connection
  • Faulty Multifunction Switch
  • Faulty Smart Junction Box (SJB)

How to Fix the DTC B2598?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B2598 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B2598 code?

Need more information on how to fix the B2598 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2598 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B2598 Code

1. What does the OBDII code B2598 indicate?

The code B2598 signifies an issue where the high beams of the vehicle are inoperative or not functioning properly.

2. What are common symptoms of code B2598?

Common symptoms include the high beam lights not turning on, the high beam indicator on the dashboard not functioning, and possible dimming or flickering of the high beams if they do operate.

3. What causes the B2598 code to appear?

Potential causes include faulty high beam bulbs, damaged wiring or connectors in the high beam circuit, a malfunctioning high beam switch, or a defective headlamp control module.

4. How can I diagnose the B2598 code?

Diagnosis should start with a visual inspection of the high beam bulbs and wiring. Check for any signs of damage or wear and test the high beam switch and relay for proper operation. If these components are functioning, further testing with a multimeter or scan tool may be needed to assess the headlamp control module.

5. Can I still drive my vehicle if I have a B2598 code?

While the vehicle can still be driven, it is not advisable to drive at night or in poor visibility conditions without functioning high beams. It’s best to address the issue promptly for safety.

6. What repairs can fix the B2598 code?

Repairs might include replacing burnt-out high beam bulbs, repairing or replacing damaged wiring or connectors, replacing a faulty high beam switch, or in some cases, replacing or reprogramming the headlamp control module.

7. Is the B2598 code a serious concern?

Yes, while it may not affect the overall drivability of the vehicle during the day, having inoperative high beams compromises safety during night driving or in poor weather conditions, making it a safety concern that should be addressed.

8. How much does it typically cost to fix a B2598 code?

The cost can vary widely depending on the root cause. Bulb replacements might be relatively inexpensive, but costs can increase significantly if there is a need to replace the high beam switch or the headlamp control module. It's best to get a detailed diagnosis and quote from a professional mechanic.

9. Could ignoring the B2598 code lead to other issues in the vehicle?

Ignoring the B2598 code could potentially lead to further electrical issues if the cause is related to faulty wiring or connectors. It’s important to fix the issue to prevent potential electrical fires or further damage to the vehicle’s lighting system.

10. What tools are needed to diagnose and repair a B2598 code?

Basic tools for diagnosing and repairing a B2598 code include a set of screwdrivers, a multimeter for electrical testing, and possibly an OBDII scanner to read and clear the code from the vehicle’s computer system. For more complex issues, specialized diagnostic tools may be required.

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