Engine-Codes - Generic - B2586

B2586 Code - High Beams Are Inoperative

- Code Popularity: 3,799 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
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What are the Possible Causes of the DTC B2586?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • 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)
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How to Fix the DTC B2586?

Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the B2586 code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

What Does the B2586 Code Mean?

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.

B2586 Code - High Beams Are Inoperative

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Code B2586 Information for Specific Makes

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