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AutoCodes - Generic - B1509

B1509 Code - Flash To Pass Switch Circuit Short To Battery

- Code Popularity: 5,371 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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By AutoCodes.com - Updated Apr 29, 2019
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|Code B1509 Possible Causes

  • Faulty Headlamp Switch
  • Headlamp Switch harness is open or shorted
  • Headlamp Switch circuit poor electrical connection
  • Faulty Smart Junction Box (SJB)

|How do I Fix the Code B1509?

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's pins.

Does your Car have Safety Recalls? → Check here

|What is the Cost to Diagnose the Code B1509?

Labor: 1.0

The cost of diagnosing the B1509 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

|What are Code B1509 Possible Symptoms?

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

|Code B1509 Description

The Smart Junction Box (SJB) sends reference signals to the headlamp switch through circuits. When the headlamp switch is placed in the HEADLAMPS ON position, the voltage signal is routed to ground through the circuit. If the SJB detects a fault with the headlamp switch inputs, the SJB turns the exterior lamps on by default. When the SJB detects the headlamp switch in the HEADLAMPS ON position and the multifunction switch in the LOW BEAM position, the SJB sends voltage through circuits to the low beam headlamps. When the SJB detects the headlamp switch in the HEADLAMPS ON position and the multifunction switch in the HIGH BEAM position, the SJB sends voltage through circuits to the high beam headlamps. The SJB sends a reference signal to the multifunction switch through circuits CLF27 (GN/BN) and CLF17 (WH/OG). When the multifunction switch is placed in the FLASH-TO-PASS or HIGH BEAM position, the voltage signal is routed to ground. When the SJB detects a request for the flash-to-pass, the SJB sends voltage to the high beam headlamps. The OBDII codes when the SJB detects a short to ground from the flash-to-pass input circuit.

OBDII Code B1509 - Flash To Pass Switch Circuit Short To Battery - AutoCodes.com
B1509 Code - Flash To Pass Switch Circuit Short To Battery

|Need More Information on the B1509 Code?

Need more information on how to fix the B1509 code? Get Access to Factory Service Manuals

|Information for Specific Makes

|Need Help with the B1509 Code?

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|Code B1509 comments

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