Engine-Codes - Buick - B0984 Buick

B0984 Buick Code - Left Headlamp Light Distribution Shutter Control Circuit Malfunction

- Code Popularity: 787 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

|What are the Possible Causes of the Code B0984 Buick?

  • Faulty Left Headlamp Assembly
  • Left Headlamp Assembly harness is open or shorted
  • Left Headlamp Assembly circuit poor electrical connection

|How to Fix the B0984 Buick Code?

Start by checking 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.

|What is the Cost to Diagnose the Code B0984 Buick?

Labor: 1.0

The cost to diagnose the B0984 Buick code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

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|What are Code B0984 Buick Possible Symptoms?

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

|What Does the B0984 Buick Code Mean?

Battery positive voltage is applied to the headlamp control module at all times. The headlamp control module has a normal operational voltage range of about 12.5-16 V and is only fully functional with the ignition switch is in the RUN position and the headlamp switch in the AUTO position. The communications enable signal from the Body Control Module (BCM) wakes the headlamp control module microprocessor. The headlamp control module receives serial data messages from the Engine Control Module (ECM), Transmission Control Module (TCM), Electronic Brake Control Module (EBCM), and BCM with information regarding power mode, speed, steering angle, transmission gear selection, and headlamp switch status. The headlamp control module calculates the headlamp angle and sends commands to the left and right adaptive forward lighting system headlamp actuators. The headlamp actuators drive the headlamps to the position commanded by the headlamp control module. The headlamp control module monitors the headlamp actuator motor control circuits for proper circuit continuity and for shorts to ground or voltage. If a malfunction is detected, a DTC will be stored in memory and the driver will be notified with a message displayed over the driver information center located on the instrument cluster.

Left Headlamp Light Distribution Shutter Control Circuit Malfunction

|Need more Information on the B0984 Buick Code?

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|Need Help with the B0984 Buick Code?

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