Buick Regal Owners & Service Manuals

Buick Regal: DTC B392C

Diagnostic Instructions

  • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
  • Review Strategy Based Diagnosis for an overview of the diagnostic approach.
  • Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC B392C 39

Seat Bolster Memory Control Module Internal Malfunction

Circuit/System Description

The seat memory control module detects an internal electronic fault in the seat bolster memory control module. No external circuits are involved.

Conditions for Running the DTC

Ignition ON.

Conditions for Setting the DTC

The control module detects an internal fault.

An internal electronic fault in the seat bolster memory control module will set this DTC.

Action Taken When the DTC Sets

All lumbar/bolster functions will be inoperative.

Conditions for Clearing the DTC

  • The DTC clears when the diagnostic runs and passes.
  • The history DTC will clear after 40 consecutive fault-free ignition cycles have occurred.

Reference Information

Schematic Reference

  • Driver Seat Wiring Schematics
  • Passenger Seat Wiring Schematics

Connector End View Reference

Component Connector End View Index

Description and Operation

Lumbar Support Description and Operation (With Memory Seat A44/A45) or Lumbar Support Description and Operation (Without Memory Seat A44/A45)

Electrical Information Reference

Electrical Information Reference

  • Circuit Testing
  • Connector Repairs
  • Testing for Intermittent Conditions and Poor Connections
  • Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information.

Circuit/System Verification

DTC B392C

1. Ignition ON.

2. Verify DTC B392C is not set.

  • If the DTC is set

Replace the appropriate K134 Seat Bolster Memory Control Module.

  • Go to next step: If the DTC is not set

3. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for K134D Seat Bolster Memory Control Module - Driver or K134P Seat Bolster Memory Control Module - Passenger replacement, programming and setup.

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