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.
READ NEXT:
Symptoms - Power Seats
NOTE: The following steps must be completed before using the symptom
tables.
1. Perform the Diagnostic System Check - Vehicle before using the Symptom
Tables in order to
verify that all of the follo
Lumbar/Bolster/Massage Malfunction (AVK without AF6 or AVU without
AKE)
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.
Diag
Lumbar/Bolster/Massage Malfunction (AL9 or AT9)
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.
Diag
SEE MORE:
Hands-Free Operation
If equipped, the liftgate may be
operated with a kicking motion
under the projected logo. The RKE
transmitter must be within 1 m (3 ft).
The hands-free feature will not work
while the liftgate is moving. To stop
the liftgate while in motion use one
of the liftgate switches.
The hands-free feature
New Vehicle Break-In
Caution:
The vehicle does not need an
elaborate break-in. But it will
perform better in the long run if
you follow these guidelines:
Do not drive at any one
constant speed, fast or slow,
for the first 805 km (500 mi).
Do not make full-throttle
starts. Avoid downshifting to
brake or slow the
