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Tahoe / Yukon Service Manual

DTC B196D

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 B196D Front Seat Bolster Memory Module - Driver Symptom Byte Information: Symptom Byte List Circuit/System Description An internal fault is detected inside the Front Seat Bolster Memory Module - Driver. No external circuits are involved. Conditions for Running the DTC Ignition ON. Lumbar/bolster switch request or lumbar/bolster control must be activated. Conditions for Setting the DTC The Driver Seat Adjuster Memory Module detects an internal Front Seat Bolster Memory Module - Driver. Action Taken When the DTC Sets The Driver Seat Adjuster Memory Module may disable lumbar and bolster functions. 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 Schematics Connector End View Reference Master Electrical Component List Description and Operation Lumbar Support/Massage Description and Operation Memory Seats Description and Operation Electrical Information Reference Circuit Testing Testing for Intermittent Conditions and Poor Connections Wiring Repairs Scan Tool Reference Control Module References for scan tool information Circuit/System Verification

  1. Ignition ON.
  2. Operate all lumbar and bolster functions.
  3. Verify DTC B196D is not set. ⇒ If the DTC is set Replace the K104D Front Seat Bladder Control Module - Driver. ⇓ If the DTC is not set
  4. A fault is currently not present and may be an intermittent condition. Repair Instructions Perform the Diagnostic Repair Verification after completing the repair. Front Seat Back Lumbar Replacement for K104D Front Seat Bladder Control Module - Driver.