B2115

Code

HUMMER B — Body

Recline Sensor Failed

Brand: HUMMER

Type: B — Body

Views: UK: 9 EN: 16 RU: 9

AI status

Completed

ready

Completed 100%

Page language: EN

Faulty recline position sensor (potentiometer/Hall effect device) in the seatback
Damaged, corroded or disconnected harness/connector at the sensor or seat module
Short to power or ground or open circuit in the sensor wiring
Poor ground or low reference voltage to the sensor
Mechanical binding or wear in the recline mechanism causing intermittent sensor readings
Faulty seat control module or body control module

Seat will not recline or will not hold commanded position
Seat recline moves intermittently or unpredictably
Seat memory functions related to recline do not operate
Occupant classification or safety interlocks may report faults (depending on model)
B2115 stored in the body/seat control module and may trigger a dash warning

Retrieve stored codes and freeze frame data with scan tool; confirm B2115 is current
Visually inspect seat, connectors, and wiring harness along the seat rail and into the seatback for damage or corrosion
Check fuses and power/ground to seat control module
Backprobe sensor connector with ignition ON and operate seat while observing signal
Wiggle test harness while watching live data for intermittent changes
Inspect for water/moisture or foreign debris near the sensor

Reference supply typically 5 V (verify on vehicle); sensor returns variable signal proportional to recline angle
Expected signal: smooth, continuous voltage change across travel (commonly ~0.5–4.5 V) — consult service manual for exact range
No open-circuit (OL) or short to battery voltage/ground when moving the seat
Resistance-type sensors should show smooth resistance change with no sudden jumps or infinite resistance
Signal should not show noise spikes or dropouts during normal operation

Confirm code: Read B2115 and any related codes. Record freeze frame. Clear codes and attempt to reproduce.
Safety: If you must remove the seat or work near SRS components, disconnect battery and follow manufacturer SRS procedures and wait times.
Visual: Inspect connectors, pins and wiring for damage, corrosion, chafing where the harness routes through the seat and into the seatback.
Power/Ground: With ignition ON, verify reference voltage and ground at the sensor connector per wiring diagram.
Signal check: Backprobe the sensor signal wire and operate the recline function while monitoring voltage or resistance. Expect a smooth change. Note open/short or erratic output.
Wiggle test: While monitoring live data, move the harness and seat to find intermittent wiring faults or connector issues.
Isolate fault: If wiring is damaged, repair or replace harness/connector. If signal stays stuck or out of range with good supply and ground, replace the recline sensor.
Module test: If new sensor and wiring check good but code remains, test or replace seat control module per service manual. Check for required software updates or seat calibration procedures and perform them.
Verify repair: Clear codes, perform seat calibrations if required, and verify proper operation over full travel and after a road cycle.

⚠️ Status

Recline position sensor circuit malfunction detected — seat recline may be inoperative. Service required.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0 - 2.0 hours

Your experience will help others

+100 karma for a short comment :)

Was this AI description helpful?

Your feedback helps improve AI descriptions.

👍 Like 0 👎 Dislike 0

Send to email