B0113

Code

HUMMER B — Body

Side impact module-Right Rear high circuit is less than 2.4 volts

Brand: HUMMER

Type: B — Body

Views: UK: 11 EN: 19 RU: 12

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Damaged or chafed wiring in the right rear side impact / airbag harness
Loose, corroded or disconnected connector at SDM or right rear impact sensor / squib
Short to ground on the high circuit
Open or high-resistance connection in the squib or wiring
Faulty right rear impact sensor or airbag squib
Faulty side impact / sensing & diagnostic module (SDM)

Symptoms

Airbag/SRS warning lamp illuminated on dash
Stored B0113 code (and possibly additional SRS codes) in the SDM
Right rear airbag/inflator may be disabled (no deployment capability) while fault present
Possible intermittent SRS lamp on/off if harness is damaged

What to check

Read SRS codes with an airbag-capable scan tool; record all codes and freeze frames
Verify vehicle battery voltage and charging system (11–14.5 V with ignition on)
Visually inspect right rear trim, seat, and pillar harness routing for damage, pinched wires, or corrosion
Inspect and reseat connectors at the SDM and right rear harness; look for bent pins or corrosion
Check fuses and relays for SRS/SDM power circuits
Backprobe the SDM connector (or appropriate harness connector) and measure voltages with ignition ON

Signal parameters

Battery voltage (key ON, engine OFF): typically ~12.0–14.5 V
SDM supply (VBATT) at module connector: should be near battery voltage (refer to factory spec)
Right Rear high circuit (per code): expected above 2.4 V; fault condition is < 2.4 V
Squib/inflator resistance (typical range, manufacturer-specific): approximately 2–5 Ω for many airbag squibs — verify with factory data
Open circuit / continuity: an open squib or wiring will show very high resistance (>> 1 kΩ)
Insulation/leakage: resistance to ground for squib circuit should be very high (megaohms); low resistance indicates short/leak

Diagnostic algorithm

Safety first: follow OEM SRS precautions. Disable battery negative terminal and wait required time per factory procedure before touching SRS connectors or components.
Connect an airbag-capable scan tool. Read and record all SRS/SDM codes and live data. Note any related codes (other side circuits, SDM internal faults).
Reconnect battery and with ignition ON (do not allow airbag connectors to be disconnected while system is armed unless following OEM procedure), backprobe the SDM connector pins for the right rear high circuit and measure voltage relative to good chassis ground. Confirm it is below 2.4 V as reported.
Verify SDM power and ground voltages at the module. If SDM supply is low, correct battery/charging or main power/ground issue first.
Inspect and unplug the right rear harness connector(s). Check pins for corrosion, damage or poor fit. Clean and repair as needed.
Measure continuity and resistance of the right rear squib/inflator circuit from SDM connector to the airbag connector/sensor. Compare resistance to factory spec. Repair/replace wiring or squib if out of spec.
Check for short to ground/short to voltage on the high circuit using an ohmmeter and by isolating sections of harness. Repair any shorts or chafed wiring.
If wiring and connectors are good but the circuit voltage remains low, consider replacing the right rear sensor/squib or SDM per factory diagnostics.
After repairs, clear codes with the scan tool, power-cycle and perform SRS system self-test. Confirm code does not return and SRS lamp behavior is normal.
If intermittent, secure harness routing and re-test under conditions that previously produced the fault (door movement, seat position, etc.).

Likely causes

Wiring fault (open/short/high resistance) between SDM and right rear squib or sensor
Connector pin corrosion or poor mating at SDM or in rear door/pillar trim connector
Failed right rear squib or sensor with abnormal resistance
SDM power/ground fault reducing circuit voltage
Intermittent fault due to harness movement or water ingress

Fault status

⚠️ Status

Side impact module — Right Rear high circuit voltage below threshold (< 2.4 V). SRS fault logged; inspect right rear squib/sensor wiring, connectors, power and SDM.

🔴 Repair difficulty: Hard

⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

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

B0113 — Side impact module-Right Rear high circuit is less than 2.4 volts