B1910

Code

Other B — Body

Air Bag Diagnostic Monitor Ground Circuit Failure

Brand: Other

Type: B — Body

Views: UK: 30 EN: 51 RU: 41

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Open or high‑resistance ground connection to SRS control module
Corroded, loose, damaged or disconnected ground strap/bolt
Damaged wiring harness or connector (broken conductor, bent pin, corrosion)
Short to battery positive or other circuit on the ground wire
Faulty SRS control module (internal ground failure)
Aftermarket work or body repair that disturbed chassis grounds

Symptoms

SRS / air bag warning lamp illuminated on dash
Possible diagnostic trouble codes stored (B1910 and related SRS codes)
Intermittent SRS lamp (may come on only under certain conditions or with vibration)
Certain safety features (airbags/seatbelt pretensioners) may be disabled or inhibited

What to check

Verify SRS warning lamp is lit and read stored codes with a capable scan tool
Note freeze‑frame and current status flags in the SRS module
Visually inspect SRS module mounting and nearby ground points for loose bolts, corrosion, paint, damage
Inspect SRS harness and connectors for physical damage, bent pins, corrosion, moisture or loose terminals
Perform a basic continuity/ resistance check between SRS module ground pin and battery negative/chassis ground
Check for shorts to battery positive on the ground conductor

Signal parameters

Expected chassis ground voltage at SRS module connector: ~0.0–0.2 V (with respect to battery negative) when ignition ON
Expected DC resistance between SRS module ground pin and battery negative: typically
Open/high resistance: >1–5 ohm may be problematic; >>5 ohm indicates open/high resistance
No DC voltage on ground conductor relative to battery negative (presence of battery voltage indicates short to power)

Diagnostic algorithm

Safety first: follow manufacturer SRS service procedure. Disable SRS power (remove negative battery terminal and wait manufacturer‑specified time, commonly 90 seconds or more) before disconnecting SRS connectors or performing repairs.
Connect a scan tool and confirm B1910 and any related codes. Record freeze‑frame and module status. Clear codes and see if B1910 returns.
Visually inspect the SRS control module mounting area, ground straps, and the ground bolt. Look for loose fasteners, paint/undercoating on the contact surface, and corrosion.
With SRS power disabled and using appropriate safety precautions, disconnect the SRS module connector and inspect pins for damage, corrosion, or pushed‑out terminals.
Measure DC resistance between the SRS module ground terminal and known good battery negative/chassis ground. Compare to expected (
If resistance is low but intermittent fault remains, perform a wiggle test of harness with scan tool connected (with SRS enabled per manufacturer procedure) to reproduce fault while monitoring module status. Use backprobing only when safe and allowed.
Check for accidental shorts to battery positive on the ground conductor using a multimeter (voltage on ground conductor with ignition ON).
Repair or replace damaged wiring, connectors, corroded ground strap, or SRS module as indicated. When replacing or reinstalling grounds, clean to bare metal and torque to spec. Use original grounding point or verify alternative is equivalent.
After repairs, reconnect SRS power, clear codes, and perform a full SRS system scan and readiness/self‑test per manufacturer procedure. Verify the SRS lamp extinguishes and no related codes return.
If the ground and harness test OK and the code persists, consider SRS control module internal fault and consult manufacturer procedures for module replacement and post‑replace programming/initialization.

Likely causes

Loose ground bolt at SRS module or nearby chassis point
Corrosion under paint or at ground strap causing high resistance
Connector pin pushed out, bent or with corrosion at SRS module ground terminal
Chafed harness where ground conductor is broken or shorted to a powered circuit
Poor repair/paint overspray on original ground points after bodywork

Fault status

⚠️ Status

SRS control module detected malfunction in ground circuit (open/high resistance or short) affecting air bag diagnostic monitor. Immediate inspection required — system may be disabled.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours