B1930

Code

Other B — Body

Air Bag Safing Sensor Output Circuit Short To Ground

Brand: Other

Type: B — Body

Views: UK: 29 EN: 32 RU: 23

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Wiring insulation damaged and contacting chassis ground
Corroded or bent connector pins at sensor or SRS module
Water intrusion in connector/harness
Faulty safing sensor
Poor or missing connector mating (pin pushed out)
Aftermarket equipment or prior repairs that damaged the harness

Symptoms

Air bag / SRS warning lamp illuminated
Multiple SRS-related DTCs stored
Possible disablement of airbag deployment circuits
Intermittent or permanent lamp depending on severity
Vehicle may fail safety inspection or diagnostic readiness

What to check

Retrieve and record all SRS codes and freeze-frame data with a capable scan tool
Visually inspect wiring and connectors from safing sensor to SRS control module for damage or corrosion
Check for signs of water intrusion, rust, or rodent damage in harness
Perform a wiggle test on the harness/connectors while monitoring live data or DTC status (with safety procedures followed)
Compare wiring to manufacturer wiring diagram to locate splices and grounds
Disconnect the safing sensor connector and see if the code clears or changes (observe safety precautions)

Signal parameters

Expected: sensor output should be a defined sensor voltage or signal per manufacturer (not pulled to chassis ground)
Fault condition: output measured near 0 V (close to chassis ground) indicating a short to ground
Open/normal vs short: continuity between output wire and chassis ground should be high (open); low resistance indicates a short
Signal behavior may be steady or intermittent depending on wiring movement or corrosion

Diagnostic algorithm

Safety first: follow manufacturer SRS power-down/disarm procedure before probing or disconnecting SRS components (disconnect battery and wait the specified time).
Use a scan tool to confirm B1930 and note any related SRS codes and freeze-frame data.
Visually inspect the safing sensor, its connector, and the wiring harness route for damage, chafing, or corrosion.
With SRS power removed per manufacturer instructions, disconnect the safing sensor connector and inspect terminals for corrosion, pushed-out pins, or bent terminals.
Check continuity/resistance between the safing sensor output wire and chassis ground. A low resistance indicates a short to ground.
Back-probe or carefully measure the sensor output circuit voltage with SRS enabled only when safe and per manufacturer procedure. Confirm whether the output is being pulled to ground.
If the short is present with the sensor disconnected, trace the harness toward the SRS module and inspect splices and connections. Repair damaged wiring (repair or replace harness section) and protect with grommets and routing clips.
If the short is only present when the sensor is connected, replace the safing sensor and retest.
If wiring and sensor check good, suspect internal SRS control module fault — consult manufacturer guidance; module replacement or specialized repair may be required.
After repairs, clear codes, perform required SRS system self-tests with a scan tool, and verify the air bag lamp extinguishes and no related codes return.

Likely causes

Chafed or pinched harness where it contacts body or seat frame
Corroded connector causing low resistance path to ground
Sensor body or mounting hardware shorting the output
Connector terminal pushed out and touching ground
Failed safing sensor output transistor or circuit

Fault status

⚠️ Status

Air Bag Safing Sensor Output Circuit Short To Ground — output wire is being pulled to chassis ground; SRS control module has logged a fault and illuminated the air bag warning lamp.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.5 hours