B00E1

Code

Generic B — Body

Third Row Right Seat Belt Pretensioner B Deployment Control

Brand: Generic

Type: B — Body

Views: UK: 33 EN: 31 RU: 26

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Open or short in the pretensioner B wiring harness (damage, chafe, pinched).
Corroded or loose connector at the pretensioner or SRS module.
Failed pretensioner squib (internal short or open).
SRS/airbag control module output driver fault.
Previous deployment (pretensioner already fired) or unreset system.
Water intrusion in seat/connector or connector contamination.

Symptoms

SRS/airbag warning lamp illuminated on instrument cluster.
Stored B00E1 DTC in SRS/airbag control unit.
Possible disablement of associated restraint functions until repaired.
No additional symptoms to passenger — system fault rather than mechanical belt issues.

What to check

Read and record all stored SRS codes and freeze frame/crash data with a capable scan tool.
Check service history for prior deployment or repairs to the third‑row seats.
Visually inspect the third‑row right seat belt pretensioner connector and harness for damage, corrosion or water ingress.
Verify battery voltage and ground integrity before testing SRS circuits.
Measure pretensioner squib resistance at the connector (with battery disconnected and following safety procedures).
Check continuity between pretensioner connector and SRS module; check for shorts to ground or battery.

Signal parameters

Pretensioner coil resistance: typically low—commonly ~0.5–3.0 ohms (manufacturer specific).
Open circuit: very high/OL reading; Short to ground: near 0 ohms.
Deployment driver: usually a low‑side firing circuit controlled by the SRS module (module switches to ground to fire squib) — do NOT attempt to activate.
SRS supply voltage at module: nominal battery voltage (~12 V) with ignition on.
Diagnostic flags: PRETENSIONER_B_DEPLOY_REQUEST or similar CAN/SRS status bits (module dependent).

Diagnostic algorithm

Safety first: disable SRS power per manufacturer procedure (battery negative disconnect and specified wait time) before inspecting or disconnecting pretensioner connectors.
Use a diagnostic scan tool to read all SRS/airbag codes and crash data. Note any related codes (impact sensors, other pretensioners).
Visually inspect the third‑row right seat area, connector, and harness for physical damage, corrosion, or water entry. Repair as needed.
With ignition off and SRS power disabled, disconnect the pretensioner connector and measure squib resistance at the seat side connector. Compare to spec. Replace pretensioner if out of range or shorted.
Check continuity between the pretensioner connector and the SRS module connector. Inspect for opens, shorts to chassis ground or battery positive.
Reconnect and, with a proper diagnostic tool, monitor live SRS data for pretensioner status and any deployment request flags while following safety procedures. Do not command a deployment.
If wiring and pretensioner are good, suspect the SRS module output driver. Test/replace SRS module per manufacturer instructions and program/configure as required.
After repairs or replacements, clear codes and perform a full SRS system check with the scan tool. Verify no stored faults and correct system readiness indication.
If code returns, escalate to manufacturer service information for module bench testing or wiring diagrams and consider replacement of components as directed.

Likely causes

Low resistance (short) or very high resistance (open) measured at the pretensioner connector.
Visible damage/corrosion at third row right seat harness or connector.
Crash/impact event previously triggered deployment and not repaired/replaced.
Faulty SRS module output transistor for pretensioner B.
Poor ground or battery supply to SRS module affecting deployment control circuitry.

Fault status

⚠️ Status

Third Row Right Seat Belt Pretensioner B Deployment Control — SRS detected a fault in the deployment control circuit for the third‑row right seat belt pretensioner (pretensioner B).

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-2.5 hours