Airbags

B00D4 — Restraint System Audible Indicator Malfunction

Severity: medium Safe to drive

What B00D4 means

The restraint (SRS) control module monitors the circuit of the audible indicator that warns the driver about a system fault or an unbuckled belt. B00D4 is set when the module sees an open, short or abnormal response in that circuit. It is a subfault code, so the exact failure type should be confirmed with brand-specific scan tool data.

Symptoms

  • Airbag or seat belt warning light is on
  • No warning chime at ignition on or when a belt is unfastened
  • Chime sounds intermittently or constantly
  • Other restraint system codes stored

Possible causes

  1. Failed audible indicator (buzzer)
  2. Open or shorted wiring in the indicator circuit
  3. Poor connection or corrosion at a connector
  4. Faulty SRS module or instrument cluster (less common)
  5. Recent interior repair that damaged a wire or connector

How to diagnose

  1. Scan all modules with an SRS-capable tool and record freeze frame data
  2. Check whether the chime sounds at all when the ignition is turned on
  3. Inspect the buzzer and SRS module connectors and wiring for damage, moisture and corrosion
  4. Disconnect the battery, wait the time given in the service manual, then test the circuit for opens and shorts to ground
  5. Check power and ground at the indicator connector
  6. Test the buzzer by powering it per the factory wiring diagram
  7. Clear the code and confirm it does not return

Common fixes

  • Replace the faulty buzzer or indicator
  • Repair the wiring and clean or replace connectors
  • Replace the SRS module or instrument cluster if confirmed faulty
  • Clear codes and verify system operation after repair

Questions and answers

What does B00D4 mean?

It is a fault in the restraint system audible indicator circuit. The SRS module isn't getting a normal response from the buzzer or sees a wiring problem.

Can I repair SRS wiring myself?

Visual checks of connectors are fine, but work on SRS circuits requires the battery disconnected and the waiting time from the manual. Never probe airbag squib circuits with a test light or ordinary meter.

This is general information about the code. The meaning can differ between makes and models: a scan tool and the repair manual for your car will show the exact cause.