B00D2

Code

Generic B — Body

Restraint System Malfunction Indicator 1

Brand: Generic

Type: B — Body

Views: UK: 30 EN: 130 RU: 57

AI status

Completed

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Page language: EN

Causes

Faulty SRS (airbag) warning lamp or instrument cluster driver
Open/short or high resistance in the lamp circuit (wiring, connector, bulb/LED)
SRS control module internal fault or software error
Low or unstable battery/vehicle supply voltage
Missing or corrupted communication between SRS module and instrument cluster (CAN/low-speed network)
Faulty clockspring, seatbelt buckle sensor, crash sensor, or occupant classification sensor causing related fault reporting

Symptoms

SRS / airbag warning lamp illuminated, flashing, or failing to illuminate on key-on bulb check
Intermittent or permanent illumination of restraint system indicator
Related airbag or seatbelt pretensioner system messages shown on scan tool
Possible disablement of airbag readiness (SRS module reporting faults)
Other network modules reporting communication errors

What to check

Use a capable scan tool to read freeze frame data and all stored SRS and network DTCs
Verify battery voltage with ignition on and while cranking (should be stable close to battery voltage)
Visually inspect SRS wiring, connectors, and fuses (dash, steering column, under seats) for damage or corrosion
Perform key‑on bulb check: SRS lamp should illuminate briefly then extinguish if no faults
Check for recent collision/deployment history and module replacement or repair tags
Confirm CAN/LIN bus nodes are present and that network voltage/waveforms are within expected ranges

Signal parameters

SRS warning lamp control: expected lamp-on during key-on bulb check, then off if no faults
Module supply voltage: ~12 V with ignition on (stable and not dropping during checks)
Lamp circuit continuity: low resistance through lamp/LED and wiring to module/cluster
CAN bus activity: diagnostic messages for SRS present on bus during scan; no dominant bus errors
Fault counters/UDS data: stored status bits, event counts, and self-test results in SRS module

Diagnostic algorithm

Safety first: follow manufacturer SRS service precautions. Disable SRS power (battery negative disconnect or manufacturer procedure) and wait recommended time before touching components.
Connect a diagnostic scan tool with airbag/SRS capabilities. Record all SRS and network codes, freeze frame, and module status. Note any modules reporting timeouts or communication errors.
Check battery state-of-charge and charging system. Recharge or replace battery if low, then retest to eliminate low-voltage causes.
Perform visual inspection of instrument cluster, dash harness, steering column, clockspring, and seat/under-dash connectors for damage, loose pins, or corrosion. Repair any obvious wiring/connectivity problems.
Verify SRS lamp operation: with ignition ON, observe lamp behavior (bulb check). If lamp does not light, measure voltage and continuity of lamp circuit to identify open/short or failed lamp
Inspect/measure SRS module power and ground circuits at the module connectors for proper voltages and low resistance grounds. Repair poor power/ground connections.
Verify network communication: check CAN physical layer voltages and presence of SRS messages with a scope or scan tool. Repair bus faults or missing nodes.
If wiring and lamp circuits are OK but B00D2 persists, perform module self-tests and follow manufacturer step-by-step SRS diagnostics. This may include targeted component tests (clockspring, sensors, pretensioners) and module reprogramming.
If module hardware fault is confirmed, replace SRS control module or instrument cluster only per manufacturer procedures and perform required programming/initialization.
After repairs, clear DTCs and complete required SRS reconnection/initialization procedures. Confirm code does not return and perform road/test cycles as required.

Likely causes

Corroded or loose connector at SRS module or instrument cluster
Failed lamp (burnt filament or LED driver failure) or cluster circuit fault
Damaged wiring harness (pinch, chafe) in dash area or behind steering column
SRS module has stored multiple internal self-test failures (module fault)
Low battery voltage during ignition bulb check (weak battery or bad charging)
CAN/LIN bus node not responding or intermittent communication faults

Fault status

⚠️ Status

Restraint system indicator malfunction detected. The SRS warning lamp did not perform the expected self-test or the lamp/indicator circuit or SRS module communication is faulty. Further diagnosis required before returning the system to service.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-3.0 hours