Fault Family System: Body (B-Codes) 7 SAE Codes

SRS Warning Lamp Indicator Circuit

Diagnostic & Technical Explanation

Code B00D0 (Driver Seat Belt Indicator) sets when the SRS module cannot drive the instrument cluster warning lamp, the audible chime, or the passenger-airbag-off indicator to its commanded state, or the driver-operated passenger restraints disable switch reports an implausible signal. These are driver-notification circuits rather than deployment circuits, so the usual causes are a failed lamp driver in the instrument cluster, a corroded switch connector, or an open circuit in the shared indicator wiring. Because the lamp is the driver's only warning that a real restraint fault exists, this circuit should be repaired promptly even though it does not by itself disable any airbag.

These 7 diagnostic trouble codes share one detection mechanism and one repair path, which is why MechanicDB groups them into a single authored fault family rather than repeating the same explanation 7 times.

Codes in this family (7)

Code	Definition	Repair coverage
B00D0	Driver Seat Belt Indicator	4 ranked fixes
B00D1	Passenger Seat Belt Indicator	4 ranked fixes
B00D2	Restraint System Malfunction Indicator 1	4 ranked fixes
B00D3	Restraint System Malfunction Indicator 2	4 ranked fixes
B00D4	Restraint System Malfunction Audible Indicator	4 ranked fixes
B00D5	Restraint System Passenger Disable Indicator	4 ranked fixes
B00DF	Passenger Restraints Disable Switch	4 ranked fixes

What this page does not show

This page publishes the fault mechanism and the code index. The licensed dataset adds, for every one of the 15,886 codes, the full authored repair set (56,729 procedures in total) with the fields deliberately withheld here:

Procedures 2..n after the first-listed procedure
Aftermarket parts cost ranges in USD (est_parts_cost_min/max_usd)
Professional labor-hour estimates (est_labor_hours)
Step-by-step diagnostic and repair instructions
Replacement-part mappings and catalog lookups
6,637 manufacturer-specific OEM codes across 32 makes ($149 tier)

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