Code Definition

B2597 — Headlamp Aim Output Relay Circuit Failure

System: Body  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About B2597

B2597 is a generic (obd-ii standard) body diagnostic trouble code. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B2597 is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

Scanning & clearing: Body (B) codes are often stored in the body control module, airbag module, or climate module. A basic OBD-II tool usually will not read body codes — an enhanced or OEM-level scan tool is typically required.

Because B2597 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The B2597 fault code is set when the control module driving the headlamp aim output relay detects a generic circuit failure on the relay control output. Unlike a specific short to ground or short to battery code, a circuit failure code indicates the module saw an out of range condition that could be an open circuit, an unexpected voltage, or a mismatched feedback during the relay command. Automatic headlamp leveling systems rely on the relay to switch the aim motor or to apply power to the leveling actuators, so a circuit failure disables automatic leveling. The driver may notice the leveling ...

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