Hybspec

B0315

Średni

Power Window Motor Circuit Fault. The body control module has detected incorrect voltage or an open circuit in the window regulator mechanism circuit.

OBD-II (EN): Power Window Motor Circuit Fault

Code B0315 signals a fault in the electrical circuit of the window lift motor – the body control system has detected incorrect voltage or lack of circuit continuity. The cause could be a faulty window motor, broken wiring harness in the door, or a defective switch. Professional diagnostics are recommended to precisely locate the fault and avoid unnecessary replacement of functional components.

Symptoms

Side window does not respond to control buttons (neither driver nor passenger side); window moves slower than normal or stops halfway; a click is heard or no sound when trying to raise/lower the window; the body malfunction indicator light may illuminate on the dashboard.

Possible causes

• Faulty or burned-out power window motor • Open or short circuit in the wiring harness leading to the window motor (especially in the door flex area) • Blown fuse in the power window circuit • Faulty window control switch (master or individual) • Corrosion or poor contact in the window motor electrical connector • Faulty Body Control Module (BCM) – less common

Affected systems

Elektryczne szyby boczneModuł sterowania nadwoziem (BCM)Instalacja elektryczna drzwiUkład sterowania oknem

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Does code B0315 require professional diagnostics?

The code alone is not enough. To find the cause, you need to read live data, check freeze frame conditions, and compare with vehicle behavior. Book a diagnostic session.