Code Definition

B2604 — Power Sliding Door On/Off Switch Open Circuit

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

About B2604

B2604 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 B2604 is stored, the module has detected an open (broken or disconnected) electrical path in the monitored circuit.

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 B2604 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

Most power sliding door systems include a main enable switch, usually located on the instrument panel or overhead console, that lets the driver turn powered door operation on or off, often used as a child safety lockout. The power sliding door (PSD) control module reads the state of this switch through a signal circuit. DTC B2604 is set when the module detects an open circuit in the on or off switch input and can no longer read a valid switch state. This is typically caused by a failed switch, an open in the signal wiring, or a connector fault rather than a problem with the door hardware itsel...

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