Code Definition

B2602 — Missing Latch Signal During Power Sliding Door Unlatch

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

About B2602

B2602 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.

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 B2602 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

A power sliding door begins its opening cycle by energizing the latch release actuator to unlatch the door before the main drive unit slides it open. The control module monitors the latch ratchet and pawl position switch to confirm the latch has actually released. DTC B2602 is set when, during the power unlatch phase, the module does not receive the expected latch position signal showing the latch has moved from the latched to the unlatched state. This can be caused by a faulty latch position switch, a release actuator that failed to move the latch, a mechanically bound latch, or wiring proble...

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