DTC B2573: Hatch Release Switch Circuit: Description

WARNING: This page is about a different car, the 2000 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

Foglight/rear compartment lid/hatch release switch supplies a direct battery input to Body Control Module (BCM) when switch is pressed. This input allows BCM to detect a hatch release request. If BCM detects battery voltage on hatch release circuit (Black wire), BCM will energize hatch release relay. BCM monitors circuit to determine how long voltage is applied.

DTC B2573 will set when BCM detects battery voltage in circuit for longer than 60 seconds. No driver warning message will be displayed. If conditions for malfunction no longer exist, history DTC will clear after 50 consecutive ignition cycles. DTC B2573 will also clear when conditions no longer exist. DTCs can be manually cleared using scan tool or Instrument Panel Cluster (IPC).

NOTE: If DTC B2573 is a history code, problem may be intermittent. Wiggle wires while performing the following test.