Circuit Description

WARNING: This page is about a different car, the 2000 Chevrolet Corvette and 1999 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

Left Door Control Module (LDCM) provides left motor control output functions. This output control allows LDCM to command left window up or down. Left window switch on master switch assembly provides an input to LDCM when left window switch is depressed to UP or DOWN position. When LDCM detects an active window command from left window switch, LDCM will command left window motor in appropriate direction. LDCM applies ground and voltage to appropriate circuits (Dark Blue wire or Brown wire) depending on desired direction. LDCM monitors amount of current draw on left window motor circuit. If current draw is not within acceptable range, a malfunction is present and DTC will set.

DTC B2274 will set if LDCM detects a short to voltage condition in left window motor control circuit when left window motor is not activated. This condition must exist for more than 20 seconds. DTC B2274 will store as a history code in LDCM memory. No driver warning will be displayed.

Under all fault conditions, DTC B2274 will clear automatically when LDCM no longer detects a short to voltage in left window motor control circuit for longer than 120 milliseconds. Current and history DTCs can be cleared using scan tool or on-board diagnostics.