Circuit Description

Master window switch provides input to Left Door Control Module (LDCM) when right window switch on master switch assembly is depressed to UP or DOWN position. This input allows LDCM to detect a right window up or down request. LDCM provides both power and ground to both window switches on master switch assembly. When right window switch on master switch assembly is depressed to UP or DOWN position, ground is supplied through right window switch and right window up or down input is pulled low. When LDCM detects low voltage on right window up or down switch input circuit, LDCM will send a message over serial data line to RDCM to command right window up or down direction. When switch is released, LDCM will send a second message to RCDM to command right window to stop (window express down feature not activated). LDCM monitors both right window input circuits and determines how long ground had been applied. If ground is applied for longer than expected, a malfunction is present and a DTC will set.

DTC B2206 will set if LDCM detects a low voltage level (short to ground) at right window up switch input circuit. This condition must exist for more than 20 seconds. DTC B2206 will store as a history code in RDCM memory. No driver warning will be displayed.

Under all fault conditions, DTC B2206 will clear automatically when LDCM no longer detects a low voltage level (short to ground) at right window up switch input circuit for longer than 20 seconds. Current and history DTCs can be cleared using scan tool or on-board diagnostics.