DTC B2587: Column Lock/Unlock Drive "A" (Open Or Short To Ground): Notes

BCM provides steering column control function that allows steering column to be electronically locked or unlocked. BCM can supply a ground or battery output on column lock/unlock drive "A" circuit depending on desired steering column motor position. BCM controls motor position based on input information, which includes ignition position; key-in-ignition status; system voltage; and information sent from steering column feedback switch, PASS-Key(R) system and PCM.

BCM uses steering column feedback switch to monitor motor position, and to determine if commanded position was accomplished. BCM continuously monitors column lock/unlock drive "A" circuit No. 1603 (Orange wire).

DTC B2587 will set when BCM detects an internal malfunction (short to ground or open) in column lock/unlock drive "A" or an open in circuit No. 2540 (Orange wire) for 100 milliseconds. IPC will display SERVICE COLUMN LOCK message. If conditions for malfunction no longer exist, history DTC will clear after 50 consecutive ignition cycles. DTC B2587 will also clear when conditions no longer exist, or when IPC or scan tool is used to clear codes.