GM Service Manual Online
For 1990-2009 cars only

Description

System

DEFINITION: The following DTCs will affect theft deterrent and PASS-Key® performance, always diagnosis these DTCs before attempting to diagnose the theft deterrent or PASS-Key® systems:

DTC B2236 Left Door Lock Switch Circuit

LDCM

DTC B2237 Right Door Lock Switch Circuit

RDCM

DTC B2252 Key Cylinder Switch Circuit

LDCM

DTC B2253 Key Cylinder Switch Circuit

RDCM

DTC B2587 Column Lock/Unlock Drive A

BCM

DTC B2588 Column Lock/Unlock Drive A

BCM

DTC B2592 Column Lock/Unlock Drive B

BCM

DTC B2593 Column Lock/Unlock Drive B

BCM

DTC B2721 PASS-Key Detection Circuit

BCM

DTC B2722 PASS-Key Detection Circuit

BCM

DTC B2723 PASS-Key Detection Circuit

BCM

DTC B2735 PASS-Key Programming Mode Active

BCM

DTC P1626 Theft Deterrent Fuel Enable Signal Lost

PCM

DTC P1630 Theft Deterrent Learn Mode Active

PCM

DTC P1631 Theft Deterrent Start Enable Signal Not Correct

PCM

DTC U1000 and DTC U1255 Class 2 Communication Malfunction

ALL

DTC U1001-U1254 Lost Communication with XXX

ALL