LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Chevrolet >> 2002 >> Impala LS >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Body Control Modules >> Diagnostic Tests >> DTC B1009: Checksum Error In Control Module >> Code Enable Criteria
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Code Enable Criteria

Following criteria must be met to enable DTC; control module runs a program to detect a check-sum error in memory when a power mode change is commanded. Only requirements are voltage and ground.