Pinpoint Test Al : The Direct Current/Direct Current (Dc/Dc) Converter Control Module Does Not Respond To The Diagnostic Scan Tool: Notes
WARNING: This page is about a different variant/trim than selected.
Refer to CHARGING SYSTEM for schematic and connector information.
Refer to MODULE COMMUNICATIONS NETWORK for schematic and connector information.
Normal Operation and Fault Conditions
The Direct Current/Direct Current (DC/DC) Converter Control Module communicates with the diagnostic scan tool through the HS-CAN1.
Possible Sources
- Fuse
- Wiring, terminals and connectors
- Direct Current/Direct Current (DC/DC) Converter Control Module
Visual Inspection and Diagnostic Pre-checks
- Verify high current BJB MEGA fuse 8 (175A), BJB fuse 52 (15A) and BCM fuse 14 (10A) are OK.
- Diagnose all Diagnostic Trouble Codes (DTCs) set in the BECM, PCM and SOBDMC first. Diagnostic Trouble Codes (DTCs) set in these modules can cause the vehicle to disable the DC/DC wake up circuit, keeping the DC/DC converter control module disabled.