Pinpoint Test N : The Headlamp Control Module (HCM) Does Not Respond To The Diagnostic Scan Tool: Notes

WARNING: This page is about a different car, the 2015 Lincoln MKZ. However, it is still accessible from the selected car via links, so may be relevant.

Refer to Module Communications Network for schematic and connector information.

Refer to Headlamps/Autolamps for schematic and connector information.

Normal Operation and Fault Conditions

The Headlamp Control Module (HCM) communicates with the diagnostic scan tool through the HS-CAN1.

Possible Causes

Fuse
Wiring, terminals and connector
Headlamp Control Module (HCM)

Visual Inspection and Diagnostic Pre-checks

Verify BCM fuse 20 (5A) is OK.