Normal Operation
WARNING: This page is about a different car, the 2011 Lincoln MKT. However, it is still accessible from the selected car via links, so may be relevant.
The adaptive cruise control system is enabled when the vehicle speed is set and the Cruise-Control Module (C-CM), which is a radar sensor unit, determines the distance and relative speed of the vehicle that is in the path of travel. The C-CM commands the ABS module over the High Speed Controller Area Network (HS-CAN), which controls the brakes, to automatically apply the brakes to slow the vehicle to maintain a safe distance to the vehicle ahead. The brake lamp control circuit is pulled low by the ABS module, which controls the brake lamp relay. This activates the brake lamps when the brakes are applied for the adaptive cruise control system.
- DTC C1105 (Traction Control Disable Lamp Circuit Short To Battery) - sets when the ABS module detects a short to ground or a short to battery voltage on the brake lamp control circuit.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Brake lamp relay
- ABS module