2010 Cadillac CTS Sedan AWD V6-3.6L Page 280
Conditions for Running the DTC
* Battery voltage must be between 9-16 V.
* Ignition ON.
* Headlamps ON.
Conditions for Setting the DTC
The headlamp control module detects a pitch angle that is physically unachievable by the vehicle for 3 consecutive monitoring cycles.
Action Taken When the DTC Sets
When DTC B1010 52 sets as current, the following actions are taken:
* If the headlamp leveling actuators have positioned the headlamps above the nominal level, the headlamp level controller will drive the
headlamps to the nominal setting.
* If the headlamp leveling actuators have positioned the headlamps below the nominal level, the headlamp level controller will disable the
headlamp leveling actuators and maintain the lower than nominal level.
Conditions for Clearing the DTC
* The condition responsible for setting the DTC no longer exists.
* A history DTC will clear once 50 consecutive malfunction free ignition cycles have occurred.
Diagnostic Aids
Note: The headlamp control module is not capable of detecting an actual mechanical failure of the suspension position sensors. When the
headlamp control module determines that the vehicle pitch angle is physically impossible, the headlamp control module will assume that a
mechanical failure has occurred to one of the suspension position sensors.
Reference Information
Schematic Reference
Headlights/Daytime Running Lights (DRL) Schematics (See: Diagrams/Electrical Diagrams/Lighting and Horns/System
Diagram/Headlights/Daytime Running Lights (DRL) Schematics)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
Exterior Lighting Systems Description and Operation (See: Lighting and Horns/Description and Operation/Exterior Lighting Systems Description
and Operation)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit
Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Wiring Repairs/Wiring Repairs)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Testing
1. Ignition OFF, disconnect the front headlamp leveling sensor arm from the ball and socket.
2. Ignition ON, headlamps ON, observe the appropriate scan tool Headlamp Control Module Motor Position Status parameter while moving the
front headlamp leveling sensor arm up and down. The reading should change as the arm is moved.
瀚慖f the reading does not change, replace the front headlamp leveling sensor.
3. Connect the front headlamp leveling sensor arm to the ball and socket.
4. Ignition OFF, disconnect the rear headlamp leveling sensor arm from the ball and socket.
5. Ignition ON, headlamps ON, observe the appropriate scan tool Headlamp Control Module Motor Position Status parameter while moving the
rear headlamp leveling sensor arm up and down. The reading should change as the arm is moved.
瀚慖f the reading does not change, replace the rear headlamp leveling sensor.
