2010 Cadillac Truck SRX AWD V6-3.0L Page 661
Circuit/System Description
The front and rear suspension position sensors provide the headlamp control module with front and rear suspension position information. Each
sensor receives a 5V reference, signal, and low reference circuits from the headlamp control module. The sensors are connected to the control arms
at the front and rear suspension. As the vehicle travels, the suspension compresses and rebounds moving the suspension position sensor arms. This
causes the signal output of the sensors to change. The headlamp control module compares the information from the front and rear suspension
position sensors and adjusts the headlamp leveling as needed.
Conditions for Running the DTC
* Battery voltage must be between 9-16 V.
* The ignition is in the ON or RUN position.
* The headlamps are ON.
Conditions for Setting the DTC
B3410 01 or B3420 01
The headlamp leveling control module detects a short to battery on the sensor signal line.
B3410 06 or B3420 06
The headlamp leveling control module detects a short to ground or an open/high resistance on the sensor signal line.
Action Taken When the DTC Sets
* The headlamp control module disables the headlamp leveling system.
* The driver information center will display Service AFL Lamp message.
Conditions for Clearing the DTC
* The DTC will be current for as long as the fault is present.
* When the fault is no longer present, the DTC will be a history DTC.
* A history DTC will clear after 50 ignition cycles.
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/Connector End Views By Name)
Description and Operation
Exterior Lighting Systems Description and Operation (See: Lighting and Horns/Description and Operation/Exterior Lighting Systems)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
