2010 Cadillac CTS Sedan AWD V6-3.6L Page 581
* A history DTC will clear once 50 consecutive malfunction-free cycles have occurred.
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 harness connector at the appropriate headlamp leveling sensor.
2. Ignition OFF, test for less than 10.0 ohm between the low reference circuit terminal C and ground.
瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the
headlamp control module.
3. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal A and ground.
瀚慖f less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,
replace the headlamp control module.
瀚慖f greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the headlamp
control module.
4. Verify the appropriate scan tool Leveling Position Sensor parameter is less than 0.5 V.
瀚慖f greater than the specified range, test the signal circuit terminal B for a short to voltage. If the circuit tests normal, replace the headlamp
control module.
5. Install a 3 A fused jumper wire between the signal circuit terminal B and the 5 V reference circuit terminal A. Verify the appropriate scan
tool Leveling Position Sensor parameter is greater than 4.8 V.
瀚慖f less than the specified range, test the signal circuit for short to ground or an open/high resistance. If the circuit tests normal, replace the
headlamp control module.
6. If all circuits test normal, replace the headlamp leveling sensor.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Headlamp Leveling Front Suspension Height Sensor Replacement (See: Lighting and Horns/Headlamp/Service and Repair/Removal and
Replacement/Headlamp Leveling Front Suspension Height Sensor Replacement)
* Headlamp Leveling Rear Suspension Height Sensor Replacement (See: Lighting and Horns/Headlamp/Service and Repair/Removal and
Replacement/Headlamp Leveling Rear Suspension Height Sensor Replacement)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for headlamp control module replacement, setup,
and programming
B3435
DTC B3435 or B3440 (Base)
