2010 Cadillac CTS Sedan AWD V6-3.6L Page 586

2010 Cadillac CTS Sedan AWD V6-3.6L Page 586

The headlamp control module detects an overheating condition on any of the right motor control circuits.

Actions Taken When the DTC Sets

* When DTC B3435 or DTC B3440 sets, the headlamp control module will attempt to return the lamps to a nominal position and disable all

requests to all headlamp actuators.

* The driver information center (DIC) will display AFL Lamps Need Service.

Conditions for Clearing the DTC

* The condition responsible for setting the DTC no longer exists and the ignition is cycled.

* 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.

2. Remove the AFS 15 A fuse.

3. Ignition OFF, scan tool OFF, test for 10 ohm -25k ohm between each control circuit terminal listed below and ground.

* Headlamp leveling motor control terminal 1

* Headlamp leveling motor control terminal 2

* Headlamp leveling motor control terminal 3

* Headlamp leveling motor control terminal 4

瀚慖f greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal,

replace the headlamp control module.

瀚慖f less than the specified range, test the control circuit for a short to ground. If the circuit tests normal, replace the headlamp control

module.

4. Install the AFS 15 A fuse.

5. Ignition ON, scan tool OFF, headlamps ON, verify that a test lamp does not illuminate between each control circuit terminal listed below and

ground.

* Headlamp leveling motor control terminal 1

* Headlamp leveling motor control terminal 2

* Headlamp leveling motor control terminal 3

* Headlamp leveling motor control terminal 4

瀚慖f the test lamp illuminates, test the control circuit for a short to voltage. If the circuit tests normal, replace the headlamp control module.

6. If all circuits test normal, replace the headlamp assembly.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.