Door Sill Illumination Malfunction
Door Sill Illumination Malfunction
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions) provides an overview of each diagnostic category.
Diagnostic Fault Information
Circuit/System Description
When the BCM receives a signal to command the courtesy lamps ON, it applies battery voltage through the dome/courtesy lamps control circuit to the courtesy lamps. The door sill illumination receives voltage through the courtesy lamps circuit. The door sill illumination harness connector includes a power inverter which converts the battery voltage to 150 V AC (550 Hz). This AC voltage is supplied to the door sill lamps and causes them to illuminate.
Reference Information
Schematic Reference
Interior Lights Schematics (Interior Lights Schematics)
Connector End View Reference
Component Connector End Views (Connector Views)
Description and Operation
Interior Lighting Systems Description and Operation (Interior Lighting Systems Description and Operation)
Electrical Information Reference
* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)
Scan Tool Reference
Control Module References (Programming and Relearning) for scan tool information
Circuit/System Verification
1. Observe the vehicle entry courtesy lamps while opening and closing the driver door. The entry courtesy lamps should turn ON the door is opened and OFF when the door is closed.
• If the entry courtesy lamps do not change between the selected states, refer to Courtesy Lamps Malfunction (Courtesy Lamps Malfunction).
2. Observe the door sill plate lamps while opening and closing the driver door. The door sill plate lamps should turn ON when the door is opened and turn OFF when the door is closed.
• If a single door sill plate lamp does not change between the selected states, replace the appropriate door sill plate lamp component.
• If all of the door sill plate lamps do not change between the selected states, refer to Circuit/System Testing.
Circuit/System Testing
Warning
DC and AC high-voltage is present. To reduce the risk of severe shocks and burns, the high-voltage system should be disabled any time service work is being performed on or around the high-voltage system. When in doubt, always disable the high-voltage system. The 12-volt system will still be active after the high-voltage system has been disabled.
1. Ignition OFF, verify door sill plate lamp ground circuit 1150 is securely connected to the driver side kick panel ground stud.
• If the door sill plate lamp ground circuit is not securely connected, repair the poor connection.
2. Disconnect the X2 (blue) harness connector at the BCM.
3. Using the appropriate test tool, connect a test lamp between the control circuit terminal 5 at the BCM and ground.
4. Ignition ON, turn the door sill plate lamp ON and OFF by opening and closing the vehicle door. The test lamp should turn ON and OFF when changing between the selected states.
• If the test lamp is always ON or OFF, replace the BCM.
5. If all circuits test normal, replace the door sill plate lamp kit.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
Control Module References (Programming and Relearning) for BCM replacement, setup, and programming