Courtesy Lamps Malfunction
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Courtesy Lamps Malfunction
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Diagnostic Fault Information
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Circuit
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Short to Ground
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Open/High Resistance
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Short to Voltage
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Signal Performance
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Dome/Courtesy Lamp Control
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B2615 02
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2
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1
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-
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Dome/Courtesy Lamp Control
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2
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2
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1
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-
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Courtesy Lamps Control
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-
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2
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-
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-
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1. Dome/Courtesy Lamps Always Illuminated
2. Dome/Courtesy Lamps Do Not Illuminate
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Circuit/System Description
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Battery voltage for the courtesy lamps is supplied at all times to the body control module (BCM). When the BCM receives a signal to command the courtesy lamps ON, it then applies voltage through the dome/courtesy lamps control circuit to the courtesy lamps listed below.
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Dome/Reading Lamps - Row
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Accent Lamp - Left Lower Instrument Panel
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•
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Accent Lamp - Right Lower Instrument Panel
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•
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Accent lamp - driver seat
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•
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Accent lamp - passenger seat
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•
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Accent Lamp - Driver Door Handle
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•
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Accent Lamp - Passenger Door Handle
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Schematic Reference
Interior Lights Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Interior Lighting Systems Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References
for information on diagnostic tools
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Circuit/System Verification
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1.
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Observe the driver information center while opening and closing each vehicle door. The driver information center should display the door ajar message only when the door is open.
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3.
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If the door ajar is functioning normal, refer to Courtesy Lamp Circuit Malfunction.
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4.
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Ignition ON, cycle the Dome/Reading Lamps switch in all positions, observe the scan tool Interior/Courtesy Lighting Master Switch parameter. The parameter should change between Door, Cancel and On.
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Courtesy Lamp Circuit Malfunction
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1.
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Ignition OFF, disconnect the harness connectors at the appropriate inoperative backlighting component.
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2.
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Test for less than 5 Ω between the black wire of the component and ground.
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3.
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If greater than the specified range, test the ground circuit for an open/high resistance.
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4.
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Connect a test lamp between the control circuit of the component grey wire and ground.
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5.
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Command the Courtesy Lamps Dimming ON and OFF with a scan tool.
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6.
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If the test lamp is always OFF, test the control circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the K9 Body Control Module.
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7.
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If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 Body Control Module.
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8.
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If all circuit test normal, test or replace the appropriate inoperative component.
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Sunroof Console Dome Lamp Switch Malfunction
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1.
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Ignition OFF, disconnect the harness connector at the E37F Dome/Reading Lamps - Front.
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2.
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Test for less than 5 Ω between the ground circuit terminal 6 and ground.
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3.
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If greater than the specified range, test the ground circuit for an open/high resistance.
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4.
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Ignition ON, verify the scan tool Interior/Courtesy Lighting Master Switch parameter is Door.
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5.
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If the scan tool Dome Lamp Switch parameter is Cancel, test the dome lamp defeat signal circuit terminal 4 for short circuit to ground. If the circuit tests normal, replace the K9 Body Control Module.
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6.
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If the scan tool Dome Lamp Switch parameter is On, test the dome lamp on signal circuit terminal 5 for short circuit to ground. If the circuit tests normal, replace the K9 Body Control Module.
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7.
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Install a 3 A fused jumper wire between the dome defeat signal circuit terminal 4 and the ground circuit terminal 6. Verify the scan tool Interior/Courtesy Lighting Master Switch parameter is Cancel.
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8.
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If not the specified state, test the dome lamp defeat signal circuit for short circuit to voltage or an open/high resistance. If the circuit tests normal, replace the K9 Body Control Module.
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9.
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Install a 3 A fused jumper wire between the dome lamp on signal circuit terminal 5 and the ground circuit terminal 6. Verify the scan tool Interior/Courtesy Lighting Master Switch parameter is On.
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10.
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If not the specified state, test the dome lamp on signal circuit for short circuit to voltage or an open/high resistance. If the circuit tests normal, replace the K9 Body Control Module.
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11.
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If all circuits test normal, test or replace the E37F Dome/Reading Lamps - Front.
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Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.
