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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Courtesy Lamp Control
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2
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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.
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 scan tool information
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Circuit/System Verification
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1.
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Ignition ON, observe the scan tool Door Ajar Switch parameter while opening and closing each vehicle door. The parameter should change between Inactive and Active.
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3.
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Observe the scan tool Rear Closure Ajar Switch parameter while opening and closing the rear liftgate. The parameter should change between Active and Inactive.
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5.
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Cycle the dome lamp switch while observing the scan tool Interior/Courtesy Lighting Master Switch parameter. The parameter should change between Cancel, ON and Door.
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6.
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If the parameter does not change, refer to Dome Lamp Switch Malfunction.
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7.
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Command the Courtesy Lamps ON and OFF with a scan tool. The courtesy lamps should turn ON and OFF when changing between the commanded states.
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8.
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If the courtesy lamps do not turn ON and OFF when changing between the commanded states, refer to Courtesy Lamp Malfunction.
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9.
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Command the Courtesy Lamps ON and OFF with a scan tool. The reading lamps should turn ON and OFF while changing between the commanded states.
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10.
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If the reading lamps do not turn ON and OFF when changing between the commanded states, refer to Reading Lamp Malfunction.
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11.
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Command the Cargo Lamp ON and OFF with a scan tool. The cargo lamps should turn ON and OFF when changing between the commanded states.
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12.
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If the cargo lamps do not turn ON and OFF when changing between the commanded states, refer to Cargo Lamp Malfunction.
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13.
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Turn the sunshade lamp ON and OFF by using the sunshade lamp switch. The sunshade lamp should turn ON and OFF while changing between the selected states.
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14.
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If the sunshade lamp does not turn ON and OFF when changing between the selected states, refer to Sunshade Illumination Malfunction.
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15.
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Turn the instrument panel compartment lamp ON and OFF by using the instrument panel compartment lamp switch. The instrument panel compartment lamp should turn ON and OFF while changing between the selected states.
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16.
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If the instrument panel compartment lamp does not turn ON and OFF when changing between the selected states, refer to Instrument Panel Compartment Lamp Malfunction.
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Dome Lamp Switch Malfunction
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1.
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Ignition OFF, disconnect the harness connector at the S12 dome lamp switch.
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2.
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Scan tool disconnected, doors CLOSED, interior lamps OFF, test for less than 30 Ω between the ground circuit terminal 1 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 not the specified value, test the signal circuit terminal 2 for a short to ground. If the circuit tests normal, replace the K9 BCM.
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6.
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Verify the scan tool Interior/Courtesy Lighting Master Switch parameter is Door.
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7.
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If not the specified value, test the signal circuit terminal 3 for a short to ground. If the circuit tests normal, replace the K9 BCM.
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8.
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Connect a 3 A fused jumper wire between the signal circuit terminal 2 and ground. Verify the scan tool Interior/Courtesy Lighting Master Switch parameter is Cancel.
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9.
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If not the specified value, test the signal circuit for a short to B+ or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
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10.
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Connect a 3 A fused jumper wire between the signal circuit terminal 3 and ground. Verify the scan tool Interior/Courtesy Lighting Master Switch parameter is On.
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11.
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If not the specified value, test the signal circuit for a short to B+ or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
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12.
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If all circuits test normal, replace the S12 dome lamp switch.
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Courtesy Lamp Malfunction
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1.
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Disconnect the harness connector at the appropriate courtesy lamp.
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2.
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Ignition OFF, scan tool OFF, doors CLOSED, interior lamps OFF, test for less than 5.0 Ω between the ground circuit terminal listed below and ground:
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Instrument Panel Courtesy Lamp - terminal 2
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Door Courtesy Lamp - terminal 2
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Overhead Console Courtesy/Reading Lamp - terminal 2
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Rear Courtesy/Reading Lamp - terminal B
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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 terminal listed below and ground:
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Instrument Panel Courtesy Lamp - terminal 1
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Door Courtesy Lamp - terminal 1
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Overhead Console Courtesy/Reading Lamp - terminal 3
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Rear Courtesy/Reading Lamp - terminal C
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5.
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Command the Courtesy Lamps ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
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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 an open/high resistance. If the circuit tests normal, replace the K9 BCM.
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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 BCM.
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8.
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If all circuits test normal, replace the courtesy lamp.
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Reading Lamp Malfunction
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1.
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Ignition OFF, disconnect the harness connector at the appropriate reading lamp.
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2.
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Test for less than 5 Ω between the ground circuit terminal listed below and ground.
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Overhead Console Courtesy/Reading Lamps - terminal 2
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Rear Courtesy/Reading Lamps - terminal B
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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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Verify a test lamp illuminates between the control circuit terminal listed below and ground:
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Overhead Console Courtesy/Reading Lamps - terminal 1
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Rear Courtesy/Reading Lamps - terminal A
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5.
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If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
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6.
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If all circuits test normal, test or replace the reading lamp.
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Cargo Lamp Malfunction
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1.
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Ignition OFF, disconnect the harness connector at the appropriate cargo lamp.
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2.
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Ignition OFF, scan tool OFF, doors CLOSED, interior lamps OFF, test for less than 5.0 Ω between the ground circuit terminal listed below and ground:
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Cargo Lamp - terminal 2
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Liftgate Courtesy Lamp - terminal 2
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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 terminal listed below and ground. The test lamp should turn ON when connected.
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Cargo Lamp - terminal 1
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Liftgate Courtesy Lamp - terminal 1
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5.
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Command the Cargo Lamp ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
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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 an open/high resistance. If the circuit tests normal, replace the K9 BCM.
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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 BCM.
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8.
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If all circuits test normal, replace the cargo lamp.
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Sunshade Illumination Malfunction
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1.
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Ignition OFF, disconnect the harness connector at the A3 sunshade.
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2.
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Test for less than 5 Ω between the ground circuit terminal B 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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Verify a test lamp illuminates between the control circuit terminal A and ground.
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5.
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If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
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6.
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If all circuits test normal, test or replace the A3 sunshade.
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Instrument Panel Compartment Lamp Malfunction
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1.
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Ignition OFF, disconnect the harness connector at the E27 instrument panel compartment lamp.
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2.
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Open the instrument panel compartment.
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3.
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Verify that a test lamp illuminates between B+ and the ground circuit terminal 2.
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4.
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If the test lamp does not illuminate, test the ground circuit for an open/high resistance.
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5.
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Verify a test lamp illuminates between the control circuit terminal 1 and ground.
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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 an open/high resistance. If the circuit tests normal, replace the K9 BCM.
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7.
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If all circuits test normal, replace the E27 instrument panel compartment lamp.
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Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.
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Refer to the appropriate replacement procedure for the lighting component that requires replacement.
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