DEFINITION: The I/P courtesy lamps and ignition switch illumination bulb stay on with all doors closed, the I/P lamp dimmer switch off, and none of the interior lighting modes activated. However, the inadvertent load (battery rundown) protection turns off the courtesy lamps after 20 minutes.

Was the BCM diagnostic system check performed?

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Go to Step 2

Go to Diagnostic System Check - Body Control System in Body Control System

1. Make sure the I/P lamp dimmer switch is off.
2. Close all the vehicle doors.
3. Turn the ignition switch off.
4. Connect a scan tool to the Data Link Connector (DLC).
5. Turn the ignition switch on.
6. Using the scan tool, monitor the status of the THEATER DIM 1.

Does scan tool display that the status of the THEATER DIM 1 is off?

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Go to Step 3

Go to Step 7

1. Turn the ignition switch off.
2. Disconnect the BCM connectors C2 and C3.
3. Using a DMM, measure the resistance between the BCM harness connector C2 terminal B1 and ground.

Is the resistance within the specified range?

∞

Go to Step 4

Go to Step 5

1. Reconnect the BCM connectors C2 and C3.
2. Turn the ignition switch on.
3. Make sure the I/P lamp dimmer switch is in off.
4. Close all the vehicle doors.
5. Observe the I/P courtesy lamps.

Are the I/P courtesy lamps off?

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Go to Step 6

Go to Step 7

Repair short to ground in circuit 156.

Is the repair complete?

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Go to Step 8

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The malfunction is not present at this time. Refer to Interior Lights Circuit Description for more information regarding the operation of the courtesy lamps.

Is the action complete?

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Go to Step 8

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1. Replace the BCM. Refer to Body Control Module Replacement in Body Control System for service procedures.
2. After BCM replacement, perform the Setup New BCM procedure. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System.

Is the repair complete?

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Go to Step 8

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1. Turn the ignition switch off.
2. Reinstall the connectors/components removed.
3. Check for BCM DTCs. Refer to Diagnostic Trouble Code (DTC) Displaying in Body Control System.

Are there any DTCs stored in the BCM?

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Go to Diagnostic System Check - Body Control System in Body Control System

System OK

DEFINITION: The courtesy lamps stay on with all doors closed, the I/P lamp dimmer switch off, and none of the interior lighting modes activated. However, the inadvertent load (battery rundown) protection turns off the courtesy lamps after 20 minutes.

Was the BCM diagnostic system check performed?

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Go to Step 2

Go to Diagnostic System Check - Body Control System in Body Control System

1. Make sure the I/P lamp dimmer switch is off.
2. Close all the vehicle doors.
3. Turn the ignition switch off.
4. Connect scan tool to the Data Link Connector (DLC).
5. Turn the ignition switch on.
6. Using scan tool, monitor status of the DRIVER DOOR SWITCH.

Does the scan tool display that the status of the DRIVER DOOR SWITCH is CLOSED?

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Go to Step 3

Go to Step 9

1. Make sure all the vehicle doors remain closed.
2. Using scan tool, monitor the status of the DOOR JAMB SWITCH.

Does scan tool display that the status of the DOOR JAMB SWITCH is OFF?

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Go to Step 4

Go to Step 10

1. Make sure all vehicle doors remain closed.
2. Using scan tool, monitor the status of the COURTESY SWITCH.

Does the scan tool display that the status of the COURTESY SWITCH is OFF?

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Go to Step 5

Go to Step 11

1. Turn the ignition switch off.
2. Disconnect the BCM connector C1.
3. Make sure the driver's door remain fully closed when performing next step.
4. Using a DMM, measure the resistance between the BCM harness connector C1 terminal D16 and ground.

Is the resistance measured same as the specified value?

∞

Go to Step 6

Go to Step 9

1. Make sure that all the vehicle doors remain fully closed when performing next step.
2. Using a DMM, measure the resistance between the BCM harness connector C1 terminal C16 and ground.

Is the resistance measured same as the specified value?

∞

Go to Step 7

Go to Step 10

1. Make sure the I/P lamp dimmer switch is off when performing the next step.
2. Using a DMM, measure the resistance between the BCM harness connector C2 terminal D15 and ground.

Is the resistance measured same as the specified value?

∞

Go to Step 19

Go to Step 11

1. Reconnect the BCM connectors C2 and C3.
2. Turn the ignition switch on.
3. Make sure the I/P lamp dimmer switch is off.
4. Close all the vehicle doors.
5. Observe the courtesy lamps.

Are the courtesy lamps off?

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Go to Step 12

Go to Step 13

1. Disconnect the LF door lock switch electrical connector.
2. Disconnect the BCM connector C1.
3. Using a DMM, measure the resistance between the BCM harness connector C1 terminal D16 and ground.

Is the resistance measured same as the specified value?

∞

Go to Step 14

Go to Step 15

1. Disconnect the BCM connector C1.
2. Make sure all the vehicle doors remain fully closed when performing the next step.
3. Using a DMM, measure the resistance between the BCM harness connector C1 terminal C16 and ground.
4. Disconnect the LF, RF, LR, and RR door lock switch, one at a time, until the DMM reads ∞ (infinite) resistance.

•	If the DMM shows infinite upon disconnecting one of the door lock switches, then replace that door lock switch.

•	If the DMM does not show infinite after all the door lock switches are disconnected, then repair a short to ground in circuit 727.

Is the repair complete?

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Go to Step 18

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1. Disconnect the I/P lamp dimmer switch electrical connector.
2. Using a DMM, measure the resistance between the BCM harness connector C2 terminal D15 and ground.

Is the resistance measured same as the specified value?

∞

Go to Step 16

Go to Step 17

The malfunction is not present at this time. Refer to Interior Lights Circuit Description for more information regarding the operation of the courtesy lamps.

Is the action complete?

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Go to Step 18

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1. Replace the BCM. Refer to Body Control Module Replacement in Body Control System.
2. After BCM replacement, perform the Setup New BCM procedure. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System.

Is the repair complete?

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Go to Step 18

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Replace the door lock switch.

Is the repair complete?

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Go to Step 18

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Repair short to ground in circuit 49.

Is the repair complete?

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Go to Step 18

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Replace the I/P lamp dimmer switch. Refer to Instrument Panel Multifunction Switch Assembly Replacement in Instrument Panel, Gauges and Console.

Is the repair complete?

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Go to Step 18

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Repair short to ground in circuit 1495.

Is the repair complete?

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Go to Step 18

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1. Turn the ignition switch off.
2. Reinstall the connectors/components removed.
3. Check for BCM DTCs. Refer to Diagnostic Trouble Code (DTC) Displaying in Body Control System.

Are there any DTCs stored in the BCM?

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Go to Diagnostic System Check - Body Control System in Body Control System

System OK

Using a DMM, measure the resistance between the BCM harness connector C1 terminal D14 and ground.

Is the resistance measured same as the specified value?

∞

Go to Step 8

Go to Step 20

1. Leave the DMM connected from previous step.
2. Disconnect the LF and RF door lock switch, one at a time, until the DMM reads ∞ (infinite) resistance.

•	If the DMM shows infinite upon disconnecting one of the door lock switches, then replace that door lock switch.

•	If the DMM does not show infinite after door lock switches are disconnected, then repair a short to ground in circuit 394.

Is the repair complete?

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Go to Step 18

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DEFINITION: The sunshade illuminated mirror lamps stay on when the mirror cover is closed. However, the inadvertent load (battery rundown) protection turns off the sunshade illuminated mirror lamps after 20 minutes.

Replace the sunshade. Refer to Sunroof Sunshade Replacement in Interior Trim.

Is the repair complete?

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System OK

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