• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
Dome Lamp Switch Signal | 3 | 3 | 3 | -- |
Left Front Door Open Switch Signal | 4 | 4 | 4 | -- |
Right Front Door Open Switch Signal | 4 | 4 | 4 | -- |
Courtesy Lamp Control | B1480 00 | 1, 2 | -- | -- |
Courtesy Lamp Control - Left Door | 2 | 2 | 2 | -- |
Courtesy Lamp Control - Right Door | 2 | 2 | 2 | -- |
Courtesy Lamp Switch - Console Control | 2 | 2 | -- | -- |
Courtesy Lamp Low Control | 2 | 1, 2 | 1, 2 | -- |
Courtesy Lamp - Left Door Ground | -- | 2 | -- | -- |
Courtesy Lamp - Right Door Ground | -- | 2 | -- | -- |
Courtesy Lamp Switch - Console Ground | -- | 2 | -- | -- |
Driver Information Center (DIC) Switch Ground | -- | 3 | -- | -- |
I/P Compartment Lamp Ground | -- | 2 | -- | -- |
Rear Compartment Lid Latch Assembly Ground | -- | 2 | -- | -- |
Rear Compartment Lid Pull Down Actuator Ground | -- | 2 | -- | -- |
Underhood Lamp Ground | -- | 2 | -- | -- |
Vanity Mirror Lamp - Right Ground | -- | 2 | -- | -- |
Vanity Mirror Lamp - Left Ground | -- | 2 | -- | -- |
1. Rearview Mirror Lamps Inoperative - Inside 2. Courtesy Lamps Malfunction 3. Dome Lamp Switch Malfunction 4. Door Open Switch Malfunction |
The INTERIOR LIGHTS fuse supplies battery voltage to the body control module (BCM). The BCM applies battery voltage to the courtesy lamps through the courtesy lamp supply voltage circuit. When any door is opened, the jam switch contacts close and the BCM receives a door-open input. If the BCM receives a door lock or unlock input or a rear hatch open input, the BCM will activate the courtesy lamp supply voltage circuit, providing battery voltage to all of the instrument panel (I/P) courtesy lamps, rearview mirror lamps, and rear compartment lamps. The courtesy lamps can be manually activated by placing the interior lamp switch in the DOME position. The BCM also provides a serial data message to the driver door module (DDM) and passenger door module (PDM) to apply battery voltage to the courtesy lamps located on each door.
Interior Lighting Systems Description and Operation
Control Module References for scan tool information
⇒ | If the reading does not change between the commanded states, refer to Dome Lamp Switch Malfunction. |
⇒ | If the reading does not change between the commanded states, refer to Door Open Switch Malfunction. |
⇒ | If the reading does not change between the commanded states, refer to Door Open Switch Malfunction. |
⇒ | If the test lamp does not illuminate, test the ground circuit for an open/high resistance, if the circuit tests normal, replace the console lamp switch. |
⇒ | If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM. |
⇒ | If the test lamp does not illuminate, test the ground circuit for an open/high resistance. If the circuit tests normal, replace the IPC. |
⇒ | If not the specified value, test the signal circuit terminal 4 for a short to ground. If the circuit tests normal, replace the IPC. |
⇒ | If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the IPC. |
⇒ | If the test lamp does not illuminate, test the ground circuit for an open/high resistance. |
⇒ | If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the appropriate door control module. |
⇒ | 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 appropriate door control module. |
• | Driver door latch ground terminal 8 |
• | Passenger door latch ground terminal 3 |
⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
⇒ | If not the specified value, test the appropriate signal circuit terminal listed below for a short to ground. If the circuit tests normal, replace the BCM. |
• | Driver door open switch signal terminal 7 |
• | Passenger door open switch signal terminal 2 |
• | Driver door open switch signal terminal 7 |
• | Passenger door open switch signal terminal 2 |
⇒ | If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM. |
⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
⇒ | If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM. |
⇒ | If 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 BCM. |
⇒ | If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM. |
⇒ | If the test lamp remains ON at all times, test the control circuit terminal B for a short to ground. If the circuits test normal, replace the BCM. |
⇒ | If greater than the specified range, test the ground circuit for an open/high resistance, if the circuits test normal, replace the rear compartment lid pull down actuator. |
⇒ | If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM. |
⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
⇒ | If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM. |
⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
⇒ | If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for BCM, DDM, IPC, or PDM replacement, setup, and programming |