Cargo Lamps Malfunction
Diagnostic Instructions
Diagnostic Fault Information
Circuit
|
Short to Ground
|
Open/High Resistance
|
Short to Voltage
|
Signal Performance
|
Cargo Lamp Control
|
B2570 02
|
1
|
2
|
-
|
1. Cargo lamp inoperative
2. Cargo lamp always ON
|
|
| |
Circuit/System Description
When the body control module (BCM) receives a trunk open signal,
the BCM supplies B+ to the cargo lamp control circuit. This will
illuminate the cargo lamp.
Reference Information
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
Circuit/System Verification
Observe the driver information center while opening and closing
the trunk. The driver information center should display the trunk
ajar message only when the trunk is open.
If the driver information center displays the trunk ajar message
when a trunk is closed, refer to
Door Ajar Indicator Malfunction .
Circuit/System Testing
Note: If the liftgate is
opened after all the modules go to sleep, the dome light will not
come on. The liftgate ajar switch input to the BCM will not wake up
the BCM once it has gone to sleep, so the dome light will not come
on. Once the BCM gets an input to wake it up, from remote keyless
entry or a door handle, the dome light will turn on when the
liftgate is opened.
| 1. |
Ignition OFF, disconnect the
harness connector at the E8S Rear Compartment Courtesy Lamp.
|
| 2. |
Test for less than 5 Ω
between the ground circuit terminal 2 and ground. |
| ⇒ |
If greater than the specified range, test the
ground circuit for an open/high resistance. |
| 3. |
Connect a test lamp between
the E8S Rear Compartment Courtesy Lamp control circuit terminal 1
and ground. |
| 4. |
The test lamp should turn ON
when the trunk is open and OFF when the trunk is closed.
|
| ⇒ |
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. |
| ⇒ |
If the test lamp is always OFF, test the control
circuit for a short to round or open/high resistance. If the
circuit tests normal, replace the K9 Body Control Module. |
| 5. |
If all circuits test normal,
replace the E8S Rear Compartment Courtesy Lamp. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
|
