Schematic Reference: Body Rear End Schematics

Did you review the Rear Compartment Description and Operation and perform the necessary inspections?

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Go to Step 2

Go to Luggage Compartment Description and Operation

Activate the rear compartment lid release switch, located in the glove compartment, with the vehicle speed below 10 km/h (6 mph) and the doors unlocked.

Does the rear compartment lid open?

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Go to Step 3

Go to Step 2

1. Close the rear compartment lid.
2. While standing within 2 meters (6 feet) of the rear of the vehicle, press the Rear Compartment Lid Release button located on the remote coded key.

Does the rear compartment lid open?

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Go to Step 4

Go to Symptoms - Body Rear End

1. Switch the ignition to OFF.
2. Connect the scan tool to the data link connector.
3. Select Diagnostics/Model Year/Vehicle Model/Body/Body Control Module/Miscellaneous Tests/Rear Compartment.
4. Perform the test as instructed by the scan tool and open the rear compartment lid using the scan tool.

Does the rear compartment lid open?

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Go to Step 5

Go to Step 11

1. With the scan tool connected, exit to the Body Menu and select Data Display/Inputs and Outputs/Rear Compartment Release.
2. While reading the scan tool, press the switch fully to close the switch contacts.

Does the scan tool display OFF with the switch at rest and ON with the switch pressed?

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Go to Step 8

Go to Step 6

Back-probe the ground side of the rear compartment lid release switch with an ohmmeter connected to a known good ground. Refer to Testing for Continuity in Wiring Systems.

Is the value as specified?

Less than 1 ohms

Go to Step 7

Go to Step 16

1. Disconnect the rear compartment lid release switch connector.
2. Probe across the rear compartment release switch terminals with an ohmmeter.
3. While reading the ohmmeter, press the switch to fully close the switch contacts.

Is the value as specified?

Go to Step 17

Go to Step 18

1. Close and unlock the doors.
2. With the scan tool connected, exit to the Body Menu and select BCM Internal Status/Central Door Locking.

Does the scan tool display UNLOCKED?

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Go to Step 9

Go to Symptoms - Doors

With the scan tool connected, exit Central Door Locking and select Security Status.

Does the scan tool display DISARMED?

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Go to Step 10

Go to Diagnostic Starting Point - Theft Deterrent

With the vehicle stationary and the scan tool connected, exit to the Body Menu and select Data Display/Serial Data Inputs/Vehicle Speed.

Does scan tool display 0 mph?

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Go to Step 19

Refer to Vehicle Speed Sensor Circuit

1. Back-probe the body control module (BCM) connector at the BCM trunk solenoid relay output circuit to the rear compartment lid actuator assembly with a voltmeter to ground. Refer to Measuring Voltage in Wiring Systems.
2. Repeat the Rear Compartment Lid Release Test as per step 4.

Are the values as specified?

Go to Step 12

Go to Step 14

1. Back-probe the load side of the rear compartment lid actuator assembly with a voltmeter to ground. Refer to Measuring Voltage in Wiring Systems.
2. Repeat the Rear Compartment Lid Release Test as per step 4.

Are the values as specified?

Go to Step 13

Go to Step 20

Back-probe the ground side of the rear compartment lid release actuator assembly with an ohmmeter connected to a known good ground. Refer to Testing for Continuity in Wiring Systems.

Is the value as specified?

Less than 1 ohms

Go to Step 21

Go to Step 24

Using a voltmeter connected to ground, measure the LOCK PWR battery input to the BCM. Refer to Measuring Voltage in Wiring Systems.

Is the voltage as specified?

Battery Voltage

Go to Step 15

Go to Step 22

Back-probe the BCM connector ground circuits with an ohmmeter to ground. Refer to Testing for Continuity in Wiring Systems.

Is the value as specified?

Less than 1 ohms

Go to Step 19

Go to Step 23

Repair the ground side of the rear compartment lid release switch. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

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Go to Step 25

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Repair the circuit between the rear compartment lid release switch and the BCM. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

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Go to Step 25

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Replace the compartment lid release switch. Refer to Rear Compartment Lid Switch Replacement .

Did you complete the repair?

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Go to Step 25

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Inputs correct. Replace the BCM.

Did you complete the repair?

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Go to Step 25

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Repair the circuit between the rear compartment lid actuator assembly and the BCM. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

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Go to Step 25

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Replace rear compartment lock actuator. Refer to Rear Compartment Lid Lock Actuator Replacement .

Did you complete the repair?

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Go to Step 25

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Repair the battery positive feed circuit to the LOCK PWR input of the BCM. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

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Go to Step 25

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Repair ground circuits. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

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Go to Step 25

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Repair the ground circuit of the rear compartment lid release actuator assembly. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

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Go to Step 25

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Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 2