Circuit Description
The body control module (BCM) runs a test in order to determine whether the rear compartment lid tamper switch is active. This test is run every 1.0 second while the BCM is awake.
Conditions for Running the DTC
The body control module (BCM) is awake. The BCM cannot have DTC B1982 or B1983 set as a current code. The theft deterrent system is in one of the following states:
| • | OFF |
| • | Idle |
| • | Ready to arm |
| • | Arm initiated |
| • | Arm delay |
Conditions for Setting the DTC
The BCM determines that the rear compartment lid tamper switch has been active for 2 seconds.
Action Taken When the DTC Sets
| • | The body control module (BCM) sets DTC B2719 as current, but the BCM still allows the arming of the theft deterrent system, disregarding the input of the rear compartment lid tamper switch. |
| • | The security indicator does not illuminate. |
Conditions for Clearing the MIL/DTC
| • | The BCM determines that the rear compartment lid switch is no longer active and that the ignition switch has been cycled from OFF to ON. |
| • | A history DTC will clear after 50 consecutive ignition cycles if the condition for the malfunction is no longer present. |
| • | Use a scan tool. |
Diagnostic Aids
The following conditions may activate the system intermittently. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
| • | A corroded rear compartment lid tamper switch connector. |
| • | The retainer is not firmly installed to the cylinder. |
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
Verifies the fault is present.
-
Test for a faulty rear compartment lid tamper switch.
-
Tests the rear compartment lid tamper switch signal circuit for a short to ground.
-
Verifies the rear compartment lid tamper switch retainer is properly seated.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Theft Deterrent System Schematics | |||
1 | Did you perform the Theft Deterrent Diagnostic System Check? | Go to Step 2 | |
Does the scan tool display OFF? | Go to Diagnostic Aids | Go to Step 3 | |
Does the scan tool display OFF? | Go to Step 5 | Go to Step 4 | |
Test the signal circuit of the rear compartment lid tamper switch for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 9 | Go to Step 6 | |
Did you find and correct the condition? | Go to Step 9 | Go to Step 7 | |
6 | Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 9 | Go to Step 8 |
7 | Replace the rear compartment lid tamper switch. Refer to Rear Compartment Lid Lock Cylinder Replacement in Body Rear End. Did you complete the replacement? | Go to Step 9 | -- |
8 | Replace the body control module (BCM) . Refer to Body Control Module Replacement in Body Control Systems. Did you complete the replacement? | Go to Step 9 | -- |
9 |
Does the DTC reset? | Go to Step 2 | System OK |
