Circuit Description
The body control module (BCM) contains the content theft deterrent (CTD) system logic. In order for the CTD system to function properly, the BCM must sense the presence of the security indicator LED as an input. During every ignition cycle, the BCM attempts to sense to presence of the LED indicator. If this DTC is NOT set, the CTD system will not function.
Conditions for Setting the DTC
DTC 25 is set as a current DTC when the BCM detects the security LED when the ignition is turned to the ON position.
DTC 35 is set as a history DTC when the BCM detects the security LED at any time since the codes were last cleared.
Action Taken When the DTC Sets
DTC 35 is required for content theft deterrent system operation. The security LED must be detected for the CTD system to function.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Theft Deterrent System Schematics | |||
1 | Did you perform A Diagnostic System Check-Theft Systems? | Go to Step 2 | |
2 |
Does the test lamp light? | Go to Step 3 | Go to Step 4 |
Using a DMM set to the diode scale, connect the red test lead to the security indicator LED control circuit and the black test lead to the security indicator LED ground circuit. Does the security indicator LED illuminate? | Go to Step 5 | Go to Step 8 | |
4 | Repair an open circuit in the security indicator LED ground circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 9 | -- |
5 | Test for an open or short in the security indicator LED control circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct a condition? | Go to Step 9 | Go to Step 6 |
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 a condition? | Go to Step 9 | Go to Step 7 |
7 |
Important: When replacing the BCM, perform the relearn procedure. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System. Replace the BCM. Refer to Body Control Module Replacement in Body Control System. Did you complete the repair? | Go to Step 9 | -- |
8 | Replace the security indicator LED. Refer to LED Indicator Replacement - Vehicle Security System . Did you complete the repair? | Go to Step 9 | -- |
9 | Operate the system in order to verify the repair. Does the system operate properly? | System OK | Go to Step 2 |
