Circuit Description
The body control module (BCM) will read an analog voltage from the Passlock™ sensor. Based on the Passlock™ internal reference, the BCM will determine if the indicated voltage is 1 of the following conditions:
| • | Open |
| • | Shorted to ground |
| • | A valid code |
| • | A tamper code |
In the case of a tamper code the BCM is reading a tamper code.
Conditions for Setting the DTC
| • | The BCM will inspect for a tamper code when the ignition switch rotates from ON to CRANK. |
| • | The BCM is reading a tamper code from the Passlock™ sensor for longer than 1.0 seconds. |
Action Taken When the DTC Sets
| • | The vehicle will not run. The security indicator will be flashing. |
| • | The Passlock™ state is Tamper. |
Conditions for Clearing the DTC
| • | The DTC will clear once an ignition cycle occurs without the fault recurring. |
| • | The BCM history codes will clear after 100 ignition cycles occur without the fault recurring. |
| • | Use a scan tool. |
Diagnostic Aids
| • | Prior to replacing a BCM, ensure that all of the diagnostics have been completed. Refer to Body Control Module Replacement in Body Control Systems. |
| • | Perform a visual inspection of the wiring and the connectors. |
| • | The VTD internal diagnostics are not run while the tamper timer is active. |
Test Description
The numbers below refer to the step numbers on the diagnostic table:
Step | Action | Value(s) | Yes | No | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | Did you perform the Theft Deterrent (VTD) Diagnostic System Check? | -- | Go to Step 2 | |||||||||||||||||||||
2 |
Important: Do not start the vehicle. Does the scan tool display DTC B3033 as a current DTC? | -- | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections | ||||||||||||||||||||
Inspect the area around the ignition lock cylinder for any device which could create a magnetic field (audio speaker, magnet, etc.). Is there a magnetic device near the ignition lock cylinder? | -- | Go to Step 4 | Go to Step 5 | |||||||||||||||||||||
4 | Remove the device creating the magnetic force. Did you complete the repair? | -- | Go to Step 8 | -- | ||||||||||||||||||||
5 | Inspect for poor connections at the Passlock ™ sensor. 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 8 | Go to Step 6 | ||||||||||||||||||||
6 | Replace the Passlock™ sensor in the electronic column lock module assembly. Use the appropriate procedure from the following list:
Did you complete the replacement? | -- | Go to Step 7 | -- | ||||||||||||||||||||
7 | Perform one of the following Passlock™ learn procedures:
Is the repair complete? | -- | Go to Step 8 | -- | ||||||||||||||||||||
8 | You may have to wait up to 10 minutes in order to reset the BCM and synchronize all of the Passlock™ components.
Does the DTC reset? | -- | Go to Step 3 | System OK |
