Circuit Description
This DTC is set when the body control module (BCM) is in the learn mode. The scan tool shows the Passlock™ data voltage under the following conditions:
| • | The BCM is in the learn mode. |
| • | The ignition switch is cycled. |
Conditions for Setting the DTC
All of the following conditions must be met:
| • | Ignition 0 is inactive. |
| • | The Passlock™ key code has not been learned. |
Action Taken When the DTC Sets
| • | The BCM stores the DTC B3031 in the BCM memory. |
| • | The vehicle will not start. |
| • | Security indicator illuminates. |
Conditions for Clearing the DTC
| • | The BCM goes to sleep and reinitializes with the fault cleared. |
| • | All of the BCM history codes will be cleared after 100 ignition cycles (from OFF to ON) with no current codes active during the 100 ignition cycles. |
| • | Use a scan tool. |
| • | The BCM learns the correct key code. |
Diagnostic Aids
If the DTC is a history DTC, the problem may be intermittent. Perform the tests shown while wiggling the wiring and connectors. This will cause the malfunction to appear.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
|
Important: A short to ground will cause an open fuse(s). Before performing this diagnostic procedure, inspect the fuse(s) for an open. | ||||
1 | Was the Theft Deterrent System diagnostic system check performed? | -- | Go to Step 2 | |
2 | Place the Body Control Module (BCM) in auto learn. Is the BCM placed in auto learn? | -- | Go to Step 3 | -- |
3 | Read the DTCs using the Scan Tool . Have any of the DTCs reset? | -- | Go to Step 4 | Go to Step 6 |
4 | Refer to the proper DTC in the Symptom Table. Is the repair complete? | -- | Go to Step 6 | Go to Step 5 |
5 | Replace the BCM. Refer to Body Control Module Replacement in Body Control Systems. Is the repair complete? | -- | Go to Step 6 | -- |
6 | Clear the DTCs from the memory. Are the DTCs cleared from the memory? | -- | -- | |
