Circuit Description
In this mode, the Passlock module will learn the current Passlock sensor code value. The following list is the 2 Passlock learn procedures:
| • | A 10 minute procedure that requires a Techline terminal. |
| • | A 30 minute learn procedure that requires a scan tool in order to clear the codes. |
Conditions for Setting the DTC
| • | A new (never installed in a vehicle) Passlock module has been installed and the ignition is turned to ON but is not rotated to crank. Once the ignition switch has been rotated to crank, the Passlock module will learn the Passlock code. |
| • | The Passlock module is in the learn mode but does not see a valid Passlock sensor code because of a sensor or a wiring problem. |
Actions Taken When the DTC Sets
The vehicle will not run and the security telltale will be ON.
Conditions for Clearing the DTC
| • | The DTC will clear after an ignition cycle has occurred after the Passlock module has learned a valid code. |
| • | Passlock module history codes will be cleared after 100 ignition cycles with no current codes active. |
| • | Using a scan tool. |
Diagnostic Aids
| • | Prior to replacing a Passlock module insure all the diagnostics have been completed. If the Passlock module has been replaced with an existing system condition, the replacement Passlock module will not learn a new voltage code (DTC B3031) until the original condition has been repaired. |
| • | Perform a visual inspection of the wiring and the connectors. |
| • | Inspect the Passlock sensor harness for an intermittent or poor connections (including the in-line connector). Refer to Intermittents and Poor Connections . |
Test Description
The numbers below refer to the numbers on the diagnostic table:
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The Passlock module learns an analog voltage code when the ignition switch is turned to the crank position. If a Passlock module is replaced and the ignition is turned to the ON position, DTC B3031 will set until the module sees a crank switch position or until the Passlock sensor has latched.
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Turning the ignition switch to crank will reset DTC B3031 in a new module.
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If a conditions in 1 of the following circuits, troubleshoot the appropriate DTC prior to diagnosing DTC B3031:
| • | CKT 812 |
| • | CKT 1836 |
| • | CKT 1057 |
Step | Action | Value(s) | Yes | No | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | Did you perform the VTD Diagnostic System Check? | -- | Go to Step 2 | |||||||||||||
Has the Passlock module recently been replaced? | -- | Go to Step 3 | Go to Step 4 | |||||||||||||
Turn the ignition switch to crank and the back to the ON position. In the crank position the Passlock module will receive an analog voltage code from the sensor. Is the operation complete? | -- | -- | ||||||||||||||
Is 1 or more of the DTCs set? | -- | Go to Step 5 | ||||||||||||||
5 | Replace the Passlock sensor in the electronic column lock module assembly. Use the appropriate procedure from the following list:
Is the repair complete? | -- | Go to Step 7 | Go to Step 6 | ||||||||||||
6 | Replace the Passlock module. Refer to Theft Deterrent Module Replacement . Is the repair complete? | -- | Go to Step 7 | -- | ||||||||||||
7 |
Is the repair complete? | -- | -- |
