Password Learn Procedure Using a Tech 2 Scan Tool (Seed and Key)
Important: In addition to the time involved in performing the specific steps, the Seed
and Key Procedure accomplishes the same task in 10 minutes as the Auto Learn
Procedure does in 30 minutes. Use either one of these two procedures.
The following is the Seed and Key Learn Procedure:
- Clear all Vehicle Theft Deterrent (VTD), or (Passlock), module and VCM
DTCs.
- Turn the ignition ON.
- With scan tool (TECH 2) connected to the vehicle, select "Programming/Request
Info" from the menu, then follow the instructions.
- Disconnect the scan tool from the vehicle and perform "Service
Programming System/VTD Learn" with Techline terminal, then follow the instructions.
- Reconnect the scan tool to the vehicle.
- Follow the instructions on the scan tool to perform the VTD (Passlock)
password learn on the vehicle, this takes about 10 minutes.
- After 10 minutes, the SECURITY indicator will turn OFF and the module
will learn the new component on the next ignition lock cylinder cycle from OFF-to-CRANK-to-ON
(start attempt).
Password Learn Procedure without Tech 2 Scan Tool
Important: While the VCM is in the Auto Learn Procedure, maintain the battery voltage
at all times. Follow the procedure exactly as indicated or the procedure will have
to be repeated from the beginning.
- Clear all VTD (Passlock) module and VCM DTCs.
- Turn the ignition OFF.
- Replace the module or the sensor if necessary.
- Turn the ignition ON.
- Momentarily rotate the ignition switch to the CRANK position. Do not
start the vehicle.
- Turn the ignition ON.
- Wait 10 minutes. Observe the SECURITY indicator. Refer to the following
list for the appropriate responses:
• | If the Passlock sensor was replaced, the SECURITY indicator will flash
for the 10 minute duration. |
• | If the VTD (Passlock) module was replaced, the SECURITY indicator will
flash for a few seconds and then remain ON for the remainder of the 10 minute
duration. |
• | If the VCM was replaced with a new VCM off the shelf, the vehicle will
start and this procedure may not be necessary. |
• | If the replacement VCM was plugged at any other time, even momentarily,
the SECURITY indicator will flash for a few seconds and then remain ON for the
10 minute duration. |
- The SECURITY indicator will make a transition from flashing to ON briefly,
then to OFF after 10 minutes if remaining in the ignition ON position.
- Turn the ignition OFF and wait for 10 seconds.
- Repeat steps 3-8 two more times. The module will learn the new
component on the next ignition lock cylinder cycle from OFF-to-CRANK-to-ON (start
attempt).