GM Service Manual Online
For 1990-2009 cars only

Security Data

Auto Learn Timer: The scan tool displays the seconds used by the Passlock™ module to learn valid code from the Passlock™ sensor. The learn procedure consists of 3 consecutive periods.

Battery Voltage: The scan tool displays the battery system voltage.

Ignition 1: The scan tool displays the state of the ignition switch. The scan tool displays ACTIVE when the ignition switch is in the RUN or CRANK position.

Ignition 3: The scan tool displays the state of the ignition switch. The scan tool displays ACTIVE when the ignition switch is in the RUN position.

Passlock™ Code: The scan tool displays the validity of the Passlock™ code received by the Passlock™ module. The scan tool displays OPEN, SHORTED, TAMPER and a valid code as a numeric value (1-10).

Passlock™ Data Voltage: The scan tool displays the voltage code from the Passlock™ sensor to the Passlock™ module. The Passlock™ module determines if the voltage received is a valid or invalid code voltage.

Passlock™ Power: The scan tool displays the 12v reference voltage at the Passlock™ module. The Passlock™ module determines if the monitored voltage is valid or invalid.

Passlock™ State: The scan tool displays the state of the Passlock™ system.

Security Lamp Feedback: The scan tool displays the feedback voltage at the Passlock™ module. The Passlock™ module determines if the monitored voltage is valid or invalid.

Security Lamp State: The scan tool displays the state of the SECURITY lamp. The scan tool displays ON, OFF or FLASHING.

Tamper Timer: The scan tool displays the time remaining when in the tamper mode. The timer starts when the ignition switch is turned to the RUN position and the Passlock™ module receives a Passlock™ data voltage different from the last learned voltage. The timer has a delay of 10 minutes and will stay active even if the ignition switch is cycled from the RUN to the OFF position.