B3033

Diagnostic Chart:

Schematic:

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 one of the following conditions:
^ Open
^ Shorted to ground
^ A valid code A tamper code

In the case of a tamper condition, the BCM will be reading a tamper code.

CONDITIONS FOR RUNNING THE DTC
The ignition switch is cycled to CRANK and released to ON.

CONDITIONS FOR SETTING THE DTC
^ The BCM will inspect for a tamper code when the ignition switch rotates from ON to CRANK and will continue to monitor the signal during the engine running period.
^ The BCM is reading a tamper code from the Passlock sensor for longer than 1 second.

ACTION TAKEN WHEN THE DTC SETS
^ The BCM enters tamper mode and will not allow the vehicle to start.
^ If the DTC sets while the engine is running. the car will start on future attempts and the theft indicator flashes.
^ The SERVICE VEHICLE SOON indicator illuminates.

CONDITIONS FOR CLEARING THE DTC
^ The BCM is programmed and learns the correct ignition cylinder key code.
^ Current DTCs will clear after one ignition cycle if the malfunction is no longer present.
^ 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.

DIAGNOSTIC AIDS
^ Inspect for a damaged Passlock sensor in the ignition switch.
^ 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.

TEST DESCRIPTION
The numbers below refer to the step numbers on the diagnostic table:
3. Tests the magnet placement and inspects the ignition lock cylinder for a mechanical problem.