The anti theft will disable the injectors and the starter, here is a description of the system
PERSONAL AUTOMOTIVE SECURITY SYSTEM (PASS-Key II) OPERATION
PASS-Key II is a registered trademark of Delco Electronics Corporation.
When a key is inserted in the ignition, contacts located in the ignition cylinder contact a resistor pellet located in the key. The Instrument Panel Cluster (IPC) measures the resistance of the key pellet and then compares this value to a value stored in the IPC's memory. The IPC, then performs one of the following functions:
|-> ||If the values match, the IPC performs the following (system enable) functions:|
- Provides a ground for the Starter Enable Relay, enabling the starter to operate.
- Sends a Class 2 message to the Powertrain Control Module (PCM), the PCM then enables the fuel system to operate.
|-> ||If the values do not match, the IPC performs the following (system disable) functions for approximately three minutes:|
- No ground provided to the Starter Enable Relay, disabling the starter.
- No system enable Class 2 message is sent to the PCM, the PCM does not enable the fuel system for approximately three minutes.
If the ignition switch is turned to the RUN position anytime during the system disable interval, the IPC disregards XXXXX XXXXX pellet value until the three minute system disable interval is complete (even if the correct key pellet value was used).
After approximately three minutes, the IPC measures the key pellet resistance and compares it to the one stored in the IPC's memory. If the values match, the IPC performs the system enable function (see above). If the values do not match, the IPC performs the system disable functions again (see above).
If the IPC is unable to measure the key pellet resistance (due to a damaged or missing pellet), the IPC does not perform system disable functions (a readable key with the correct resistance value can be used to start the vehicle).
For additional message information and diagnostics, refer to Instrument Panel Cluster Diagnosis
STARTING DISABLED DUE TO THEFT SYSTEM REMOVE IGNITION KEY
If the PCM does not receive the fuel enable message, the PCM sends a message to the IPC to display the "STARTING DISABLED DUE TO THEFT SYSTEM REMOVE IGNITION KEY" message on the Driver Information Center, via the Class 2 serial data line. This informs the driver why the engine is not starting and starts a three minute interval, with messages, before attempting a vehicle restart.
WAIT 3 MINUTES, WAIT 2 MINUTES, WAIT 1 MINUTE, and START CAR
When the ignition switch is returned to the OFF position, the IPC starts a timer and at one minute intervals displays the following messages: "WAIT 3 MINUTES", "WAIT 2 MINUTES", "WAIT 1 MINUTES", and "START CAR". These messages inform the driver to wait for the PASS-Key II system to reset, before attempting to restart the vehicle.
Following the "WAIT 3 MINUTES", "WAIT 2 MINUTES", "WAIT 1 MINUTE", and "START CAR" messages, alternating every three seconds, the IPC displays the REMOVE KEY message. This informs the driver that the key should be removed, before attempting to restart the vehicle.
THEFT SYSTEM PROBLEM CAR MAY NOT RESTART
The "THEFT SYSTEM PROBLEM CAR MAY NOT RESTART" message is displayed, when the engine is running and the IPC has detected a PASS-Key II system malfunction. The vehicle continues to run, but if the error is present when the vehicle is turned off, the vehicle may not restart.
SECURITY INDICATOR OPERATION
When the ignition switch is turned to the "ON" position, the security indicator illuminates for approximately five seconds, indicating to the driver that the system is operating correctly.
The four bulb control modes for the PASS-Key II system are listed below.
Bulb Stays Illuminated and Engine Starts
If the security indicator stays illuminated after the engine starts, this is an indication that one of the following conditions has occurred:
|-> ||The IPC is not properly programmed, more than one key code value can be used to start the vehicle. The improperly programmed IPC condition usually occurs on a vehicle where the IPC has been recently replaced. Refer to Programming the Instrument Panel Cluster in Instrument Panel Cluster Diagnosis|
|-> ||The IPC detected a malfunction in the PASS-Key II system while the engine was last running. Verify that the IPC connections are secure and that a good ignition key is being used. For further diagnosis, refer to Instrument Panel Cluster Diagnostic System Check in Instrument Panel Cluster Diagnosis.|
Bulb Stays Illuminated and Engine Does Not Start
If the security indicator stays illuminated while attempting to start the engine and the engine does not start, the IPC has detected an incorrect key pellet resistance (key code) value and activated the system disable functions. The following actions should be taken:
- Remove the key from the ignition
- Verify that the correct key code (key pellet) is being used to start the vehicle. Using J 35628-A, measure each key pellet for the vehicle, all the key codes should match.
- Wait approximately 3 minutes for the system disable timer to expire, attempt to restart the engine using a known good key with the correct key code.
- If the engine still won't start, refer to Theft Deterrent System Check Cell 133 in Electrical Diagnosis.
Bulb Flashes and Engine Does Not Start
If the security indicator flashes and the engine does not start; the IPC has detected an open or short in the ignition key resistor input circuit. During this mode of operation the IPC will not start the system disable timer.