Passive immobilization prevents vehicle engine from being started unless the authorized key is used. When ignition is switched off, the vehicle remains mobilized for up to 5 minutes. If driver's door is opened after 2.5 minutes, the vehicle remains in a mobilized state for a 30 seconds further. When the timer in the BCU has expired, the vehicle is immobilized. When ignition is turned on, the BCU transmits a coded signal to the ECM. If the coded signal does not correspond to the programmed code in the ECM, the ECM operation is inhibited and the BCU inhibits the starting circuit. For passive immobilization to be activated, the driver's door must be closed, the inertia (fuel cut-off) switch must not be tripped, and the key is not inserted in ignition switch.
Whenever vehicle is immobilized, passive remobilizing of the engine occurs when the vehicle is started. The BCU controls the passive exciter coil (located around the ignition barrel). The passive exciter coil generates a magnetic field, which causes the remote transmitter handset to transmit a remobilizing signal. When the BCU receives a valid signal, it allows the vehicle to be started. If a valid signal from the handset is not received within one minute of the ignition switch being turned to the start position, the BCU stops the passive exciter coil from generating the magnetic field.
EMERGENCY KEY ACCESS (EKA)
NOTE:Before attempting an Emergency Key Access (EKA), ensure remote transmitter handset batteries are in good condition. If batteries are no good or replacement procedure takes more than 60 seconds, remote transmitter will require resynchronization.
NOTE:If either front door is opened while entering an EKA code, a mislock will be indicated. The door must be closed, key locked, and the code entered from the beginning. This does not count as an incorrect code entry. The EKA code will not be recognized if there is an interval of 10 seconds or more between key turns or if the key is held turned for 5 seconds or more during the procedure.
Emergency Key Access (EKA) allows anti-theft system to be disarmed and engine to be mobilized when a remote transmitter handset malfunctions. EKA requires that a 4-digit code be entered using the key and the driver's door lock. The 4-digit code is either a number assigned to the vehicle, and found on the security information card, or a default number obtainable from the manufacturer. With vehicle locked, alarm system armed, and key inserted in driver's door lock cylinder, turn key as specified (key must be fully turned to rest and lock/unlock position each time):
Insert key into driver's door lock, turn key to the unlock position and hold for at least 5 seconds. There will be an audible warning when the BCU is ready to accept the code. Return the key to the rest position. It is now possible to use the key to enter the separate numerical values of the 4 digits that make up the EKA code.
If the first digit is 4, turn the key to the unlock position 4 times. Ensure key is fully returned to rest position after each turn of the key.
If the second digit is 3, turn the key to the lock position 3 times. Ensure key is fully returned to rest position after each turn of the key.
If the third digit is 2, turn the key to the unlock position 2 times. Ensure key is fully returned to rest position after each turn of the key.
If the fourth digit is one, turn the key to the lock position one time. Ensure key is fully returned to rest position after each turn of the key.
Finally, turn the key to the unlock position and back to rest position, a double beep will indicate that the code has been entered correctly. A single beep indicates that the code has been entered incorrectly.
Before opening the door, WAIT 5 minutes for the alarm and immobilizer to be deactivated. DO NOT open the door or attempt to enter the vehicle until the full delay period has elapsed.
During the 5 minute wait for the alarm and immobilizer to be deactivated, the alarm indicator LED in the instrument pack will continue to flash (one flash every 2 seconds).
When the 5 minute wait has elapsed, the alarm indicator LED will stop flashing. Immediately open the door, insert key into the ignition switch and turn to RUN position. The ignition switch must be turned to RUN position within 30 seconds of the end of the 5 minute wait or the BCU will automatically immobilize the engine again.
If an incorrect code is entered, an audible warning is emitted and the procedure must be repeated. Up to 10 attempts to enter the correct code are possible. After 10 attempts, the BCU will not allow any further codes to be entered for a period of 10 minutes.
Thursday, April 15th, 2010 AT 2:53 AM