Security System Modifications

1995 System Changes Are As Follows:
- Starter motor inhibit if the doors, hood or tailgate are open after the system has been armed, the alarm will sound and the electrical circuit between the starter motor and ignition key will be disabled (starter relay).
- Interior light feature will illuminate for 15 seconds or until the ignition switch is turned, whenever the alarm system is deactivated using the remote handset.

1996 Discovery Security System Changes Are As Follows:
- New ECU - same location.
- Antenna wire not coax cable - new location, not in "A" pillar, now in front of instrument cluster.
- Different remote handset - 2 button (lock/unlock) instead of one.
- Rolling code for security between ECU and remote handset.

NOTE: Code can be lost if battery discharges or is disconnected in vehicle or remote handset or remote pushed too many times beyond remote range.

- Handset must be re-synchronized:
The vehicle must be unlocked before resynchronizing handset. To resynchronize remote handset, push remote button 4 times within range of security system.

- Crank inhibit and GEMS Immobilization (had crank inhibit-1995 system) communication code between GEMS-ECU and SECURITY ECU. If either ECU is replaced. Communication code will have to be reset using TestBook (new security cable J1962) connector.
- Remote handset learning can only be performed using TestBook.
- Can program up to 4 remote handsets (2 from parts) at the same time. Two remote handsets programmable 1994 - 1995.
- Now the remote handset low battery warning is the loss of 4-way lamp flash on disarm.

1997 Update
- Antenna wire located at alarm ECU.
- Internal ECU and antenna mod to increase remote working distance.