Matt95GT
12-02-2005, 10:43 PM
This is confirmed information from the GM shop manual. This information only applies to the factory-installed GM keyless entry system.
The remotes are made for GM by TRW. The part number on a 94 is 10205241
The keyless entry remotes use two DL2016 batteries.
http://fazeshift.org/pics/albums/userpics/10001/N30004%20Keyless%20Figure%202.jpg
VEHICLE ACCESS CODE
All RKE transmitters have a random 32-bit Vehicle Access Code (VAC) stored in a programmable read only memory (PROM). The VAC cannot be altered. The 32-bit VAC allows for over 4.3 billion different code variations. Based on the time required to transmit the VAC to the receiver module and the number of code variations, it would take over 14 years to sequentially "break" the VAC. This is sufficient time to deter unauthorized entry by a random code breaking procedure.
KEYLESS ENTRY MODULE PROGRAMMING
Figure 3
http://fazeshift.org/pics/albums/userpics/10001/N30001%20Keyless%20Figure%203.jpg
All Keyless Entry Modules (receivers) may be programmed to receive two vehicle access codes (VAC). That is, two different transmitters may be used to operate the remote control lock system on the vehicle. Also, several vehicles, each with the Remote Lock Control may all be programmed to operate from the same transmitter or two different transmitters. During the programming of the Keyless Entry Module, feedback is provided by the receiver by cycling the door locks. To program a Keyless Entry Module (receiver) to match the VAC of one or two transmitters:
1. Jumper the Keyless Entry Module's "program" connector with a jumper between the two cavities. The program connector is located forward of the left rear inner wheel panel, inside the luggage compartment. The program connector contains two cavities, A & B. The TAN wire in cavity "A" is the programming lead, and the BLACK wire in cavity "B" is a ground. Jumping cavity A to B will initiate the program mode. The module will cycle the door locks as an indication of program mode feedback.
2. Press one button on the transmitter one time to store that transmitter's VAC. The door locks will cycle as feedback.
3. (Go to Step 4 if only one transmitter will be used.) Press one button on the second transmitter to store the second transmitter's VAC. (The first transmitter's VAC is retained.) The door locks will cycle as feedback. If a second VAC signal is not received before the programming harness is removed, the receiver will be programmed to the first transmitter's VAC only. This procedure deters unauthorized programming without owner knowledge.
4. Remove programming (jumper) harness to restore normal system operation.
5. Verify proper operation of RKE system. Do not leave the door lock key (oval head) in the vehicle while programming the Keyless Entry Module. This will avoid unintentional lock out if the programming procedure is not properly performed.
All vehicles with the Remote Keyless Entry option will have the Keyless Entry Module "matched" to the transmitter at the assembly plant. The above procedure is used by service to replace lost transmitters or to program the VAC of a second transmitter. Prior VAC's are erased from the Keyless Entry Module's (receiver) memory when the programming harness is connected. Up to two vehicle access codes may be stored in the Keyless Entry Module's memory. The memory is an electronically erasable programmable read only memory (EEPROM) which is nonvolatile. Therefore, if power to the module is interrupted (battery or fuse disconnect) the VAC's are not erased.
The remotes are made for GM by TRW. The part number on a 94 is 10205241
The keyless entry remotes use two DL2016 batteries.
http://fazeshift.org/pics/albums/userpics/10001/N30004%20Keyless%20Figure%202.jpg
VEHICLE ACCESS CODE
All RKE transmitters have a random 32-bit Vehicle Access Code (VAC) stored in a programmable read only memory (PROM). The VAC cannot be altered. The 32-bit VAC allows for over 4.3 billion different code variations. Based on the time required to transmit the VAC to the receiver module and the number of code variations, it would take over 14 years to sequentially "break" the VAC. This is sufficient time to deter unauthorized entry by a random code breaking procedure.
KEYLESS ENTRY MODULE PROGRAMMING
Figure 3
http://fazeshift.org/pics/albums/userpics/10001/N30001%20Keyless%20Figure%203.jpg
All Keyless Entry Modules (receivers) may be programmed to receive two vehicle access codes (VAC). That is, two different transmitters may be used to operate the remote control lock system on the vehicle. Also, several vehicles, each with the Remote Lock Control may all be programmed to operate from the same transmitter or two different transmitters. During the programming of the Keyless Entry Module, feedback is provided by the receiver by cycling the door locks. To program a Keyless Entry Module (receiver) to match the VAC of one or two transmitters:
1. Jumper the Keyless Entry Module's "program" connector with a jumper between the two cavities. The program connector is located forward of the left rear inner wheel panel, inside the luggage compartment. The program connector contains two cavities, A & B. The TAN wire in cavity "A" is the programming lead, and the BLACK wire in cavity "B" is a ground. Jumping cavity A to B will initiate the program mode. The module will cycle the door locks as an indication of program mode feedback.
2. Press one button on the transmitter one time to store that transmitter's VAC. The door locks will cycle as feedback.
3. (Go to Step 4 if only one transmitter will be used.) Press one button on the second transmitter to store the second transmitter's VAC. (The first transmitter's VAC is retained.) The door locks will cycle as feedback. If a second VAC signal is not received before the programming harness is removed, the receiver will be programmed to the first transmitter's VAC only. This procedure deters unauthorized programming without owner knowledge.
4. Remove programming (jumper) harness to restore normal system operation.
5. Verify proper operation of RKE system. Do not leave the door lock key (oval head) in the vehicle while programming the Keyless Entry Module. This will avoid unintentional lock out if the programming procedure is not properly performed.
All vehicles with the Remote Keyless Entry option will have the Keyless Entry Module "matched" to the transmitter at the assembly plant. The above procedure is used by service to replace lost transmitters or to program the VAC of a second transmitter. Prior VAC's are erased from the Keyless Entry Module's (receiver) memory when the programming harness is connected. Up to two vehicle access codes may be stored in the Keyless Entry Module's memory. The memory is an electronically erasable programmable read only memory (EEPROM) which is nonvolatile. Therefore, if power to the module is interrupted (battery or fuse disconnect) the VAC's are not erased.