Memory opening
- Make
- Alfa Romeo
- Model
- 145/146 Electrical System Diagnosis Manual, Volume 3
- Year
- 1994–2001
- Section
- Anti Theft device › Memory opening
- Proceed as described above for all the other figures.
NOTE: When the password (see example) contains a "0" there is no need to press button D, simply wait for the request for confirmation of entry indicated by the next flash.
When the four figures of the Password have been entered, the LED on the receiver C can behave as follows:
- it does not light up: this means that the Password has been entered correctly and that it belongs to one of the codes of the remote controls memorised;
- it stays on continuously for several seconds meaning that the password has not been entered correctly or it does not correspond to any of the remote controls memorised. In this case, when LED C goes off, the correct Password should be entered beginning from point 1.
With the correct entry of the password the memory is "locked".
From now onwards, if attempts are made to memorise a new remote control, after transmitting the new code, LED C on the ceiling light will stop flashing to indicate that the operation is unsuccessful.
In this case, to enter the code of the new remote control the memory has to be "re-opened" by the following procedure.
Memory opening
When the memory has been "locked" further remote control codes are entered by "manual memory opening".
The memory is opened as follows:
- press the button on receiver D for appr. 2 seconds; LED C will flash for the whole time in which the button is pressed;
- Release button D: after appr. 2 seconds LED C will flash once indicating the possibility to enter the first digit of the password.
- Press the button of the receiver D the number of times corresponding to the first figure of the password (for example if the Password is 5.2.0.3, press 5 times). Each time button D is pressed LED C lights up briefly to confirm;
- After appr. 2 seconds from the last press on button D (the fifth in the example) led will flash again to ask for the next figure.
- Proceed as described above for all the other figures. It should be noted that when the password (see example) contains a "0" there is no need to press the button, simply wait for the next request.
When the Password have been entered, the LED C can behave as follows:
- it stays on continuously meaning that the password has not been entered correctly or it is not present in the memory. Repeat the memory opening operations (with the correct password) from point 1;
- it starts flashing: this means that the password has been entered correctly (memory opening) and that it belongs to one of the remote control codes memorised.
At this point to memorise the code of the new transmitter proceed as described at point 1 of "Simplified programming".
When the new remote control has been entered the memory returns to the "locked" mode.
N.B.: The alarm system is activated/de-activated only by the code of the last transmitter memorised correctly (with the key at "ON").
In fact this code is memorised contemporaneously by both the receiver and the alarm control unit.
Any transmitters memorised previously in the receiver, though they have different codes, utilise the code of the last transmitter memorised to control the theft alarm. If previously the receiver and alarm system were regularly controlled by a transmitter and subsequently another transmitter is memorised with the alarm system key at "OFF", the code of this subsequent transmitter is memorised by the receiver, which regularly operates central door locking, while the code of the first transmitter remains in the control unit. Under these conditions, the alarm system can no longer be controlled by the transmitter, which can only operate door opening/closing.
Simply setting the alarm system key to "ON" and memorising another new transmitter, the problem remains unsolved, as the system can duly memorise a new code only if this has been memorised with the alarm system key at "ON" and in succession after the first transmitter. It is necessary to "open the memory" (as described previously) with the first transmitter, and then correctly enter the other transmitters.
WARNING: It should be noted that each single component of the anti-theft system installed on the car becomes an integral part of it and must not be altered or tested on other cars, even if of the same model.
Therefore, never exchange control units and/or receivers between two vehicles. If a control unit is replaced, the memorising procedure must be repeated "re-opening" the memory. If a receiver (ceiling lamp) is changed, simplified programming must be carried out followed by protected programming.
Parts & tools for this job For 1994 Alfa Romeo 145/146
- TOOLDigital multimeterSearch: automotive digital multimeter
- PARTAssorted fuse kitSearch: car fuse assortment kit
- TOOLWire crimper and connector kitSearch: wire crimper connector kit
Links open Amazon search results in a new tab. As an Amazon Associate I earn from qualifying purchases.