Volvo s40 alarm indicator light not flashing

My V70 has an interesting issue years ago, no sunshine roof or door lock control.
That was the alarm, fitted alongside the offside front wheel arch. It has a flat battery.
Replaced the battery and that cured the issues.

Well when you replaced the battery did anything else on the key fob work? Often times you have to reprogram the remote in order for it to function properly. Try getting inside the vehicle and manually lock all doors with the driver's side switch. Put the master key in the ignition switch and turn the switch to the run position but do not start it. Now push and hold the lock and unlock buttons at the same time until the locks make noise....may take 10 to 30 seconds. After you have the key fob programmed, see if the alarm will turn off with the remote. Did it work? The only way to totally turn off the alarm is with a GM Tech @ or 3 scan tool and go into body control bidirectional controlling procedures or with a very good aftermarket scanner with good bi-directional functionality.
The alarm works via the body control module on this vehicle and i am thinking it uses the PK2 system and if you do not have a properly coded key or the BCM is loosing memory, then check for any and every blown fuse and replace as needed.to start with.. If the vehicle stays running after starting then the bcm/key is reading correctly.

ck for a fuse in the under the hood fuse box that says bsm may be blown.
Also try this.....
To reset the security system remove the negative battery cable for 30 minutes, then reconnect the cable. Next, lock and unlock the doors using the remote. This will reset the alarm system and the engine will start and fobs reset.

Here are some factory notes....FYI

Anti-Theft Systems

PROGRAMMING

NOTE: If a new Smart Entrance Control Module (SECU) is installed, a new identity code must be entered and all remote controllers must be programmed. If identity code cannot be entered, repair multi-remote system. See appropriate MULTI-REMOTE CONTROL SYSTEMS article.

PROGRAMMING > PROGRAMING NEW ID CODE

NOTE: This procedure will erase all previous identity codes and render all previously programmed remote controllers inoperative (until reprogrammed). All remote controllers to be used with system must be programmed at the same time. A maximum of 4 remote controllers can be programmed. Any attempt to program more than 4 controllers will be ignored. If same identity code is entered more than once, entry is ignored even though hazard warning lights will still flash twice.
1. Close and lock all doors. Erase original identity code(s) by inserting and completely removing key from ignition switch more than 6 times within 10 seconds. Hazard warning lights should flash twice. Turn ignition switch to ACC position.
2. Push any button on new remote controller once. Hazard warning lights should flash twice, indicating identity code has been entered. If identity code cannot be entered, repair multi-remote system. See appropriate MULTI-REMOTE CONTROL SYSTEMS article.
3. For each additional remote controller to be programmed, manually release door lock and lock again by using door panel switch and repeat step 2. If no additional remote controllers are to be used, exit programming mode by unlocking and opening driver's door.

Please let me know if you need anything else to get the problem fixed. Happy mew Year!

Inside the key fob are contacts that get dirty, both the electric side and the push button side, carefully clean them both.

I had the same problem when my battery went flat and tried to use jumper cables connected to another vehicles battery. I called Volvo and they said I need to disconnect the battery terminal to reset the computer. After re-conecting it the remote control worked again and I was able to jump start the car. Maybe your car's computer went into a similar state.

System operation
Pressing remote control lock button locks vehicle and activates system Fig. 1 . Indicators flash once. Pressing remote control unlock button unlocks vehicle and deactivates system Fig. 1 . Indicators flash twice.
Fig. 1
Synchronization
When
System malfunction. Remote control added or replaced.
How
Access alarm system control module located under driver's side lower fascia Fig. 2 . Set memory switch to SET position. Press remote control lock or unlock button. Set memory switch to OFF position. Confirm synchronization has been successful by locking and unlocking vehicle. Repeat procedure for second remote control. Synchronization can also be carried out using diagnostic equipment.
NOTE: A maximum of 2 remote controls can be programmed. NOTE: If remote control fails, system can be deactivated as detailed in the owner's handbook.

should not be using fob buttons for entry or locking for emergency only .if keyless entry walk up to car with fob do not press any buttons see if door opens then walk away from car with fob about 20m then go back to car without fob and see if door locked if so all working fine .indicators will not flash if the above dont work take back to main dealer for diagnostics keys may need to be reprogrammed

try using key in driver door locking it then unlock it see if that works

programing a Nissan remote , is hidden secret by Nissan Dealers. As a Nissan Technician i will share it.

Just get in your vech , close all doors. Using your power lock switch , lock all doors. After doors are locked take your Ignition Key and insert it and remove it from ignition switch in a slow fashion , but consitant pace. (97 and earlyer are fast) When you see the hazzard lights flash, put key in ignition switch and turn to the On postion .. Do NOT CRANK or you will have to Start over .. After in the On postion .. Hit the Lock button on remote... Hazzard lights should flash..( note..you have to reprogram all remotes when adding a new one , if you don't your old remotes will not work ) If your doing just the one , turn igntion switch off and unlock door and get out and try it. If you are doing more than one. While still in Vech with Key on . After you hit the Lock button on Remote and hazzard light flashed .. with key still on .. use master lock switch unlock doors and relock and then hit Second Remote, Lights should flash again , repeat if adding a 3rd remote.. after done just turn key off and unlock door and get out and try.

this info would cost you £30.+ at ford Radio Frequency Programming Instructions:

• Insert the ignition key and turn from position II (Ignition) to position 0 (All off) and back four times within three seconds.
• Remove the ignition key. The locking control system is now in "learn mode" for the next 20 seconds and the red warning system LED (By the clock) stays on continuously to indicate this.
• During the 20 seconds press one of the transmitter buttons. The remotes signal and code number is learned by the locking module and is indicated by flashing the warning system LED.
• Wait until learn mode times out (20 seconds) or switch the ignition back to ON.nfrared Programming Instructions:
• Put your key into the ignition and turn to position 1 (Radio). After approximately 10 seconds the red alarm control LED (next to the clock) should illuminate. As soon as it comes on remove the key from the ignition - the LED should remain lit.
• Point the remote's "eye" at one of the front door sensors and press the rear button until the light on the transmitter illuminates (Keep the button pressed)
• With the rear button held in press the front button 4 times then release both at the same time. The control lights in both clock and fob will flash 4 times to indicate programming complete.
• Turn the ignition back on to exit programming mode