Volvo 940 turbo diesel estate won't start

check battery volts should be 12.6 volts.if not battery dead.have battery charged and test if battery can be charged alternator faulty.if battery dead cant be charged replace battery.and clean battery cables if EPC warning light still flash have vechicle code scan for faulty accelerator control system or mass air flow sensor.to get vechicle started after replacing battery just turn ignition switch to the on position for 30 seconds then turn off ignition switch then start engine.

U MUST LOCK ALL DOORS and unlock with key place key in ignition switch turn on but do not start wait three minutes or until security light goes off then start

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you have to check you engine starter (dispositive that is made to turn on your car)

Volvo Code Retrieval Accessing Trouble Codes 89-93 models (and later non-turbo/non-OBDII models)

Fuel Codes Locate the diagnostic unit behind left strut tower and remove its cover.(see image) Connect selector cable to socket #2,which tests the fuel codes. Turn the ignition switch to the ON position(engine not running). Enter the diagnostic mode by pressing the push button on the diagnostic unit for at least 1 second, but not more than 3 seconds. The red LED light will start to flash,count the number of flashes in 3 flash intervals. The flashes will be seperated by 3 second intervals.Make note of all codes. If no codes are stored,the LED will flash 1-1-1,which means the fuel system is operating correctly.


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Ignition Codes To access the ignition codes,follow the above procedure,but with the selector cable connected to the #6 socket on the diagnostic unit.
NOTE:Turbocharged models may have seperate codes for the turbo system and are accessse by hooking the selector cable to the #5 socket.

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try cleaning and adjusting the throttle if that doesnt help it may need a throttle switch

I would replace the fuel pump relay, and the engine speed sensor. I would need more information to rule one or the other out, but at this mileage, neither part is terribly expensive, and both have been known to cause your same exact condition

This could be a relay problem. (they appear to be a lot of the electrical problems with volvos.)
try twisting them gently while turning the ignition key.
You will locate them behind the ashtray, but in order to remove/replace them, you will need to remove the housing. 2 screws for the cigar lighter, and it will just 'pop off'.
good luck.

Hi!
Start by charging the battery completely. Then, start your car and while running, remove the NEGATIVE battery cable from the battery. If the car dies, your alternator is bad. If it keeps running, reinstall the battery cable and turn the car off. Check for something that's on that would drain your battery like a light in the trunk, glove box, etc. that wont shut off.

dim lights are generally bad ground / rusty -loose ground points or wires

on the engine drivers side below the air intake/below the brake fluid reservoir/ follow the large red batery cable