1992 Volvo 740 - Answered Questions & Fixed issues

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Volvo Forum • 93 850 GLT Dash warning lights - Matthews Volvo Site

www.matthewsvolvosite.com/forums/viewtopic.php?f=1&t=14654 Apr 6, 2008 - 11 posts Next to the service engine light, orange with green triangle and upside down Y. Does anyone have the manual/know what this means?Missing: red ‎square

1) Faulty coil, connections to coil, or other secondary wire issues, cap/rotor defective2) Faulty switching node (this is the Bosch "ignition amplifier module" on the driver's fenderwell, front.3) Faulty crank angle sensor or connector4) Rare, faulty ignition computerNotes on the coil: Positive is a fused feed. Verify you have 12 VDC at this point with the coil disconnected and reference this to ground with KOEO (KP II). The 'ground' circuit is switched by the aforementioned ignition amplifier on the driver's fenderwell which is switched by the ignition module.Crank angle sensor must be functioning for ignition system to work. If this is faulty, the entire system shuts down. This is located at the top of the bellhousing, rear of engine. Take care upon removal or installation, the bracket is fragile.

CAUTION: NEVER DISCONNECT THE BATTERY TERMINALS WITH THE ENGINE RUNNING. This will instantly destroy the 6-way rectifier/voltage regulator.Check that the Generator Failure light comes on and stays on with key on and engine off. N.G., verify your connections on the back of the generator. This circuit must function or the generator will never charge the battery. If this indicator circuit is miswired (the small spade connector is disconnected, plugged into the wrong connection or otherwise nerfed) the voltage regulator open-circuits the field (rotor) windings and in turn, the generator will never charge and freewheel. Check the circuit from the connector on the back of the generator all the way to the dash, verifying the light bulb in the dash is good. My trick is to wire in a small 3 watt bulb (or a continuity light) in series with the circuit under the hood. Turn the key on to KP II and verify it lights up. Others: Check ground from generator to engine. This is usually a large blue cable that ties off onto a bracket near the air valve. Check ground from engine to body. Check ground from battery to body to engine. Must read less than 1 ohm on your megger.

It doesn't matter if the exhaust is leaking if the car won't start. The smell... does it smell like gasoline? If you have a new alternator and battery, then I would focus on the fuel system. Fuel pump, fuel injector, leaking fuel line, bad spark plugs, bad distributor cap, bad spark wires, oxygen sensor, etc.

Check spark plugs. If completely black and looks burnt, replace them

1 Turn key to position 12 Press odometer button and while doing so turn the key to position 23 Hold odometer button until hazard triangle in center of dash flashes,when this occurs,release the button.4 Start the car and the light should be off.Radio station presets will be lost after this reset so write down the ones you like before beginning procedure.

Ok, the problem you're having is not very common however to solve this you need to replace the flywheel with the one that come with your new engine because the gears on both flywheel are different and the speed sensor will have difficulty reading the gears.Therefore the car will either misfire or not start. Did you relpace the engine with a 940 volvo 93 and up?

The most common cause of this is that the electric heating grid in the seat is defective. To repair this the seat must have the cover removed and a new grid installed, you will likely need to replace the control switch at the same time, also look under the seat and make sure no wiring is damaged on the seat support springs and shorted to ground. The de-trimming (removal of seat coverings) is best left to automotive trim shop as removing and installing a seat cover is a real pain if you don't have the correct tools and skills to remove the retaining clips that hold the cover to the frame, they are called "hog rings".

I bought a Craftsman socket at OSH hardware. Very shallow 6-point socket with a universal joint built into it. I think it was 18mm but I don't have it handy at the moment so check the size. That socket with a couple of extensions worked like a charm.
.........Or you can drop the engine...........:-)

most of the cars made for Europe are equipped with a( thermostat ) but don`t confuse it with air conditioner thermostat or thing is working like valve that stops water circulating in cold starts so the water will only circulate around the engine block not through the radiator and of coarse it helps heat up your car`s engine faster but the problem comes when that valve got old (by the way most of those valves working as a wax capsule when the water heats to some amount the wax molten so it opens the way for water to circulate through the radiator ) what happens is simply the wax looses some of its function and molten in higher temp . so it block the water again until it heats up to molt the wax my advice : get off that part and just don`t replace it if you found it pricey for you your car still working but will needs more time to warm up i hope i was useful for u sir .

NEED ADJUST SET IGNITION TIMING.MOST TIME YOU INSTALL ANOTHER NEW ENGINE.THE IGNITION TIMING AT DISTRIBUTOR OFF TIME LITTLE TOO FAR ADVANCE CAUSING WEAK SPARKS FOULING OUT SPARK PLUGS. CHECK FUEL PRESSURE SOON AS ENGINE STOP AGAIN DONT TURN ON IGNITION SWITCH CHECK FUEL PRESSURE.SHOULD BE 43 PSI. IF NOT 0 FUEL PUMP BAD OR FUEL PUMP RELAY FAULTY OR FUEL FILTER STOPPED UP.IF FUEL SYSTEM GOOD PROBLEM IN THE IGNITION TIMING.

Does your car just not turn on right after you get down driving or do you allow it to cool first before you drive it again. if it's the latter of the 2 then i have a solution for you.
If your car fails to start until after it has cooled down, the three items to check are the RPM SENSOR, RADIO SUPPRESSION RELAY, and fuel injection relay solder points. *Try the fuel injection relay. Find the relay in your center console relay bank and tap it to see if this restores fuel flow (starting immediately). When you're cranking the engine and it won't start, is the tachometer needle moving a little? If not, as mine didn't, I believe you want to check into the RPM sensor. Check the RPM sensor located on the back of your engine, connected to the bell housing. The wire runs up the back of the engine compartment towards the drivers side. Look for the part number on the wire and check if the part number ends with 399. This rpm sensor has a heat related problem: common for it to cause a no- start but able to start a little while later. Since I replaced mine for about 30$ I haven't had the problem. The third common cause of no-hot-restart conditions is failure of the radio suppression relay. This relay is usually mounted beneath the coolant expansion tank and may be next to the identical coolant fan relay. You can often test it by swapping leads with the coolant fan relay, but only if the latter is working. This may not be the case in cooler regions where it is not frequently used. Hopefully this will help you :)

not very good one to fix , somtimes cables that operate opening and closing of air vents bellow dash separate , and stop from opening , i think you will find most things under foot panels near passenger feet . and center consol near passenger feet . , you may need to take of those panels to see is you can visially see anything .

on the rad either at the bottom or on the side is a transmission cooler built into the radiator, its leaking

the engine is either not getting fuel, or is not getting spark. with the ignition key in the "run" position, listen under the rear of the car (near the fuel tank) for the sound of the fuel pump. or, after cranking on the starter for a while, remove a spark plug and smell it. smells like gas? if so, the problem lies in the electrical area. if not, fuel is not getting to the engine.

thats sounds like your fuel pump might be going out

That only leaves 1 item in the loop that can cause this. The Fuel pump itself. Replace the in tank fuel pump.

it could be the altinator, you can take it to advance auto and they will checkit for ree, good luck

sounds like a failed VSS