1994 Volvo 850 - Page 4 - Answered Questions & Fixed issues

not sure on a volvo but it did on my pontiac bonniville

I assume the speedo is working. So it looks like you will need an instrument cluster. Your local GM dealer can get you an exchange unit.

Clogged up PCV System ---maybeToo much crank case pressure

Hi,Go SEARCH on the Volvo online forums >>>>HERE - free to join.

Did you check your oil level? You may have too much oil. Does the car still run? Were there any odd noises, like pings or knocks? Flashing lights usually mean time to see a mechanic.

No matter the cause of the leak the transmission must come out.

Do you have the dash light dimmer turned off by mistake?

if it only happens below 1/4 tank this sounds like a fuel pickup problem in the tank or the fuel sending unit is off.the cheapest way to fix it is to keep the fuel level above 1/4 tank of fuel.

u have to go somewere they have a code reader

sounds like the heater core is leaking so its a nice job job taking the whole dash out to renew the heater matrix best of british with it anyway

Hi Dolphe, I'm guessing that you need to identify which of the five connections is the ground. Take out the relay and on it you should see a circuit diagram. The coil operation which operates the electro magnetic field pulling the switch, will be shown as a series of loops. It will be a normally open normally closed relay, meaning that when there is no power one of the connections will be connected and one open. When power is fed to the circuit the output switches from the one leg to the other. The ground you want is for the coil side of the relay, not the switched part. I wish I had a replacement scanner so I could draw it and let you see, but I hope you'll be able to trace through with the info I've given. Regards John

How many miles are on this vehicle? I ask because the odometers in these car stop working around the 140k to 170k mark. Did the button comeback? Is this the mileage on the digital or analog trip meter?The process to change the odometer gear is fairly straight forward and takes less than $20 and an hour. Let me know.

In order to change the transmission oil in this vehicle without a vacuum you need to remove the upper transmission line that runs into the radiator. Then attach about 3ft of 1/2 ID plastic tube (from any hardware store) to that line and into a 5 gallon bucket or other container. Start the engine and shut it off as soon as you see bubbles (may need two people for this) Then you add fresh oil to replace the amount of old oil and do this method till it runs out clean. (Takes around 12 quarts to complete) Be sure to make sure you are not letting the transmission dry! Permanent damage may result from this.Running this dry comes to a matter of second! This is why I suggest using two people, one to watch and one to run the key. Another method I have used is the drain and fill method. The drain plug on the bottom of the transmission yields 4 quarts and if you drain that and then fill it with fresh, run the car a bit (maybe to work and back) then do it again. Eventually around the third or forth change the fluid should be clean. This method takes longer but it much safer for the transmission. These cars take Mercon III/ DextronLet me know if you have any questions.

Fuel filter!! is it turbo?

Hi, I recommend you access the OBD panel to extract the trouble codes. Then send us the trouble codes for further advice. On 850 models the DLC is located in the engine compartment in front of the module box, behind the passenger side headlamp.

1. Open diagnostic socket cover and install selector cable into socket No. 2 for fuel injection codes or socket No. 6 (except Motronic systems) for ignition codes.
2. Turn the ignition switch to the ON position.
3. Enter control system 1 by pressing the button once. Hold the button for at least 1 second, but not more than 3.
4. Watch the diode light and count the number of flashes in the 3 flash series indicating a fault code. The flash series are separated by 3 second intervals. Note fault codes.

1f there are no fault codes in the diagnostic unit, the diode will flash 1-1-1 and the fuel system is operating correctly.

1. If diode light does not flash when button is pressed, or no code is flashed there is a problem with the soft-diagnostic system, proceed as follows:
   1. Check ground connections on the intake manifold, and the ground connection for the Lambda-sond at the right front mudguard.
   2. Check the fuses for the pump relay and the primary pump. On 240 models, fuses are located inside the engine compartment on the left side wheel well housing. On 760/780 models, fuses are located in the center console, just below the radio. On 740/940 models, fuses are located behind the ashtray. Access can be gained by removing the ashtray, and pressing upward on the tab marked electrical fuses press. On 850 models, the fuses are located on the left side of the engine compartment behind the strut mount plate. The fuses on 960 models are located on the far left side of the dashboard. The driver's door must be open to gain access to the fuses.
   3. Remove glove compartment, and check control unit ground connections.
   4. Turn the ignition switch to the OFF position. Remove control unit connector and connector protective sleeve.
   5. Check diagnostic socket by connecting a voltmeter between ground and No. 4 connection on the control unit connector. Reading should be 12 volts. If no voltage is present, check lead between control unit connector and fuse No. 1 in the fuse/relay box.
   6. Turn the ignition to the ON position, and install selector cable into the No. 2 socket on the diagnostic socket. Connect a voltmeter between ground and No. 12 connection on the control unit connector. Reading should be 12 volts. Press the button on diagnostic socket and note reading. Reading on the voltmeter should be 0 volts. If no voltage at the control unit is present, take reading at the diagnostic socket connector. If reading remains at 12 volts when button is pressed, check diagnostic socket.
   7. Connect a voltmeter between ground and the red/black lead on the diagnostic socket connector. Reading should be 12 volts.
   8. Connect a suitable ohmmeter between ground and the brown/black lead in the diagnostic socket connector. Reading should be 0 ohms.
   9. Turn the ignition to the OFF position. Connect ohmmeter between diagnostic socket selector cable and the pin under selector button. The ohmmeter should read infinity. Press the button and note the reading. The reading should be 0 ohms.
   10. Connect a suitable diode/multimeter tester, or equivalent, between the diagnostic socket diode light and the selector cable. Connect red test pin from the tester to pin under diode light and black test pin from tester to selector cable. A reading on the tester indicates correct diode light function. With no reading on tester, replace diagnostic socket.
   11. Check the system relay/primary relay by connecting a voltmeter between ground and the No. 9 connection on the control unit connector, then connect a jumper wire between ground and No. 21 connection on the control unit connector. The relay should activate and the reading should be 12 volts.
   
   
2. Press the diagnostic socket button. Note any additional fault codes.

The diagnostic system memory is full when it contains 3 fault codes. Until those codes are corrected and the memory erased, the system cannot give information on any other problems.

1. Press the diagnostic socket button for the third time to see if a third fault code is stored in the memory. If the diode light flashes the same code 1-1-1, there are no other codes in the memory.

Fig. Fig. 1: Push button once for mode 1
Push button twice for mode 2

Push button three times for mode 3

To clear the codes:

1. Turn the ignition switch to the ON position.
2. Read fault codes.
3. Press diagnostic socket button 1 time and hold for approximately 5 seconds. Release button. After 3 seconds the diode light should light up. While the light is still lit, press the button again and hold for approximately 5 seconds. After releasing the button, the diode light should go off.
4. To ensure that the memory is erased, press the button 1 time, for 1 second but not more than 3 seconds. The diode light should flash code 1-1-1.
5. Start and run engine. If engine will not start, correct the problem before proceeding and start over with Step 1.
6. Check to see if new fault codes have been stored in the memory by pressing the diagnostic socket button 1 time, for 1 second but not more than 3 seconds.
7. If fault code 1-1-1 flashes, it indicates that there are no additional fault codes stored in its memory.

Have you checked the brake fluid level? It may be empty. There may be air in the brake lines. You may have a bad slave cylinder, caliper or master cylinder. Don't really know what kind of "module" would cause the pedal to go to the floor. Sounds like someone making stuff up.

Not to worry. Run the engine up to operating temp before jumping to conclusions and let the heat burn off any excess oil. A leaf will not do any damage.Do not let the engine overheat while idling and if the oil light comes on switch off immediately.
The smoke from the exhaust is oil deposited by oily assembly hands just burning off. It should dissipate after about 15 minutes at most.(or 5 miles' drive)

anti lock brake system.

The yellow arrow up light is telling you, you have a fault with the ride height control system usually a bad ride height sensor on the back axle

is the tire diff from the rest it could be tread pattern or abnormal wear witch you sould be able to seee or feelyou can get free inspection at wal-mart tle or depending on your vehicle it could be berings