Question about Volvo 850

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VOLVO 850 ECC SYSTEM JUST WANT SOME FEEDBACK

I AM A CERTIFIED VOLVO TECH AND WOULD LIKE TO KNOW AT WHAT TEMP DOES THE INTERIOR TEMP IS MAINTED AT 50-60 DEGREES I REPLACED ALL I MEAN ALL THE SENSORS IT (THE ECC) HAS BEEN A PROBLEM SINCE I BOUGHT THE 1995 T-5 AND I THINK IT IS A VOLVO NIGHTMARE TO FIND THE PROBLEM I KNOW THAT THE OUTSIDE TEMP SHOULD BE 70 DEGREES OR MORE IT MIGHT BE OK IT IS FULLY CHARGED BUT IT IS HARD TO DIAGNOS THIS SYSTEM

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  • Roy McShane
    Roy McShane Apr 20, 2009

    THE FIRST THING TO TRY IS REPLACING THE CABIN FILTHER IF IT IS CLOGGED YOU GET RESTRICTED AIR FLOW AND SECOND IS TO CHECK THE AIR FLOW TO THE CONDENSOR IS UNRESTRICTED IF SYSTEM IS BLOCKED BY AIRFLOW IT WILL OVERHEAT THE RELAY IN THE ECC AND SYSTEM WILL SHUT DOWN

  • Roy McShane
    Roy McShane Apr 28, 2009

    ANOTHER PROBLEM IS THAT THE RADIATOR FAN ON A HOT DAY SHOULD AND I MEAN ALWAYS ON OTERWISE THE CONDENSOR (WONT) GET ENOUGH AIR FLOW AND CHECK ALL WIRING EVEN THE FUSE LINK IS IN THIS SYSTEM WITH NO AIR FLOW THE RELAY GETS HOT AND SHUT THE SYSTEM DOWN

  • Roy McShane
    Roy McShane May 07, 2009

    these volvo all 850,s and S70,S have a recall that volvo has hundredes of COMPLAINTS the problem and i am a ASE MASTER TECH and Volvo lied about this problem for at least 10 years and have alll kinds of consumer COMPLAINTS about the ECC/CLIMATE CONTROL system and i have done my homework it is a bad EVAPORATOR PERIOD and i am currently workingb on a patent for the system to cycle without instead of running a wire from A/C COMPRESSOR with a 40 amp fuse and a toggle switch

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YES I FIXED IT IT WAS THE THE POWER STAGE UNIT THIS ECC SYSTEM HAS 20 PAGESOF ALL KINDS OF VOLTAGE TESTS AND YOU MUST HAVE KNOWLEDGE OF THE COMPLETE SYSTEM AND WHAT TIS POWER STAGE UNIT DOES IS NOT LET THE ECC RELAYS GET TOO HOT AND SYSTEM SHUTS DOWN AND YOU MUST RUN ALL KINDS OF VOLTAGE TESTS TO PROPERLY FIX THE CLIMATE CONTROL SYSTEM AND HAVE ALL I MEAN ALL THE DIAGNOSTIC DATA ON THIS SYSTEM

Posted on Apr 16, 2009

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How to find fuse boxs


FUSE PANEL LOCATION
The fuse panel is located in the engine compartment. A label on the inside of the cover lists the fuse amperage and circuits protected.
volvo 850 fuses fuse panel layout service repair manual
FUSE PANEL IDENTIFICATION
Fig. 1: Fuse Panel Identification
Courtesy of Volvo Cars of North America.
WARNING: Always disconnect battery ground cable before servicing "high-current fuses. It is recommended that "high-current" fuses be replaced by a qualified technician.
* 1 - 15 Amp
Fuel Injection, Distributor Ignition, Automatic Gearbox
* 2 - 15 Amp
Fuel Pump, Alarm System
* 3 - 10 Amp
Courtesy Lights, Oil Level Sensor
* 4 - Not Used (1993-95)
* 4 - 10 Amp (1996)
Electronic Start Inhibitor (Immobilizer)
* 5 - 30 Amp
ECC Blower (Speed 4)
* 6 - 25 Amp
Central Locking System, Alarm
* 7 - 15 Amp
Audio System (Amplifier)
* 8 - 25 Amp (1993-95)
Power Antenna, Trailer Connector
* 8 - 40 Amp (1996)
Electronic Start Inhibitor (Immobilizer)
* 9 - 30 Amp
ABS, Traction Control System
* 10 - Not Used (1993-95)
* 10 - 15 Amp (1996)
Heated Rear Seat (If Equipped)
* 11 - 30 Amp
Heated Rear Window & Side Mirrors
* 12 - 10 Amp
Brake Lights
* 13 - 15 Amp
Hazard Flashers, Headlight Flashers, Alarm
* 14 - 30 Amp
ABS, Traction Control System
* 15 - 10 Amp (1993-95)
Audio System, Courtesy Lights, Door Open Light, Trunk Light, Glove Box Light, Remote Control Central Locking System,
Oil Level Sensor, Seat Belt Reminder
* 15 - 10 Amp (1996)
Audio System, Courtesy Lights, Door Open Light, Trunk Light, Glove Box Light, Remote Control Central Locking System,
Oil Level Sensor, Seat Belt Reminder, Data Link Connector
* 16 - 30 Amp (1993-95) Accessories
* 16 - 30 Amp (1996)
Power Antenna, Trailer Connector, Accessories
* 17 - 10 Amp
Key Reminder
* 18 - 25 Amp (1993-95)
Heated Front Seats, Power Mirrors
* 18 - 15 Amp (1996) Front Fog Lamps
* 19 - 15 Amp
Left High Beam Headlight
* 20 - 15 Amp
Right High Beam Headlight, High Beam Indicator
* 21 - 15 Amp
Left Low Beam Headlight
* 22 - 15 Amp
Right Low Beam Headlight
* 23 - 10 Amp
Left Parking Light, License Light
* 24 - 10 Amp
Right Parking Light, Bulb Failure Warning Sensor
* 25 - 10 Amp
Rear Fog Lamps, Fog Lamp Indicator
* 26 - Not Used (1993-95)
* 26 - 25 Amp (1996)
Heated Front Seats, Power Mirrors
* 27 - 15 Amp
Back-Up Lights, Turn Signals
* 28 - 10 Amp
Cruise Control, Heated Rear Window, Seat Belt Reminder Light, Shiftlock, Bulb Failure Warning Sensor, Heated Rear Seat
* 29 - 15 Amp
ABS, Traction Control System
* 30 - 10 Amp
Cigarette Lighter
* 31 - 25 Amp
ECC, ECC Blower (Speeds 1-3)
* 32 - 10 Amp
Audio System, Remote Controlled Central Locking System
* 33 - 15 Amp (1993-95)
Power Seats, OBD Test Socket, Tailgate Washer/Wipe (Wagon)
* 33 - 15 Amp (1996)
Power Seats, Tailgate Washer/Wipe (Wagon)
* 34 - 25 Amp
Windshield Wiper/Washer, Horn, Headlight Washer/Wiper
* 35 - 10 Amp
Instrument Lights, Sun Roof, Traction Control System
* 36 - Not Used
* 37 - Circuit Breaker
Power Windows, Power Sun Roof
* 38 - Not Used
* 39 - Circuit Breaker
Drivers Power Seat
* 40 - Circuit Breaker
Passengers Power Seat
RELAY PANEL LOCATION
The relay panel is located at the left corner of the instrument panel.
i copied this off a volvo site Hope this helps

Oct 10, 2016 | Volvo 850 Cars & Trucks

1 Answer

Our 2001 V70 -AC shuts off during driving and wont come back on until car is stopped turned off and restarted, you can hear compressor kick on but wont stay on regardless of temp control setting.


The A/C needs to be serviced by a certified volvo tech or some one who know's a/c very well it can be just low charge or the speed sensor on the compressor.

Jul 02, 2011 | 2001 Volvo V70

1 Answer

Fan only works on speed 4. Is the resister the problem? 1-3 do not work and was that way when i bought the used volvo 850 wagon.


If your car has Manual Climate Control (that is without ECC - Electronic Climate Control), then the problem is most likely the resistor. Costs about $85 on line. Models with ECC do not have a blower motor resistor. On those vehicles, this function is handled by the A/C Power Module. There are four different power modules, depending on your build date (chassis number). Any of them will run you about $125 on line.

Feb 24, 2011 | 1996 Volvo 850

1 Answer

The REC and AC lights flash for 20 seconds which means a fault is detected in the ECC system.Owners manual says check climate control unit? Whar do you think the cost will be.


It depends on where you take it. A Volvo dealer will be expensive so I'd look for a repair shop that specializes in electrical problems.
A side note, I've seen that happen on Volvo's before and it turned out the a/c system wasnt charged with freon. It might be cheaper to visit an a/c shop first to make sure your system is fully charged.

Nov 22, 2009 | 1993 Volvo 850

2 Answers

I blow my ECC Module in my 93 850 GLT. Where do I get used one?


salvage yards, but get them to confirm it works before you leave their place, cause most used parts especially electrical can;t be returned

Oct 24, 2009 | 1994 Volvo 850

2 Answers

1993 Volvo 850, ECC lights blinking and no fan


sounds like you bought a defective part.

Jun 12, 2009 | 1993 Volvo 850

1 Answer

My 1999 V70's AC stops working after a few minutes


this is a major problem on 850 and s-70 models with ECC climate control these cars have MAJOR problems with this system and you MUST have major knowledge of system to diagnose and fix

Jun 08, 2009 | 1999 Volvo V70

1 Answer

Ecc fan won't stop running


IT SOUNDS LIKE A RELAY PROBLEM OR TEMP SENSOR RELAY IS LOCATED W/3/PLUGS RIGHT ABOVE THE RADIATOR IN MIDDLE BELOW THE PLASTIC ABOVE THE RADIATOR

Apr 20, 2009 | 1996 Volvo 850

3 Answers

Cost and how to repair a heater core on a 1994 Volvo 850 Wagon.


The heater core on your Volvo is an easy fix. The dash does not need to come out. You remove 6 screws from the center console, pull that out of the way, pull back the carpet and there she is. A couple more screws, a tug to the back to remove the bad core and you replace in reverse. Put down a plastic bag or catch-can to get whatever coolant comes out when the core is removed. I thought I was in for an expensive repair until I researched and saw how easy the job was.

Mar 25, 2009 | 1994 Volvo 850

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