When to turn on the ECC in a Volvo 850?
The ECC control module normally supplies voltage to A/C relay, except when heater (blower motor) fan is off and vehicle speed is less than 20 MPH, when heater fan is off and recirculation is on, or momentarily when under full acceleration.
What happens when the AC is turned off on a Volvo 850?
If A/C is switched off using the AC OFF switch, ECC control module will cut supply voltage to relay, turning off compressor. However, this does not apply when air distribution control is in defrost setting, since A/C is always on in this case.
How to Shim the clutch on a Volvo 850?
Here’s how to shim the AC clutch on an 850, V70/XC70 up to 2000, S70, or C70. Do not use the high pressure port that is right up front above the radiator. That’s the high side for shops with pro AC refill equipment. Instead, move a couple items out of the way and use the AC low port.
Where is the low pressure line on a Volvo 850?
It is located on the passenger side of the engine compartment near the radiator and is marked with a “ 70NM ” [ Volvo 850 Low Pressure Line] The best photo documentation on how to get to the Volvo 850, S70 and V70 evaporator, period: Changing an Evaporator Core – in Pictures
How does the air conditioner work in a Volvo 850?
The heater (blower motor) fan is controlled by ECC output (power) stage. Air conditioning system will only operate above 32 F (0 C). Blower switch must not be in zero position to allow compressor to engage. interior temperature sensors, and duct temperature sensors.
What’s the low pressure switch on a Volvo 850?
The high- pressure and safety switch cut power to the A/C compressor if pressure in the A/C high-pressure circuit becomes excessive, supplying a signal to ECM to start cooling fan. The low-pressure switch (pressostat) turns A/C compressor on and off to maintain pressure within limits. floor/defroster damper motor.
What’s the problem with my 1993 Volvo 850?
Just the little annoying things that can drive you nuts trying to resolve if you don’t know the cause and where to begin fixing it. Beginning with the 1993 850 Volvo began using an upper engine mount (also called the upper engine stabilizer) that helped to control engine movement especially during acceleration.
What is the diagnostic code for Volvo 850?
Adaptive HO2S Control, Provides Leaner Mixture At Idle 5-1-2 ……………. HO2S Integrator At Maximum Lean Running Limit (1) – See FUEL INJECTION DIAGNOSIS under DIAGNOSTIC TROUBLE CODE TESTING for fault code diagnosis.
What kind of climate control does a Volvo 850 have?
The temperature control damper motors, recirculation damper motor, floor/defroster damper motor, and ventilation damper motor are all identical, but their control range varies according to the damper being controlled.
How to test for a fault in a Volvo 850?
CODE TESTING for fault code diagnosis. 1) Disconnect diagnostic unit “A”. Turn ignition on. Check for voltage at diagnostic connector terminal No. 4. If voltage is not present, check fuse and wiring. If voltage is present, turn ignition off. No. 8 and ground. Ohmmeter should indicate approximately zero ohms.
What kind of car is the Volvo 850?
Volvo Cars of Princeton was very competitive and had a wide range of vehicles that we were interested in. We ended up purchasing a CPO 2018 XC60 T6 R-Design. Ed was both professional and caring and took care of every detail.
How does the heater work on a Volvo 850?
The ventilation damper is operated by damper motor through 2 gear segments; one fitted to damper motor shaft and the other on ventilation damper shaft. Heater (blower motor) fan speed is variably controlled by ECC output (power) stage in response to signals from ECC control module.