1993 VOLKSWAGEN CORRADO check engine

A/C COMPRESSOR OIL CHECKING
Article Text (p. 14)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 08:47PM
2) Add one ounce of refrigerant oil when replacing
evaporator. Add1/2 ounce when replacing condenser. When replacing
receiver-drier or hoses, add 1/3 ounce per component replaced.
HARRISON
R4 4-CYLINDER
1) Before checking and adjusting oil level, operate engine at
800-1000 RPM. Set controls at maximum cooling and high blower motor
speed for 20 minutes to return oil to compressor.
2) Stop engine. Discharge refrigerant and remove compressor
from vehicle. See SERVICING PRECAUTIONS. Remove oil drain plug and
measure amount of oil drained.
3) If amount drained is less than one ounce, conduct leak
tests at system connections. Repair or replace faulty parts as
necessary. Fill compressor with 2 ounces, using new refrigerant oil.
4) If amount drained is more one ounce, oil level is okay.
Fill compressor with same amount drained, using new oil.
5) When replacing other A/C system components, add the
following amount(s) of refrigerant oil. See COMPONENT REFRIGERANT OIL
CAPACITIES (HARRISON R4 4-CYLINDER) table.
COMPONENT REFRIGERANT OIL CAPACITIES (HARRISON R4 4-CYLINDER)ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄComponent Ounces
Condenser ............................................... 1.0
Evaporator .............................................. 1.7
Receiver-Drier .......................................... 1.0
Refrigerant Lines ....................................... 0.3
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ V5 5-CYLINDER
1) If system is operable, run A/C system for several minutes
to stabilize system. Turn off engine. Discharge system and remove
compressor. See SERVICING PRECAUTIONS. Remove drain plug and measure
oil.
2) If one ounce or more is drained, add same amount. If less
than one ounce is drained, add 2 ounces of new refrigerant oil to
compressor.
3) If condenser is replaced, add one ounce. Add 3.5 ounces if
accumulator is replaced. If evaporator is replaced or if a large
refrigerant leak occurred, add 3 ounces of new refrigerant oil.
HITACHI
6-CYLINDER
1) Before checking and adjusting oil level, operate
compressor at 1000-1500 engine RPM, and set controls at maximum

A/C COMPRESSOR OIL CHECKING
Article Text (p. 15)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 08:47PM
cooling and high blower motor speed for about 10 minutes to return oil
to compressor.
2) Stop engine. Discharge refrigerant and remove compressor
from vehicle. See SERVICING PRECAUTIONS. Drain oil from compressor
through suction port. Measure amount of oil drained.
3) If amount drained is 2.4 ounces or more, fill with same
amount using new oil. If amount drained is less than 2.4 ounces, fill
with 2.4 ounces. Install compressor and recharge.
4) If A/C components are replaced, add refrigerant oil to
system. Add 1.7 ounces if condenser is replaced. Add 2.4 ounces if
evaporator is replaced. Oil does not need to be added if receiver-
drier is replaced. Add 1.7 ounces of refrigerant oil only if a
refrigerant oil leak is indicated.
MATSUSHITA
ROTARY VANE
Geo (Prizm)
1) If system is operable, run A/C system for several minutes
to stabilize system. Turn off engine. Discharge system and remove
compressor. See SERVICING PRECAUTIONS. Remove drain plug and measure
oil.
2) If one ounce or more is drained, add same amount. If less
than one ounce is drained, add 2 ounces of new refrigerant oil to
compressor.
3) If condenser is replaced, add one ounce. Add 3.5 ounces if
receiver-drier is replaced. If evaporator is replaced or if a large
refrigerant leak occurred, add 3 ounces of new refrigerant oil.
Toyota
Discharge system. See SERVICING PRECAUTIONS. Remove
compressor from vehicle. Drain oil from compressor through inlet and
outlet ports. Fill compressor with 3.4-4.1 ounces of oil through
suction port. Add 0.7 ounces if receiver-drier was replaced. When
replacing condenser or evaporator, add 1.4-1.7 ounces of refrigerant
oil.
NIPPONDENSO
ROTARY VANE
1) Before checking and adjusting oil level, operate
compressor at engine idle speed, and set controls at maximum cooling
and high blower motor speed for 20-30 minutes to return oil to
compressor.
2) Stop engine. Discharge refrigerant and remove compressor
from vehicle. See SERVICING PRECAUTIONS. Drain compressor oil through
compressor intake and discharge ports. Measure amount drained.
3) Fill compressor with same amount as drained, plus one
ounce. When replacing condenser, add one ounce. When replacing
evaporator, add 1 1/2 ounces. When replacing receiver-drier, add 1/3

A/C COMPRESSOR OIL CHECKING
Article Text (p. 18)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 08:47PM
component replaced.
Honda
1) Discharge system. See SERVICING PRECAUTIONS. Remove
compressor from vehicle. Drain all oil from NEW compressor and fill
compressor with 4 ounces of clean refrigerant oil.
2) On Civic and Civic Del Sol, add 1 1/2 ounce of refrigerant
oil when replacing evaporator. Add 2/3 ounce when replacing condenser.
When replacing receiver-drier or hoses, add 1/3 ounce per component
replaced.
3) On Prelude, add one ounce of refrigerant oil when
replacing evaporator. When replacing other A/C components, add 1/3
ounce per component replaced (including hoses).
Hyundai
Add 1 1/2 ounces of refrigerant oil when replacing
evaporator. Add one ounce when replacing condenser. When replacing
receiver-drier, add 1/3 ounce of refrigerant oil.
5-CYLINDER
Mazda
Add one ounce of refrigerant oil when replacing condenser.
Add 1 2/3 ounce when replacing evaporator. When replacing receiver-
drier, add 1/2 ounce of refrigerant oil.
NOTE: Saab and Volvo (Sanden 5 or 7-cylinder) compressor oil
checking procedures are not available from manufacturer.
7-CYLINDER
Hyundai & Mitsubishi (Excel & Precis)
1) Before checking and adjusting oil level, operate
compressor at engine idle speed, and set controls at maximum cooling
and high blower motor speed for 20-30 minutes to return oil to
compressor.
2) Stop engine. Discharge refrigerant and remove compressor
from vehicle. See SERVICING PRECAUTIONS. Remove oil drain plug and
drain oil. Measure amount of oil drained. Install drain plug with new
"O" ring.
3) If amount drained is 2.3 ounces or more, fill compressor
with same amount using new oil. If amount drained is less than 2.3
ounces, fill with 2.3 ounces. Install filler plug. Install compressor
and recharge system.
COMPONENT REFRIGERANT OIL CAPACITIES (SANDEN 7-CYLINDER)ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄComponent Ounces
Condenser ............................................ 1.0
Evaporator ............................................. 3
Receiver-Drier ......................................... 1

A/C COMPRESSOR OIL CHECKING
Article Text (p. 19)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 08:47PMÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ Jaguar (XJS)
1) Operate engine at idle speed for 10 minutes, to return
refrigerant oil to compressor. Stop engine. Discharge refrigerant. See
SERVICING PRECAUTIONS. Clean area around compressor filler plug and
remove plug slowly.
2) Determine angle at which compressor is mounted. Insert
compressor dipstick diagonally until stop on dipstick contacts filler
plug surface. See Fig. 1. Remove dipstick and note oil fill level.
Each increment on dipstick represents one ounce of oil.
3) Determine amount of oil needed according to mounting
angle. See COMPRESSOR OIL CAPACITIES (JAGUAR XJS) table for specified
amount.
4) If necessary, correct compressor oil level. Install
compressor oil plug, and tighten it to 72-108 INCH lbs. (8-12 N.m).
Evacuate and recharge A/C system. Perform leak test.Fig. 1: Checking Jaguar XJS Compressor Oil Level (Sanden 7-Cylinder)
Courtesy of Jaguar Cars, Inc.
COMPRESSOR OIL CAPACITIES (JAGUAR XJS)
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄMounting Angle (In Degrees) Oil Level In Increments
0 .................................................... 3-5
10 ................................................... 4-6
20 ................................................... 5-7
30 ................................................... 6-8
40 ................................................... 7-9
50 .................................................. 8-10
60 .................................................. 9-11
90 ................................................. 10-12
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ Volkswagen
1) The use of refrigerant recovery/recycling is recommended

A/C COMPRESSOR OIL CHECKING
Article Text (p. 20)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 08:47PM
by manufacturer. After refrigerant recovery process is completed, the
amount of compressor oil removed must be measured and the same amount
added to A/C system.
2) On Cabriolet, add 2/3 ounce of refrigerant oil when
replacing evaporator. When replacing condenser or receiver-drier, add
1/3 ounce of refrigerant oil per component replaced.
3) On Corrado SLC, Golf, GTI, Jetta and Passat, add 2/3 ounce
of refrigerant oil when replacing evaporator. When replacing condenser
or receiver-drier, add 1/3 ounce of refrigerant oil per component
replaced.
4) On EuroVan, add one ounce of refrigerant oil when
replacing evaporator. Add 1/2 ounce when replacing condenser (2/3
ounce on vehicles with rear A/C). When replacing receiver-drier, add
1/3 ounce (2/3 ounce on vehicles with rear A/C).
SEIKO-SEIKI
ROTARY VANE
Saab (9000)
The A/C system is filled with 6.6 ounces of compressor oil.
The compressor must be topped off with the specified amount. See
COMPONENT REFRIGERANT OIL CAPACITIES (SEIKO-SEIKI ROTARY VANE) table.
Topping off should be carried out on the high pressure side of the
compressor.
COMPONENT REFRIGERANT OIL CAPACITIES (SEIKO-SEIKI ROTARY VANE)ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄComponent Ounces
Compressor .......................................... (1) 2.3
Condenser ............................................... 1.3
Expansion Valve ......................................... 0.6
Evaporator .............................................. 1.3
Receiver-Drier .......................................... 1.3
Refrigerant Lines ....................................... 0.6
(1) - To avoid an excessive amount of oil in the A/C system, oil
must be drained from the compressor before it is installed.
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ ZEXEL
NOTE: Isuzu and Subaru compressor oil checking procedures are not
available from manufacturer.
ROTARY VANE
Nissan
1) Before checking and adjusting oil level, operate engine at
1200 RPM. Set controls at maximum cooling and high blower motor speed
for 10 minutes to return oil to compressor.

A/C COMPRESSOR OIL CHECKING
Article Text (p. 21)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 08:47PM
2) Stop engine. Discharge refrigerant. See SERVICING
PRECAUTIONS. Measure the amount of oil drained/discharged into
refrigerant recovery/recycling equipment.
3) Remove compressor from vehicle. Drain compressor oil from
compressor drain plug and measure oil amount. Add this amount to
amount drained in step 2), to obtain total amount drained.
4) Fill compressor with total amount drained, using new oil.
If any major components of the system were also replaced, determine
the amount of additional oil needed. See COMPONENT REFRIGERANT OIL
CAPACITIES (ZEXEL ROTARY VANE & 6-CYLINDER) table for specified
amount.
COMPONENT REFRIGERANT OIL CAPACITIES (ZEXEL ROTARY VANE & 6-CYLINDER)ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄComponent Ounces
Condenser
Altima & Maxima ............................................... 2.5
NX, Pickup, Sentra & 300ZX ................................ 1.0-1.7
Evaporator
Altima & Maxima ............................................... 2.5
NX, Pickup, Sentra & 300ZX ................................ 1.5-2.5
Receiver-Drier
Altima & Maxima ............................................... 0.2
NX, Pickup, Sentra & 300ZX ................................ 0.5-0.8
Refrigerant Lines (1) .......................................... 1.0
(1) - Add only if a refrigerant oil leak is indicated.
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ 6-CYLINDER
Audi
1) The use of refrigerant recovery/recycling is recommended
by manufacturer. After refrigerant recovery process is completed, the
amount of compressor oil removed must be measured and the same amount
added to A/C system.
2) Add one ounce of refrigerant oil when replacing
accumulator. When replacing condenser, add amount drained from
condenser plus 1/3 ounce of refrigerant oil. When replacing
evaporator, add amount drained from evaporator plus 2/3 ounce of
refrigerant oil.
Nissan
1) Before checking and adjusting oil level, operate engine at
1200 RPM. Set controls at maximum cooling and high blower motor speed
for 10 minutes to return oil to compressor.
2) Stop engine. Discharge refrigerant. See SERVICING
PRECAUTIONS. Measure the amount of oil drained/discharged into
refrigerant recovery/recycling equipment.
3) Remove compressor from vehicle. Drain compressor oil from
compressor drain plug and measure oil amount. Add this amount to

A/C SYSTEM GENERAL DIAGNOSTIC PROCEDURES
Article Text
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 08:48PM
ARTICLE BEGINNING
1993 AIR CONDITIONING & HEAT
A/C General Diagnostic Procedures
Diagnosis is an important first step in A/C system servicing.
To save time and effort, systems should be carefully checked to
identify the causes of poor performance. By using the following
diagnostic charts, defective components or system problems can be
quickly located. To identify problems that are specific to one system,
refer to the repair section of this manual. The charts in this section
apply to all systems.
PREPARATION FOR TESTING
1) Attach Low and High pressure gauges.
2) Start engine and allow to warm up.
3) Set system to COOL and blower to HIGH.
4) Open car doors and hood.
5) Run engine at fast idle for 2-3 minutes.
AIR CONDITIONING SYSTEM PERFORMANCE CHECK
AIR CONDITIONING SYSTEM PERFORMANCE CHECK TABLEÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄPERFORM TESTS: SHOULD BE: IF:
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄTemperature Check Temperature Check Is:
* Switch to LOW blower.
* Close doors.
* Check outlet temperature. 35-45
ø F Too warm - Check
control lever
operation, heater
water valve, cooling
system and gauge readings.
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄPERFORM TESTS: SHOULD BE: IF:
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄVisual Check Visual Check Shows:
* Compressor Quiet with no leaks Noisy - Check belts,
oil level, seals,
gaskets, reed valves.
* Condenser Free of obstructions Blocked - Clean off.
Plugged - Flush or
replace.
* Receiver-Drier Dry and warm to touch Frosty - Check for
restriction, replace
desiccant.

A/C-HEATER SYSTEM - MANUAL
Article Text (p. 4)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 08:49PM
too low. This protects compressor if not enough refrigerant is in
system. Low-pressure cut-out switch shuts compressor off at about 29
psi (2.0 kg/cmý).
THERMOSWITCH
Thermoswitch shuts compressor off if coolant temperature is
greater than 248
øF (120øC).
ADJUSTMENTS
AIR DISTRIBUTION CONTROL
1) Move air distribution control knob to defrost position.
Connect 3-foot long control cable to footwell/defrost flap lever. Push
flap lever toward cable and secure cable sheath with retainer clip.
2) Move air distribution control knob to panel (vent)
position. Connect 2-foot long control cable to center flap lever. Push
flap lever away from cable and secure cable sheath with retainer clip.
TEMPERATURE CONTROL
Move temperature knob to full cool position. Connect
temperature control cable (Blue sheath) to temperature flap lever.
Push flap lever away from cable and secure cable sheath with retainer
clip.
TROUBLE SHOOTING
NO COOLING
1) Ensure blower fan motor operates in all 4 speeds. Ensure
air duct closes off outside air and heater water valve is closed.
Clean condenser.
2) Inspect receiver-drier pressure seal. If seal is good, go
to step 3). If seal is broken, replace seal. Evacuate and recharge
system. If system cools properly, testing is complete. If system does
not cool, connect pressure gauges.
3) Adjust engine speed to 2500 RPM. Set controls for maximum
cooling and high fan. Insert thermometer in left air duct and close
all other ducts. With vehicle in shade, close windows and doors and
connect pressure gauges. Operate system for 10 minutes.
4) If fan does not operate, replace pressure switch. Ensure
system is okay. If fan does come on, turn engine off, and check for
condenser obstructions and blocked airflow.
5) Turn air conditioner on and off with temperature control.
Ensure compressor clutch engages. Push lever to extreme right position
and back again. A click should be heard from compressor clutch. If a
click is not heard, check for voltage at clutch coil wire with switch
on. If voltage is present, replace clutch coil. If voltage is not
present, check wiring or replace thermostatic switch.
6) If compressor clutch operates, check gauge readings. If