Volkswagen Corrado (1993 year). Manual - part 108

 

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Volkswagen Corrado (1993 year). Manual - part 108

 

 

B - EMISSION APPLICATION 

(1) - Heated O2 sensor.
(2) - California only.
(3) - Digifant II only.
(4) - Two required.

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         ABBREVIATION DEFINITIONS

ABBREVIATION DEFINITION TABLE

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Abbreviation                                      Definition

AP  .............................  Air Pump Injection System
AP-EAP  ..............................  AP Electric Air Pump
AP-ERLY  .......................  AP Electric Air Pump Relay
AP-SV  ..........................  AP Solenoid (Inlet) Valve
AP-SOV  .................................  AP Shut Off Valve
CEC  .........................  Computerized Engine Controls
EGR  ............................  Exhaust Gas Recirculation
EGR-CV  .....................  EGR Control (Frequency) Valve
EGR-TS  ............................  EGR Temperature Sensor
EGR-TVV  .........................  EGR Thermal Vacuum Valve
EGR-VA  ..............................  EGR Vacuum Amplifier
EVAP  .............................  Fuel Evaporative System
EVAP-CS  ............................  EVAP Control Solenoid
EVAP-PV  .................................  EVAP Purge Valve
EVAP-VC  ..............................  EVAP Vapor Canister
FR  ..................................  Fill Pipe Restrictor
HAI  .......................................  Hot Air Intake
MIL  ...........  Malfunction Indicator (CHECK ENGINE) Light
MFI  .............................  Multiport Fuel Injection
O2  .........................................  Oxygen Sensor
PCV  .......................  Positive Crankcase Ventilation
SPK  .................................  Spark Control System
SPK-CC  ...........................  SPK Computer Controlled
TWC  ...................................  Three-Way Catalyst

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END OF ARTICLE

BRAKE SYSTEM 

         1992-93 BRAKES
         Volkswagen Disc & Drum

         Corrado SLC

         DESCRIPTION

         All models are equipped with front disc brakes. Rear brakes
are either disc or drum. Parking brake acts on rear brakes and is
cable-actuated. All models use pressure regulator between front and
rear brake circuits to avoid rear wheel lock-up during hard braking.
         A vacuum power-assist servo is used to ease brake pedal
application. A vacuum check valve, located in vacuum supply hose,
prevents vacuum leakdown when engine is off.

         SERVICING

         Manufacturer recommends replacing brake fluid every 2 years.

         BLEEDING BRAKE SYSTEM

CAUTION: Ensure fluid level in master cylinder is adequate at all
         times during bleeding procedure. Use only DOT 4 brake fluid.
         DO NOT use DOT 5 silicone brake fluid.

         BLEEDING PROCEDURES

NOTE:    Manufacturer recommends bleeding brake system using Pressure
         Bleeder (US 1116). If a pressure bleeder is not available,
         use standard bleeding procedure.

         1) Exhaust vacuum reserve from power unit by depressing brake
pedal several times. On ABS-equipped vehicles, depress brake pedal at
least 20 times to relieve system pressure.
         2) On all vehicles, fill master cylinder with clean brake
fluid. If master cylinder was replaced, bleed master cylinder before
bleeding wheel calipers. Connect bleeder hose to appropriate caliper
bleeder valve. See BRAKE BLEEDING SEQUENCE table.

BRAKE BLEEDING SEQUENCE TABLE

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Application (1)                                     Sequence

Corrado SLC  ..................  Either Front Caliper First,
                                   Either Rear Caliper First

(1) - Push lever of pressure regulator in direction of rear
      axle when bleeding rear brakes.

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BRAKE SYSTEM 

         ADJUSTMENTS

         BRAKE PRESSURE REGULATOR

CAUTION: DO NOT adjust pressure regulator with brake pedal depressed.

         1) Depress brake pedal once firmly. Release brake pedal
quickly, watching for regulator lever to move when pedal is released.
If regulator lever does not move when pedal is released, replace
regulator. If regulator lever moved, go to next step.
         2) Ensure vehicle fuel tank is full, luggage compartment is
empty and a driver is in driver seat. Raise and support vehicle. Using
Pressure Gauges (US 1016), attach one gauge to right rear brake
cylinder or caliper. If vehicle is ABS-equipped, go to next step. If
vehicle is not  ABS-equipped, go to step 4).
         3) Using Distributor "T" (803 611 755) and an additional 8"
(203 mm) of brakeline, connect one gauge in front of pressure
regulator. Bleed pressure gauge and hoses through valve on gauges.
Lower vehicle. Bounce rear of vehicle several times. Go to step 5).
         4) Attach Pressure Gauges (US 1016) to left front brake
caliper. Bleed pressure gauge and hoses through valve on gauges. Lower
vehicle. Bounce rear of vehicle several times.
         5) Pump brake pedal several times. Press on brake pedal until
reading on front gauge shows pressure given for first reading in the
BRAKE PRESSURES table. Hold brake pressure to specification. Rear
gauge reading should be within specification given for first reading
in the BRAKE PRESSURES table.
         6) Increase pressure on brake pedal until reading on front
gauge shows pressure given for second reading in the BRAKE PRESSURES
table. Hold brake pressure to specification. Rear gauge reading should
be within specification given for second reading in BRAKE PRESSURES
table. If pressures are within specification, brake pressure regulator
is functioning properly. If pressures are not within specification, go
to next step.
         7) If pressure is too high, decrease spring pressure on
regulator. If pressure is too low, increase spring pressure on
regulator. If adjusting spring pressure on regulator does not bring
pressures within specification, replace pressure regulator. Disconnect
gauges, and bleed brakes.

BRAKE SYSTEM 

BRAKE PRESSURES TABLE

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                       Front Gauge                Rear Gauge
Application           psi (kg/cm

ý

)              psi (kg/cm

ý

)

1st Reading  .........  725 (51)  .........  391-478 (28-34)
2nd Reading  ........  1450 (102)  ........  696-783 (49-55)

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         STOPLIGHT SWITCH

NOTE:    Stoplight switches mounted on master cylinder are
         non-adjustable.

         Adjustable stoplight switch is located above brake pedal. See
Fig. 2. To adjust, loosen lock nut. Turn switch until distance between
brake pedal arm and first thread on switch body is .20-.24" (5-6 mm).
Tighten lock nut.

Fig. 2:  Adjusting Stoplight Switch
Courtesy of Volkswagen United States, Inc.

 

 

 

 

 

 

 

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