SERVICE MANUAL
  Applies to: Hyundai Coupe/Tiburon 1998-2000
GROUP
Heating, Ventilation & Air Conditioning Vacuum System
Return to Main Menu(s):      Mechanical Manual      Electrical Manual

VACUUM SYSTEM 
SYMPTOM AND PROBABLE CAUSE IN AIR FLOW MODE CONTROL SYSTEM
Symptom
Probable cause
On "FLOOR" position.
All air through defroster or DEF/FLOOR.
  • Blue and/or and vacuum hose pinched or disconnected at vacuum motor.
  • Black source hose pinched or disconnected at the connector.
  • Engine compartment vacuum source hose pinched or disconnected at the vacuum manifold.
  • Defective vacuum motor.
On "DEF/FLOOR" position.
All air through defroster.
  • Blue hose pinched or disconnected at vacuum motor.
  • Black source hose pinched or disconnected at the connector.
  • Engine compartment vacuum source hose pinched or disconnected at the vacuum manifold.
  • Defective vacuum motor.
On "PANEL VENTS" position.
All air through defroster.
  • Yellow vacuum hose pinched or disconnected at vacuum motor.
  • Black source hose pinched or disconnected at the connector.
  • Engine compartment vacuum source hose pinched or disconnected at the vacuum manifold.
  • Defective vacuum motor.
On "PANEL/FLOOR" position.
All air through defroster or panel
  • Yellow vacuum hose pinched or disconnected at vacuum motor.
  • Blue hose pinched or disconnected at vacuum motor.
  • Black source hose pinched or disconnected at the connector.
  • Engine compartment vacuum source hose pinched or disconnected at the vacuum manifold.
  • Defective vacuum motor.
On "DEF" position. (No vacuum)
On "RECIRC" position. All air through fresh.
  • White vacuum hose disconnected at the connector or recirc duct vacuum motor.
  • Black source hose pinched or disconnected at the connector.
  • Engine compartment vacuum source hose pinched or disconnected at the vacuum manifold.
  • Defective vacuum motor.
Engine poor idle
  • Engine compartment vacuum source hose disconnected.