1990 Volkswagen Passat Service and Repair Manual
1990 Volkswagen Passat service and repair manual — a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.
Designed for technicians and DIY owners, this manual helps you diagnose issues correctly, follow proven repair steps, and use wiring diagrams and system sections to track faults faster.
What’s included
- Step-by-step repair procedures and service information
- Specifications and reference data (where provided)
- Electrical diagnostics with wiring diagrams
- Coverage across major systems: engine, transmission/driveline, brakes, steering, suspension, HVAC, and more
Trims covered
- GL Sedan 4-Door
- Base Sedan 4-Door
- GL Wagon 4-Door
Engines covered
- 2.0L 1984CC 121Cu. In. l4 GAS DOHC Naturally Aspirated
Index / Table of contents
- Body
- Brakes
- Chassis Electrical
- Driveline
- Engine Cooling
- Engine Electrical
- Engine Mechanical
- Engine Performance & Emission Controls
- Fuel System
- General Information & Identification
- Heating, Ventilation, & Air Conditioning
- Hybrid & Electric Vehicle Systems
- Steering
- Suspension
- Transmission, Clutch, & Transfer Case
- Wiring Diagrams
THE VENTURI TUBE LOCATED IN THE THROTTLE VALVE HOUSING CAN BECOME LOOSE AND FALL AGAINST THE THROTTLE PLATE.
THE VENTURI TUBE CAN PARTIALLY BLOCK THE THROTTLE PLATEAND PREVENT IT FROM RETURNING TO ITS FULL IDL
REPLACE THE PRESS-FIT VENTURI TUBE WITH A THREAD TYPE TUBE.
IN THE EVENT THE ENGINE OVERHEATS AND THE VEHICLE IS OPERATED CONTINUOUSLY IN THAT CONDITION, THE COOLANT PRESSURE WILL RISE TO A LEVEL AT WHICH THE HEAT EXCHANGER COULD LEAK.
A LEAKING HEAT EXCHANGER WILL ALLOW HOT COOLANT TO ESCAPE CAUSING INJURY TO THE DRIVER'S FEET OR COU
DEALERS WILL REPLACE THE HEAT EXCHANGER ON THESE VEHICLES.
VOLKSWAGEN: EXHAUST HEAT SHIELD, REPLACEMENT GUIDELINES. HEAT SHIELDS ARE TO BE INSPECTED AFTER COMPLETION O ANY TYPE OF REPAIR TO THE UNDERBODY (EXHAUST SYSTEM TRANSMISSION, ETC.), AND IF DAMAGED, REPLACED. *PE
CONDITIONS WITH ENGINE INTERMITTENTLY WILL NOT START. *YC
MANY ELECTRICAL PROBLEMS: POWER WINDOWS, IGNITION SWITCH, PASSENGER SIDE PASSIVE SEAT BELT, AUTOMATIC TRANSMISSION INTERMITTENTLY WILL NOT SHIFT INTO 4TH GEAR (TURN KEY OF AND ON TO RESET TRANSMISSION
MANY ELECTRICAL PROBLEMS: POWER WINDOWS, IGNITION SWITCH, PASSENGER SIDE PASSIVE SEAT BELT, AUTOMATIC TRANSMISSION INTERMITTENTLY WILL NOT SHIFT INTO 4TH GEAR (TURN KEY OF AND ON TO RESET TRANSMISSION
HEAT CONTROLLED FOR DRIVER'S SIDE SEAT BEGAN HEATING W/SWITCH OFF. THE FOLLOWING MORNING THE DRIVER'S SEAT BECAME PROGRESSIVELY HOT IMMEDIATELY. ONCE PULLED OVER TO CHECK, COMPARTMENT FILLED W/SMOKE A
Showing the 3 most serious of 50 complaints filed with NHTSA.
