ENGINE PERFORMANCE – Volkswagen Jetta GL 1999 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

1.9L

1.9L Turbo Diesel, Engine Performance Wiring Diagrams (1 of 3) for Volkswagen Jetta GL 1999

List of elements for 1.9L Turbo Diesel, Engine Performance Wiring Diagrams (1 of 3) for Volkswagen Jetta GL 1999:

• (center of firewall) g121
• (m/t)
• (not used)
• A/t
• Air conditioning system
• Cruise control system
• Diesel direct fuel injection (dfi) engine control module (ecm) (at base of windshield, in center of plenum)
• Fuse 10a
• Fuse 110a
• Fuse 15a
• Fuse bracket
• Fuse panel
• Generator
• Hot at all times
• Intake manifold flap changeover valve (on intake manifold)
• M/t
• Manifold absolute pressure (map) sensor & intake air temperature (iat) sensor (in air intake duct)
• Red
• Throttle position (tp) sensor/ closed throttle position (ctp) switch/kickdown switch (above accelerator pedal)
• Wastegate bypass regulator valve (left rear side of engine compt)

1.9L Turbo Diesel, Engine Performance Wiring Diagrams (2 of 3) for Volkswagen Jetta GL 1999

List of elements for 1.9L Turbo Diesel, Engine Performance Wiring Diagrams (2 of 3) for Volkswagen Jetta GL 1999:

• (center of firewall) g121
• (m/t)
• A/t
• Brakelight switch (above brake pedal)
• Clutch vacuum vent valve switch (above clutch pedal) (m/t only)
• Coolant glow plugs (m/t only)
• Coolant preheating relay (high heat output) (left rear corner of engine compartment) (m/t only)
• Coolant preheating relay (low heat output) (left rear corner of engine compartment) (m/t only)
• Egr vacuum regulator solenoid valve (on center of firewall)
• Engine glow plugs
• Fuse 10a
• Fuse 50a
• Fuse bracket
• Fuse panel
• G202 (beside steering column)
• Glow plug relay (on thirteen- fold auxiliary relay panel)
• Hot at all times
• M/t
• Positive crankcase ventilation (pcv) heating element (between cylinder head cover and intake air duct, in pcv hose)
• Red

1.9L Turbo Diesel, Engine Performance Wiring Diagrams (3 of 3) for Volkswagen Jetta GL 1999

List of elements for 1.9L Turbo Diesel, Engine Performance Wiring Diagrams (3 of 3) for Volkswagen Jetta GL 1999:

• (m/t)
• (under left side of dash) data link connector (dlc)
• Air conditioning system
• Antilock brakes system
• Cold start injector (at left side of engine, on bottom of diesel direct fuel injection pump)
• Diesel direct fuel injection (dfi) engine control module (ecm) (at base of windshield, in center of plenum)
• Engine coolant temperature (ect) sensor (on cylinder head)
• Engine speed (rpm) sensor (left side of cylinder block)
• Fuel cut off valve (at left side of engine, on top of diesel direct fuel injection pump)
• Fuel temperature sensor/modulating piston displacement sensor/quality adjuster (at left side of engine, on front of diesel dfi pump)
• Fuse 10a
• Fuse panel
• Glow plug ind
• Hot in run or start
• Instrument cluster
• Malfunction indicator lamp (mil)
• Mass airflow (maf) sensor (right side of air cleaner housing)
• Nca
• Needle lift sensor (left side of engine head)
• T32
• T32a
• Transmission controls system (a/t only)

2.0L

2.0L, Engine Performance Wiring Diagrams (1 of 3) for Volkswagen Jetta GL 1999

List of elements for 2.0L, Engine Performance Wiring Diagrams (1 of 3) for Volkswagen Jetta GL 1999:

• (at right of air cleaner housing, in intake air duct)
• (on center of firewall)
• Air conditioning system
• Anti-lock brake system
• Evaporative emission (evap) canister purge regulator valve (next to engine coolant reservoir)
• Fuse 10a
• Fuse panel
• G121
• Heated oxygen sensor (ho2s) (ahead of 3-way catalytic converter)
• Hot at all times
• Instrument cluster
• Leak detection pump (in right rear wheelhousing)
• Malfunction indicator light (mil)
• Mass airflow (maf) sensor & intake air temperature (iat) sensor
• Motronic engine control module (ecm) (at base of windshield, in center plenum)
• Oxygen sensor (o2s) (at back of 3-way catalytic converter)
• Secondary air injection (air) solenoid valve (above brake fluid reservoir)
• T32
• T32a
• Transmission controls system

2.0L, Engine Performance Wiring Diagrams (2 of 3) for Volkswagen Jetta GL 1999

List of elements for 2.0L, Engine Performance Wiring Diagrams (2 of 3) for Volkswagen Jetta GL 1999:

• (center of firewall) g121
• (right side of firewall) g123
• Data link connector (dlc) (under left side of dash)
• Engine speed (rpm) sensor (left side of of engine)
• Fuel pump
• Fuel pump relay
• Fuse 15a
• Fuse 28 10a
• Fuse 32 10a
• Fuse 34 10a
• Fuse 43 10a
• Fuse 50a
• Fuse bracket
• Fuse panel
• G202 (behind left side of dash)
• Hot at all times
• Hot in run or start
• Ignition switch
• Knock sensor (ks) 1 (left front side of engine)
• Knock sensor (ks) 2 (left side of engine, behind ignition coil)
• Nca
• Off
• Positive crankcase ventilation (pvc) heating element (in fresh air intake hose)
• Red
• Relay panel
• Run
• S3/3
• S3/6
• Secondary air injection (air) pump relay (at left side of engine compt, behind air cleaner housing)
• Secondary air injection pump motor (left rear side of engine)
• Start

2.0L, Engine Performance Wiring Diagrams (3 of 3) for Volkswagen Jetta GL 1999

List of elements for 2.0L, Engine Performance Wiring Diagrams (3 of 3) for Volkswagen Jetta GL 1999:

• (not used)
• Anti-lock brake system
• Brake- light switch (above brake pedal)
• Camshaft position (cmp) sensor (on cylinder head)
• Engine coolant temperature (ect) sensor (on cylinder head, in coolant flange)
• Fuel injectors
• Fuse 10a
• Fuse panel
• G121 (center of firewall)
• Hot at all times
• Ignition coil
• Motronic engine control module (ecm) (at base of windshield, in center plenum)
• Nca
• Throttle valve control module (on throttle body)
• To spark plugs
• W/ cruise
• W/o cruise

2.8L

2.8L, Engine Performance Wiring Diagrams (1 of 3) for Volkswagen Jetta GL 1999

List of elements for 2.8L, Engine Performance Wiring Diagrams (1 of 3) for Volkswagen Jetta GL 1999:

• (not used)
• (pins 6-24 not used)
• Acc
• Accelerator pedal position sensors 1 & 2 (in pedal assembly)
• Air conditioning system
• Anti-lock brakes system
• Cruise control system
• Data link connector
• Evaporative emission (evap) canister purge regulator valve (right side of eng compt)
• Fuel pump relay
• Fuse 10a
• Fuse 15a
• Fuse 50a
• Fuse bracket
• Fuse panel
• G121 (center of firewall)
• Heated oxygen sensor (ho2s) (ahead of three way catalytic converter)
• Hot at all times
• Ignition switch
• Leak detection pump (ldp) (inside right rear wheelhousing)
• Lock
• Mass airflow (maf) sensor & intake air temperature (iat) sensor (in intake air duct)
• Motronic engine control module (ecm) (center of firewall, in plenum)
• Nca
• Oxygen sensor (o2s) (rear of catalytic converter)
• Red
• Relay panel
• Run
• S3/1
• S3/2
• S3/3
• S3/5
• S3/6
• Start
• Starting/ charging system

2.8L, Engine Performance Wiring Diagrams (2 of 3) for Volkswagen Jetta GL 1999

List of elements for 2.8L, Engine Performance Wiring Diagrams (2 of 3) for Volkswagen Jetta GL 1999:

• (beside steering column) g202
• (mfi only)
• (mil)
• Air bag control module
• Engine speed (rpm) sensor (lower left front side of eng cylinder block)
• Fuel pump (in fuel tank)
• Fuse 10a
• Fuse panel
• G123 (right side of firewall)
• Instrument cluster
• Knock sensor (ks) 1 (right rear of engine cylinder block)
• Knock sensor (ks) 2 (left front of engine cylinder block)
• Malfunction indicator lamp
• Nca
• Red
• Secondary air injection (air) pump motor (front left side of engine)
• Secondary air injection (air) pump relay (left rear of engine compt)
• Secondary air injection (air) solenoid valve (front left side of engine)
• T32/11
• T32/13
• T32/21
• T32/25
• T32/3
• T32/32
• T32a/10
• T32a/32

2.8L, Engine Performance Wiring Diagrams (3 of 3) for Volkswagen Jetta GL 1999

List of elements for 2.8L, Engine Performance Wiring Diagrams (3 of 3) for Volkswagen Jetta GL 1999:

• (center of firewall)
• (center of firewall) g121
• (front left side of engine) intake manifold change-over valve
• (in take air duct) positive crankcase ventilation (pvc) heating element
• Brake- light switch (above brake pedal)
• Camshaft position (cmp) sensor (left side of engine cylinder head)
• Clutch vacuum vent valve switch (above clutch pedal)
• Cruise control system
• Engine coolant temperature (ect) sensor (left front of engine, in coolant flange)
• Fuel injectors
• Fuse 10a
• Fuse 7.5a
• Fuse panel
• G121
• Hot at all times
• Ignition coil (on left side of cylinder head)
• Motronic engine control module (ecm) (center of firewall, in plenum)
• Nca
• Spark plugs
• Throttle valve control module (on throttle body)
• Transmissions system