VW PASSAT 1999 – 1.9 ltr./66 kW direct injection turbo-diesel, engine code AHU, with automatic gearbox . Wiring diagrams, Pin Connector, Location

Wiring Diagram VW PASSAT 1999 - Battery - starter - alternator - engine glow plugs

A	Battery
B	Starter
C	Alternator
C1	Voltage regulator
D	Ignition/starter switch
Q6	Glow plugs - (engine)
S125	Engine glow plugs fuse, in protective housing for control units, left in engine compartment
T2b	2-pin connector, blue, right on engine block
T6n	6-pin connector, red, on protective housing, left in engine compartment
T10d	10-pin connector, brown, on protective housing, left in engine compartment
1	Earth strap, battery body
2	Earth strap, gearbox - body
A17	Connection (61), in dash panel wiring harness
F31	Connection (glow plugs - engine), in diesel direct injection system wiring harness

Wiring Diagram VW PASSAT 1999 - Control unit for Diesel direct injection system - kick-down switch - ldling switch - accelerator position sender

F8	Kick-down switch
F60	Idling switch
G79	Accelerator position sender
J52	Glow plug relay
J248	Diesel direct injection system control unit, in protective housing for control units
J317	Terminal 30 voltage supply relay, control number (219), in protective housing for control units
S102	Engine control unit fuse, in protective housing for control units
T6a	6-pin connector, on fuel injection pump
T10e	10-pin connector, yellow, on protective housing for control units, in left engine compartment
T10g	10-pin connector, white, on protective housing, left in engine compartment
T68	68-pin connector, diesel direct injection system control unit
32	Earth point, behind dash panel, left
81	Earth connection -1-, in dash panel wiring harness
135	Earth connection -2-, in dash panel wiring harness
A32	Positive connection (30), in dash panel wiring harness
F28	Connection -3-, in diesel direct injection system wiring harness

Wiring Diagram VW PASSAT 1999 - Diesel direct injection system control unit - air mass meter - engine speed sender - intake manifold temperature sender

G28	Engine speed sender
G70	Air mass meter
G72	Intake manifold temperature sender
J248	Diesel direct injection system control unit, in protective housing for control units
J397	Radiator fan run-on relay
T3	3-pin connector, black, near engine speed sender
T10b	10-pin connector, black, on protective housing, left in engine compartment
T10d	10-pin connector, brown, on protective housing, left in engine compartment
T10e	10-pin connector, yellow, on protective housing, left in engine compartment
T68	68-pin connector, diesel direct injection system control unit
12	Earth point, in engine compartment, left
156	Earth connection, in diesel direct injection wiring harness
220	Earth connection (sender earth), in engine wiring harness
A45	Connection (engine speed signal), in dash panel wiring harness
*	For engine code AFN only

Wiring Diagram VW PASSAT 1999 - Diesel direct injection system control unit - coolant temperature sender - quantity adjuster - modulating piston movement sender - fuel temperature sender

D	Ignition/starter switch
G2	Coolant temperature gauge sender
G62	Coolant temperature sender
G81	Fuel temperature sender
G149	Modulating piston movement sender
J248	Diesel direct injection system control unit, in protective housing for control units
N146	Metering adjuster
S231	Fuse in fuse holder
T6n	6-pin connector, red, on protective housing, left in engine compartment
T8a	8-pin connector, near fuel injection pump
T10b	10-pin connector, black, on protective housing, left in engine compartment
T68	68-pin connector, diesel direct injection system control unit
220	Earth connection (sender earth), in engine wiring harness
A2	Positive (+) connection (15), in dash panel wiring harness
F26	Connection -2-, in diesel direct injection system wiring harness

Wiring Diagram VW PASSAT 1999 - Diesel direct injection system control unit - needle lift sender - exhaust gas recirculation valve - commencement of injection valve - fuel shut-off valve

G80	Needle lift sender
J248	Diesel direct injection system control unit, in protective housing for control units
N18	Exhaust gas recirculation valve
N75	Charge pressure control solenoid valve
N108	Commencement of injection valve
N109	Fuel shut-off valve
T2	2-pin connector, brown, on needle lift sender
T3	3-pin connector, near fuel injection pump
T10d	10-pin connector, brown, on protective housing, left in engine compartment
T10g	10-pin connector, white, on protective housing, left in engine compartment
T68	68-pin connector, diesel direct injection system control unit
156	Earth connection, in diesel direct injection wiring harness
A10	Connection (glow plug control), in dash panel wiring harness
A27	Connection (speed signal), in dash panel wiring harness
F25	Connection -1-, in diesel direct injection system wiring harness

Wiring Diagram VW PASSAT 1999 - Diesel direct injection system control unit - brake light switch - brake pedal switch for cruise control system (CCS)

F	Brake light switch
F47	Cruise cont. sys. brake pedal switch (diesel direct inj. system)
J217	Automatic gearbox control unit
J248	Diesel direct injection system control unit, in protective housing for control units
J397	Radiator fan run-on relay
S13	Fuse in relay plate fuse box
T10d	10-pin connector, brown, on protective housing, left in engine compartment (chamber 6, chamber 8 - air conditioning system)
T10g	10-pin connector, white, on protective housing, left in engine compartment
T10e	10-pin connector, yellow, on protective housing for control units, in left engine compartment
T10k	10-pin connector, grey, coupling station left A-pillar
T68	68-pin connector, diesel direct injection system control unit
T68a	68-pin connector, on automatic gearbox control unit (4 speed automatic)
A15	Positive connection (15), in instrument wiring harness
A42	Connection (fuel gauge), in dash panel wiring harness
A89	Connection (brake light switch), in dash panel wiring harness
F25	Connection -1-, in diesel direct injection system wiring harness
---	For vehicles with CCS only
*	For engine code AFN only
**	For vehicles with air conditioning system only

Wiring Diagram VW PASSAT 1999 - Diesel direct injection system control unit - switch for cruise control system (CCS)

E45	Cruise control system switch Position 0 = OFF in detent Position 1 = OFF with button Position 2 = ON Position 3 = RES
E227	Cruise control system (CCS) button (Set)
J217	Automatic gearbox control unit
J248	Diesel direct injection system control unit, in protective housing for control units
T10	10-pin connector, black, on CCS switch
T10b	10-pin connector, black, on protective housing, left in engine compartment
T10d	10-pin connector, brown, on protective housing, left in engine compartment
T10e	10-pin connector, yellow, on protective housing, left in engine compartment
T10h	10-pin connector, blue, on protective housing, left in engine compartment
T10m	10-pin connector, brown, coupling station right A-pillar
T68	68-pin connector, diesel direct injection system control unit
T68a	68-pin connector, on automatic gearbox control unit (4 speed automatic)
T88	88-pin connector, on automatic gearbox control unit (5 speed automatic)
156	Earth connection, in diesel direct injection wiring harness
---	For vehicles with CCS only

Wiring Diagram VW PASSAT 1999 - Oil pressure switch - fuel gauge sender - speedometer sender - coolant shortage indicator sender - ambient temperature sender

F1	Oil pressure switch
G	Fuel gauge sender
G17	Ambient temperature sensor
G22	Speedometer sender, left in gearbox
G32	Coolant shortage indicator sender
T1	Single connector, brown, coupling station left A-pillar
T2a	2-pin connector, front left in engine compartment
T2c	2-pin connector, front left in engine compartment
T6c	6-pin connector, blue, coupling station left A-pillar
T10a	10-pin connector, brown, coupling station left A-pillar
T10b	10-pin connector, black, on protective housing, left in engine compartment
T10e	10-pin connector, yellow, on protective housing, left in engine compartment
30	Earth point -1-, next to relay plate
75	Earth point, rear pillar, right
156	Earth connection, in diesel direct injection wiring harness
197	Earth connection -4-, in rear wiring harness
269	Earth connection (sender earth) -1-, in dash panel wiring harness
A73	Connection (ambient temperature display), in dash panel wiring harness

Wiring Diagram VW PASSAT 1999 - Dash panel insert - optical and acoustic oil pressure warning - odometer display - coolant shortage and coolant temperature indicator - fuel gauge

G1	Fuel gauge
G3	Coolant temperature gauge
G5	Rev. counter
H11	Oil pressure warning buzzer
J285	Control unit with display in dash panel insert
K2	Alternator warning lamp
K3	Oil pressure warning lamp
K28	Coolant temperature/coolant shortage warning lamp
K29	Glow period warning lamp
L75	Digital display illumination
T32a	32-pin connector, blue, on dash panel insert
T32b	32-pin connector, green, on dash panel insert
Y4	Odometer display

Wiring Diagram VW PASSAT 1999 - Dash panel insert - multi-function indicator - multi-function indicator switch

E86	Multi-function display call-up button
E109	Multi-function display, memory switch
G21	Speedometer
J119	Multi-function display
J285	Control unit with display in dash panel insert
T4h	4-pin connector, black, right next to steering column
T32b	32-pin connector, green, on dash panel insert
A92	Connection (MFA Reset), in dash panel wiring harness
A93	Connection (MFA left), in dash panel wiring harness
A94	Connection (MFA right), in dash panel wiring harness