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

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

A	Battery
B	Starter
C	Alternator
C1	Voltage regulator
D	Ignition/starter switch
Q6	Glow plugs - engine
S125	Glow plugs fuse - engine, in control unit protective housing, in engine compartment, left
T2b	2-pin connector, blue, on engine block, right
T6n	6-pin connector, red, on control unit protective housing, in engine compartment, left
T10d	10-pin connector, brown, on control unit protective housing, in engine compartment, left
1	Earth strap, battery - body
2	Earth strap, gearbox - body
500	Screw connection -1- (30), on relay plate
504	Screw connection -1- (87F), on relay plate
A17	Connection (61), in dash panel wiring harness
A52	Positive (+) connection (30), in dash panel wiring harness
F31	Connection (glow plugs - engine) in diesel direct injection system wiring harness

Wiring Diagram VW PASSAT 1999 - Diesel direct injection system control unit - kick–down switch - idling switch - accelerator pedal position sender

F8	Kick-down switch
F60	Idling switch
G79	Accelerator pedal position sender
J52	Glow plug relay
J248	Diesel direct injection system control unit, in control unit protective housing
J317	Terminal 30 voltage supply relay, in control unit protective housing
S102	Engine control unit fuse, in control unit protective housing
T6a	6-pin connector, on the injection pump
T6n	6-pin connector, red, on control unit protective housing, in engine compartment, left
T10e	10-pin connector, yellow, on control unit protective housing, in engine compartment, left
T10g	10-pin connector, white, on control unit protective housing, in engine compartment, left
T80	80-pin connector, on diesel direct injection system control unit
81	Earth connection -1-, in dash panel wiring harness
135	Earth connection -2-, in dash panel wiring harness
A2	Positive (+) connection (15), in dash panel wiring harness
A52	Positive (+) connection (30), in dash panel wiring harness
F28	Connection -3-, in diesel direct injection system wiring harness
F33	Positive (+) connection (30), in diesel direct injection system wiring harness

Wiring Diagram VW PASSAT 1999 - Diesel direct injection system control unit - engine speed sender - intake manifold pressure sender - needle lift sender - intake manifold temperature sender

G28	Engine speed sender
G71	Intake manifold pressure sender
G72	Intake manifold temperature sender
G80	Needle lift sender
J248	Diesel direct injection system control unit, in control unit protective housing
T2	2-pin connector, brown, near needle lift sender
T3	3-pin connector, black, near engine speed sender
T10b	10-pin connector, black, on control unit protective housing, in engine compartment, left
T10e	10-pin connector, yellow, on control unit protective housing, in engine compartment, left (chamber 2 - self-diagnosis connection)
T80	80-pin connector, on diesel direct injection system control unit
12	Earth point, in engine compartment, left
32	Earth point, behind dash panel, left
81	Earth connection -1-, in dash panel wiring harness
156	Earth connection, in diesel direct injection wiring harness
A45	Connection (engine speed signal), in dash panel wiring harness

Wiring Diagram VW PASSAT 1999 - Diesel direct injection system control unit - coolant temperature sender - metering adjuster - modulating piston movement sender - fuel temperature sender - fuel shut–off valve - commencement of injection valve

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 control unit protective housing
N108	Commencement of injection valve
N109	Fuel shut-off valve
N146	Metering adjuster
T3	3-pin connector, near injection pump, only engine codes AHU and AFN
T8a	8-pin connector, near injection pump, only engine codes AHU and AFN
T10b	10-pin connector, black, on control unit protective housing, in engine compartment, left
T10g	10-pin connector, white, on control unit protective housing, in engine compartment, left
T10x	10-pin connector, near injection pump, only engine codes AHH
T80	80-pin connector, on diesel direct injection system control unit
A10	Connection (glow plug control), in dash panel wiring harness
F25	Connection -1-, in diesel direct injection system wiring harness
F26	Connection -2-, in diesel direct injection system wiring harness

Wiring Diagram VW PASSAT 1999 - Diesel direct injection system control unit - air mass meter - exhaust gas recirculation valve - charge pressure control solenoid valve

G70	Air mass meter
J217	Automatic gearbox control unit, in footwell, front right
J248	Diesel direct injection system control unit, in control unit protective housing
J397	Radiator fan run-on relay
N18	Exhaust gas recirculation valve
N75	Charge pressure control solenoid valve
T10d	10-pin connector, brown, on control unit protective housing, in engine compartment, left
T10e	10-pin connector, orange, on control unit protective housing, in engine compartment, left
T10i	10-pin connector, blue, connector point right A pillar
T10k	10-pin connector, grey, connector point left A-pillar
T68a	68-pin connector, on automatic gearbox control unit
T80	80-pin connector, on diesel direct injection system control unit
A15	Positive (+) connection (15), in instruments wiring harness
A27	Connection (speed signal), in dash panel wiring harness
A70	Connection (15a, fuse 231), in dash panel wiring harness
F25	Connection -1-, in diesel direct injection system wiring harness
---	Only models with cruise control system (CCS)
*	Only engine codes AFN

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

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)
F	Brake light switch
F47	Cruise control system brake pedal switch/diesel direct inj. system
J217	Automatic gearbox control unit, in footwell, front right
J248	Diesel direct injection system control unit, in control unit protective housing
T10	10-pin connector, black, next to steering column
T10b	10-pin connector, black, on control unit protective housing, in engine compartment, left
T10d	10-pin connector, brown, on control unit protective housing, in engine compartment, left
T10e	-10-pin connector, yellow, on control unit protective housing, in engine compartment, left
T10g	-10-pin connector, white, on control unit protective housing, in engine compartment, left
T10m	10-pin connector, right A pillar
T68a	68-pin connector, on automatic gearbox control unit
T80	80-pin connector, on diesel direct injection system control unit
T88	88-pin connector, on automatic gearbox control unit (Five speed automatic)
A89	Connection (brake light switch), in dash panel wiring harness
---	Only models with cruise control system (CCS)

Wiring Diagram VW PASSAT 1999 - Diesel direct injection system control unit

J217	Automatic gearbox control unit, in footwell, front right
J248	Diesel direct injection system control unit, in control unit protective housing
T10d	10-pin connector, brown, on control unit protective housing, in engine compartment, left (chamber 6 -connection for air conditioner) (chamber 8 -connection for air conditioner)
T10h	10-pin connector, blue, on control unit protective housing, in engine compartment, left
T68a	68-pin connector, on automatic gearbox control unit (4 speed automatic)
T80	80-pin connector, on diesel direct injection system control unit
T88	88-pin connector, on automatic gearbox control unit (5 speed automatic)
156	Earth connection, in diesel direct injection system wiring harness
A75	Connection (Kick-down switch), in dash panel wiring harness
A131	Connection (fuel consumption signal), in dash panel wiring harness

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

F1	Oil pressure switch
G	Fuel gauge sender
G22	Speedometer sender, left in gearbox
G23	Fuel pump (syncro only)
G32	Coolant shortage indicator sender
G169	Fuel gauge sender -2- (four-wheel drive only)
G237	Fuel gauge sender -3- (four-wheel drive only)
J17	Fuel pump relay, on the 13 position additional relay carrier (four-wheel drive only) control number (214)
S228	Fuse in fuse box
T3d	3-pin connector, in engine compartment, front left
T4e	4-pin connector
T6c	6-pin connector, blue, connector point left A-pillar
T10a	10-pin connector, brown, connector point, left A pillar
T10b	10-pin connector, black, on control unit protective housing, in engine compartment, left
T10e	10-pin connector, yellow, on control unit protective housing, in engine compartment, left
75	Earth point, rear pillar, right
156	Earth connection, in diesel direct injection system wiring harness
197	Earth connection -4-, in rear wiring harness
269	Earth connection (sender earth) -1-, in dash panel wiring harness
A86	Connection (50a), in dash panel wiring harness

Wiring Diagram VW PASSAT 1999 - Dash panel insert - optical and acoustical 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