VW PASSAT 1999 – 2.8 ltr./142 kW Motronic, engine codes AQD . Wiring diagrams, Pin Connector, Location

Wiring Diagram VW PASSAT 1999 - Alternator - voltage regulator - starter - battery

A	Battery
B	Starter
C	Alternator
C1	Voltage regulator
D	Ignition/starter switch
S237	Fuse in fuse holder
T2	2-pin connector, right on engine block
T10b	6-pin connector, black, on protective housing for control units, left in engine compartment
T10d	10-pin connector, brown, on protective housing for control units, left in engine compartment
1	Earth strap, battery body
2	Earth strap, gearbox - body
500	Screw connection -1- (30), on relay plate
502	Screw connection -1- (30a), on relay plate
A17	Connection (61), in dash panel wiring harness
A52	Positive connection -2- (30), in dash panel wiring harness

Wiring Diagram VW PASSAT 1999 - Motronic control unit - ignition system - fuel pump relay - throttle valve control part

C5	Terminal 15 suppressor
G69	Throttle valve potentiometer
G88	Potentiometer
J17	Fuel pump relay (208)
J220	Motronic control unit, in protective housing, left in engine compartment
J338	Throttle valve control unit
N152	Ignition transformer
P	Spark plug connector
Q	Flame plug
S229	Fuse in fuse holder
T5e	5-pin connector, black, on ignition transformer
T6	6-pin connector, black, on throttle valve control part
T10b	10-pin connector, black, on protective housing for control units, left in engine compartment
T10e	6-pin connector, orange, on protective housing for control units, left in engine compartment
T121	121-pin connector, on Motronic control unit
V60	Throttle valve positioner
504	Screw connection -1- (87), on relay plate
D52	Positive connection (15a ignition coils control unit), in engine compartment wiring harness

Wiring Diagram VW PASSAT 1999 - Motronic control unit - engine speed sender - knock sensors

G28	Engine speed sender
G61	Knock sensor I
G66	Knock sensor II
J104	ABS with EDL control unit
J220	Motronic control unit, in protective housing, left in engine compartment
T3a	3-pin connector, blue, on left of bulkhead
T3b	3-pin connector, grey, on left of the bulkhead
T3c	3-pin connector, blue, on left of bulkhead
T10b	10-pin connector, black, on protective housing for control units, left in engine compartment
T15s	15-pin connector, red, on protective housing for control units, left in engine compartment
T31	31-pin connector, on ABS with EDL control unit
T121	121-pin connector, on Motronic control unit
220	Earth connection (sender earth), in engine wiring harness
501	Screw connection -2- (30), on relay plate
D102	Connection -2-, in engine compartment wiring harness
**	For vehicles with ASR only

Wiring Diagram VW PASSAT 1999 - Motronic control unit - intake air temperature sender - Hall sender - coolant temperature sender

G2	Coolant temperature sender
G40	Hall sender
G42	Intake air temperature sender
G62	Coolant temperature sender
G163	Hall sender 2
J220	Motronic control unit, in protective housing, left in engine compartment
J255	Climatronic control unit
J314	Air conditioner cut-off control unit
T10b	10-pin connector, black, on protective housing for control units, left in engine compartment
T12	12-pin connector, on Climatronic control unit
T15a	15-pin connector, red, on protective housing for control units, left in engine compartment (air conditioning system)
T16b	16-pin connector, on Climatronic control unit
T121	121-pin connector, on Motronic control unit
220	Earth connection (sender earth), in engine wiring harness
A64	Connection (rpm boost), in dash panel wiring harness
D102	Connection -2-, in engine compartment wiring harness
D106	Connection -4-, in engine compartment wiring harness

Wiring Diagram VW PASSAT 1999 - Motronic control unit - Lambda probes

G39	Lambda probe
G108	Lambda probe II
J217	Automatic gearbox control unit
J220	Motronic control unit, in protective housing, left in engine compartment
T4	4-pin connector, black
T4a	4-pin connector, black
T15s	15-pin connector, red, on protective housing for control units, left in engine compartment
T88	88-pin connector, on automatic gearbox control unit
T121	121-pin connector, on Motronic control unit
A121	Connection (high bus), in dash panel wiring harness
A122	Connection (low bus), in dash panel wiring harness
D101	Connection -1-, in engine compartment wiring harness
E30	Connection (87a), in engine wiring harness
---	For vehicles with automatic gearbox only

Wiring Diagram VW PASSAT 1999 - Motronic control unit - camshaft adjustment valve - air mass meter - activated charcoal filter system solenoid valve - intake manifold change-over valve

G70	Air mass meter
J220	Motronic control unit
N80	Activated charcoal filter system solenoid valve I
N156	Intake manifold change-over valve
N205	Camshaft adjustment valve -1-, grey
N208	Camshaft adjustment valve -2-, grey
S234	Fuse in fuse holder
T10e	10-pin connector, orange, on protective housing for control units, left in engine compartment
T121	121-pin connector, on Motronic control unit
D107	Connection -5-, in engine compartment wiring harness
E30	Connection (87a), in engine wiring harness

Wiring Diagram VW PASSAT 1999 - Motronic control unit - cruise control system switch (CCS) - brake light switch - clutch 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
F36	Clutch pedal switch
F47	Cruise cont. sys. brake pedal switch
J220	Motronic control unit, in protective housing for control units
S13	Fuse in relay plate fuse box
T10	10-pin connector, black, next to steering column
T15a	15-pin connector, white, on protective housing for control units, left in engine compartment
T121	121-pin connector, on Motronic control unit
A89	Connection (brake light switch), in dash panel wiring harness, pin 4
A130	Connection (CCS), in dash panel wiring harness
A154	Connection (brake pedal switch), in dash panel wiring harness
---	For vehicles with cruise control system only
*	For vehicles with manual gearbox only

Wiring Diagram VW PASSAT 1999 - Motronic control unit - injectors

D	Ignition/starter switch
J220	Motronic control unit, in protective housing, left in engine compartment
N30	Injector, cylinder 1
N31	Injector, cylinder 2
N32	Injector, cylinder 3
N33	Injector, cylinder 4
N83	Injector, cylinder 5
N84	Injector, cylinder 6
S231	Fuse in fuse holder
S232	Fuse in fuse holder
T10e	10-pin connector, orange, on protective housing for control units, left in engine compartment
T121	121-pin connector, on Motronic control unit
A2	Positive (+) connection (15), in dash panel wiring harness
A20	Connection (15a), in dash panel wiring harness
D95	Connection (injectors), in engine compartment wiring harness
---	For vehicles with cruise control system only

Wiring Diagram VW PASSAT 1999 - Motronic control unit - accelerator pedal position sender

G79	Accelerator position sender
J220	Motronic control unit
T6a	6-pin connector
T6b	6-pin connector
T10b	10-pin connector, black, on protective housing for control units, left in engine compartment
T10d	10-pin connector, brown, on protective housing for control units, left in engine compartment
T10e	10-pin connector, orange, on protective housing for control units, left in engine compartment
T15a	15-pin connector, white, on protective housing for control units, left in engine compartment
T121	121-pin connector, on Motronic control unit
12	Earth pointin, in engine compartment, left
124	Earth connection, in engine compartment right wiring harness
A27	Connection (speed signal), in dash panel wiring harness
A45	Connection (engine speed signal), in dash panel wiring harness
A131	Connection (fuel consumption signal), in dash panel wiring harness
A153	Connection (EPC), in dash panel wiring harness

Wiring Diagram VW PASSAT 1999 - Motronic control unit - secondary air pump relay - fuel pump - fuel gauge sender

G	Fuel gauge sender
G6	Fuel pump (pre-supply pump)
G169	Fuel gauge sender -2- (four wheel drive only)
G237	Fuel gauge sender -3- (four wheel drive only)
J220	Motronic control unit
J299	Secondary air pump relay, in protective housing for control units, in engine compartment
N112	Secondary air inlet valve
S130	Secondary air pump fuse, in protective housing for control units, in engine compartment
S228	Fuse in fuse holder
T4e	4-pin connector, near fuel pump
T6c	6-pin connector, blue, coupling station left A-pillar
T8	8-pin connector
T10a	10-pin connector, brown, coupling station left A-pillar
T10e	10-pin connector
T121	121-pin connector, on Motronic control unit
V101	Secondary air pump motor
75	Earth point, rear pillar, right
197	Earth connection -4-, in rear wiring harness
**	For engine code AQD only

Wiring Diagram VW PASSAT 1999 - Sender for coolant shortage indicator - speedometer sender - oil pressure switch

F1	Oil pressure switch
G22	Speedometer sender, reed contact sender left in gearbox
G32	Coolant shortage indicator sender
T2	2-pin connector, right on engine block
T3d	3-pin connector, front left in engine compartment
T6c	6-pin connector, blue, left A-pillar coupling station
T10b	10-pin connector, black, on protective housing for control units, left in engine compartment
269	Earth connection (sender earth) -1-, in dash panel wiring harness
316	Earth connection (sender earth -2-), in engine 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
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
K132	Electric throttle control fault 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
A27	Connection (speed signal), in dash panel wiring harness
A45	Connection (engine speed signal), in dash panel wiring harness
A131	Connection (fuel consumption signal), in dash panel wiring harness
A153	Connection (EPC), in dash panel wiring harness