| T68 connector (ECU) Pin descriptions for 1997 Jetta TDI motor |
| NOTE: refer
to Jetta/TDI wiring diagram at |
| http://www.haywood-sullivan.com/vanagon/TDI/1996_Jetta_TDI_wiring_LONG3.pdf |
| Row 1 |
Row 2 |
Row 3 |
| Pin |
Color |
Connects to |
Description |
Pin |
Color |
Connects to |
Description |
Pin |
Color |
Connects to |
Description |
| 1 |
BR |
 156 |
Ground
connection in DFI wiring harness |
24 |
BR |
 156 |
Ground
connection in DFI wiring harness |
46 |
BR |
156 |
Ground
connection in DFI wiring harness |
| 2 |
SW/GN |
T28/10 via G1(12) |
Tachometer |
25 |
BR/WS |
N18 |
EGR Vacuum
Regulator Solenoid Valve |
47 |
RO/BL or BR/BL? |
N75 |
Wastegate Bypass
Regulator Valve |
| 3 |
Not used |
26 |
SW/BR |
J360 |
High-Heat Output
relay (Pin 3) |
48 |
BL/GN |
G2(5) |
K29 Glow plug
indicator Light |
| 4 |
BR/GE |
 F26 |
wire connection
2 in DFI wiring harness |
27 |
NOTE: this wire is indicated in the Jetta/TDI Bentley manual but
was missing on my harness |
49 |
BR/GE |
 F26 |
wire connection
2 in DFI wiring harness |
| 5 |
BR/GE |
F26 |
wire connection
2 in DFI wiring harness |
28 |
BR/GR |
J246 |
AC (Automatic
Only?) |
50 |
GE/BL |
J52 via G1(3) |
Glow Plug Relay |
| 6 |
SW/BL |
J360 |
Low Heat Output
Relay (Pin 1) |
29 |
LI/SW |
G149 |
Modulating
Piston Displacement Sensor |
51 |
BR/SW |
N108 via T24(13) |
Injection Valve
Commencement via 24-pin connector on left cylinder head |
| 7 |
GR/GN |
G149 |
Modulating
Piston Displacement Sensor |
30 |
Not used |
52 |
WS/GN |
G149 |
Modulating
Piston Displacement Sensor |
| 8 |
WS |
G28 |
Engine Speed
Sensor |
31 |
BL |
T10/7 |
Automatic Only? |
53 |
WS/SW |
N109 via T24(12) |
Fuel Shut-off
valve via 24-pin connector on left cylinder head |
| 9 |
LI/WS |
T28/26 |
Multi Function
Display (Fuel Consumption?) |
32 |
GR |
T10/9 |
Automatic Only? |
54 |
Not used |
| 10 |
NOTE: this wire is indicated in the Jetta/TDI Bentley manual but
was missing on my harness |
33 |
BR/BL or BR/WS? |
 220 |
Ground
connection (sensor ground) in engine compartment wiring harness |
55 |
GR/RO |
G79 |
Throttle
Position Sensor |
| 11 |
BL |
G80 |
Lift Needle
Sensor |
34 |
BL/GR |
E45 |
Cruise Control
Switch |
56 |
NOTE: this wire is indicated in the Jetta/TDI Bentley manual but
was missing on my harness |
| 12 |
GR |
G80 |
Lift Needle
Sensor |
35 |
RO |
E45 |
Cruise Control
Switch |
57 |
GE/GN |
G79 |
Throttle
Position Sensor |
| 13 |
BR/RO |
G70 |
Mass Air Flow
(MAF) Sensor |
36 |
Not used |
58 |
Not used |
| 14 |
BL/BR |
G62 via T24(20) |
Coolant Temp
Sensor via 24-pin connector on left cylinder head |
37 |
GN/GR |
F38 |
Ambient
temperature Switch AC (Automatic Only?) |
59 |
Not used |
| 15 |
WS/BL |
G79 |
Throttle
Position Sensor |
38 |
SW |
G1(4) |
Switched Power
(15) |
60 |
WS/GE |
K |
Instrument
Cluster (Idiot Light?) NOTE: this wire is indicated by Bentley only |
| 16 |
Not used |
39 |
RO/SW |
|
Alternator (DF
terminal) |
61 |
GR/WS |
ODB (or J362) |
OBD connector
(pin 7 K-line) (or Immobilizer Control Unit) |
| 17 |
WS/RO |
F36 |
Clutch Pedal
Switch |
40 |
Not used |
62 |
GN/WS |
G79 |
Accelerator
Position Sensor |
| 18 |
GE/RO |
T10/4 |
Automatic Only? |
41 |
Not used |
63 |
GE/SW |
G81 |
Fuel Temperature
Sensor |
| 19 |
RO/GN |
G70 |
Mass Air Flow
(MAF) Sensor |
42 |
SW/LI |
J317 via G1(7) |
Terminal 30
Volatage Supply Relay |
64 |
BL/GE |
G72 |
Intake Air
Temperature |
| 20 |
WS/GE |
F47 |
Brake Vacuum
Vent Valve Switch |
43 |
BL/WS |
TV13 |
Vehicle Speed
Signal wire |
65 |
GR/BL |
G79 |
Accelerator
Position Sensor |
| 21 |
Not used |
44 |
SW/RO |
TV11 |
Brake Light
Switch |
66 |
SW/WS |
E45 |
Cruise Control
Switch |
| 22 |
Not used |
45 |
SW/GE |
 F25 |
wire connection
1 in DFI wiring harness |
67 |
|
| 23 |
SW/GE |
 F25 |
wire connection
1 in DFI wiring harness |
|
Not used |
68 |
SW/GE |
F25 |
wire connection
1 in DFI wiring harness |
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