OEM management wiring: 1.8T => Mk2 harness install FAQ

crank sensor is always worth a look on these. APU main feeds:
1 & 2 - brown - earth
3 - red/green - ignition live
21 - white/black - earth trigger for coilpack/ecu main power relay
62 - red - permanent live
65 - red/blue - earth trigger for fuel relay
121 - red/green - power from coilpack/ecu main power relay

if the donor was a passat the wiring is totally different to MK4, heres a list though I suspect its a little late now you've probably chopped and binned all the old plugs:
T10b - 10 pin, black
1 - blu - alternator pin D+
2 - grn/blu - ecu pin 37 (rev counter signal)
3 - wht/gry - oil pressure switch
4 - red - permanent live for ecu & ecu + coilpack power relay
5 - brn/yel - earth for coolant temperature and level sensors for clocks
7 - blu/yel - coolant level sensor for clocks
8 - red/blu - fuel pump relay earth trigger
9 - blu/brn - coolant temp sensor for clocks
10- brn/red - speedometer sender for clocks

T10d - 10 pin, brown
1 - grn/blk - diagnostics K-line
2 - yel/brn - ecu pin 47 (Emissions fault lamp, unused)
3 - wht/blu - vehicle speed signal
4 - red/black - starter motor pin 50
8 - blk/red - oil level temp sensor pin 1 (ignition live)
9 - blu/gry - oil level/temp sensor pin 3 (sensor feed to clocks)
10 - yel - ecu pin 81 (mpg signal, unused)

T10e - 10 pin, orange
1 - red/grn - power to ecu and coilpacks from supply relay
2 - red/brn - ecu pin 48 (EPC fault lamp, unused)
4 - red/grn - ignition live (10a fuse)
5 - grn/yel - power to injectors (fuel pump relay, 20a fuse)
6 - wht/yel - ecu pin 80 (fuel system diagnostic pump, unused)
8 - grn/yel - power for engine control valves (from fuel relay, 15a fuse)

T15a - 15 pin, white
1 - yel/blu - DBW pedal pin 4 (T6r black plug pin 1)
2 - yel/pur - DBW pedal pin 2 (T6r black plug pin 2)
3 - brn/red - DBW pedal pin 3 (T6r black plug pin 3)
4 - gry/yel - DBW pedal pin 5 (T6r black plug pin 4)
5 - gry - DBW pedal pin 1 (T6r black plug pin 5)
6 - brn/grn - DBW pedal pin 6 (T6r black plug pin 6)
7 - red/gry - cruise control
8 - blu - cruise control
9 - red/yel - cruise control
10 - blk/wht - cruise control
11 - red/black - brake light switch pin 2 (brakes on)
12 - wht/red - brake light switch pin 4 (cruise control brake switch)
13 - red/grn - clutch switch

T15s - 15 pin, red
1 - grn/brn - ABS unit (only for models with TCS)
2 - blk/yel - speed boost signal (aircon/heated screen switch)
3 - blk/gry - aircon
5 - blk/pur - ecu pin 30 (unused)
14 - org/brn - CAN-BUS LOW
15 - org/blk - CAN-BUS HIGH

 

if you have the ecu pin 3 red/green to switched live thats fine, red pin 62 you could put to the ecu relay pin 30 same as mk4 dbw. just make sure you have a 15a fuse on the ecu relay perm live feed as the coilpack wiring can be prone to cracking and shorting, plus a blown coilpack can put a high load on the feed also.

the various ecu power feeds such as maf, injectors, control valves etc are usually fed from fuel relay on their own fuses, but switched live is also ok so long as the feeds chosen can take the load

 

whats the exact code you're getting, does the relay click and give power to coilpacks? any life from fuel pump ignition on and cranking?

 

double check you see good voltage at ecu pin 62 and the ecu relay live terminal

 

should see near battery voltage ignition off, on and cranking

 

http://wiki.ross-tech.com/wiki/index.php/17748/P1340/004928

 

no the rotor is same for wide and narrow band, single trigger window. link just gives some tips for the code thats all

with VVT if the ecu has it and engine not you'll get a code for VVT not being plugged in, if ecu hasn't got it then it makes no odds if you have the vvt tensioner on the engine or not it'll be ignored either way. you can change to non-vvt tensioner to neaten it up though

 

the pinout differs for the early type actuator and later type complete pedal assembly, which are you using?

 

ok complete pedal assy.
ECU -> T10h blue plug -> pedal plug:
34 -> 1 -> 6 - Pedal Sensor 2
72 -> 2 -> 1 - 5V
73 -> 3 -> 2 - 5V
36 -> 4 -> 3 - earth
35 -> 5 -> 4 - Pedal Sensor 1
33 -> 6 -> 5 - earth