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tdi 1Z no start |
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soerencarlsen 
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Joined: 28 Dec 12 Location: Denmark Status: Offline Points: 11 |
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 Topic: tdi 1Z no startPosted: 22 Jun 15 at 12:18 |
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hi vw t3 folks
I have resently converted to tdi with 68 pin ecu, but need to know how to check if my ecu have a problem or if the pump is bad, how to check?. It will not start/ I think the pressure is too low. I have been running with a mechanical pump until last week and that started with no problems. Cheers Soren |
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Soerencarlsen
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max and caddy
Vanorak 
Joined: 12 Dec 09 Location: Lancaster..uk Status: Offline Points: 4866 |
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Posted: 22 Jun 15 at 21:27 |
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First of all...do you have communication via the k line with a diag tool?...these engines need very little run in fact but power to the ecu is one of the things it will require..does the pump "buzz" when ignition is turned on?.
Minimum requirements are a crank signal, a power to ecu at correct pins..earth..and wiring to pump intact...will run without glow plug, air mass, pedal sender, pressure sensors, turbo..all of it! just uses fixed replace pent values for most things...I seem to recall 4 wires make it run...the rest make it work.. |
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soerencarlsen
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Joined: 28 Dec 12 Location: Denmark Status: Offline Points: 11 |
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Posted: 27 Jun 15 at 10:17 |
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Thank so much for replying. it seems when taking the pump cover off, the lever for fuel is completly shut, fully retardet! I have checked the power at the pump plug that seems ok. A little correction, when I turn the ign. on. the lever under the fuelpump cover moves about 5-6 mm then return to "0" after about 3-4 sec. Cheers Soren
Edited by soerencarlsen - 27 Jun 15 at 13:14 |
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Soerencarlsen
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VW Nerd
Yardie 
Joined: 20 Jan 08 Location: Bristol Status: Offline Points: 831 |
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Posted: 28 Jun 15 at 21:57 |
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Have you cracked open the fuel lines to remove air while cranking the engine over. No diesel with VE pump will start with air in lines as the injectors won't pass the air.
Does the engine fire at all? or just cranking over? |
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Developing parts for the VW T3 TDI market Inc flipped audi gearbox install parts.
Tim Shettle www.ultimate-engineering.co.uk Bristol Tel/txt 07810 320 464 AFN TDI Panel Van |
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timmythedog
Vanorak
westy fetishist Joined: 29 May 08 Location: Nr Grenoble Status: Offline Points: 3415 |
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Posted: 29 Jun 15 at 12:30 |
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you must get a hand held diagnostic tool.
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Syncro doka td
T4 Multivan Generation, 151 89 Caravelle Exclusive 2.1 Caravelle GL AFN tdi 53 plate T4 Panel.888 special x factor. 88 DG Panel(uncut) calypso Atlantic pop. |
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soerencarlsen
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Joined: 28 Dec 12 Location: Denmark Status: Offline Points: 11 |
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Posted: 30 Jun 15 at 16:11 |
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I agree, I need a diagnostic tool, but where to connect it? I understand that there is only one wire for diagnostic, via the imobilizer unit and when checking the obd on google, there is a lot of wires for the diagnostic. I have to get a plug ! does it matter which one ? obd2 or what.
Latest news I tied the fuel lever partly open and i started but ran very rough. Soren
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Soerencarlsen
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VW Nerd
Yardie
Joined: 20 Jan 08 Location: Bristol Status: Offline Points: 831 |
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Posted: 01 Jul 15 at 09:21 |
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You need the 16 pin plug from a VW 1996 on.
You will need to attach 3 wires, a battery live an earth and the diagnostic wire to immo or ECU. Each pin has a number but I don't have the detail on which numbers are for the wires.
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Developing parts for the VW T3 TDI market Inc flipped audi gearbox install parts.
Tim Shettle www.ultimate-engineering.co.uk Bristol Tel/txt 07810 320 464 AFN TDI Panel Van |
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soerencarlsen
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Posted: 02 Jul 15 at 19:03 |
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Got the engine started, after bleeding and some pump ajustment, plus 2 wires at the e-trottle extention, still got to get the dianostic as it seems to run in some limp mode with very retarted injection( lots of diesel smoke)
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Soerencarlsen
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VW Nerd
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Joined: 20 Jan 08 Location: Bristol Status: Offline Points: 831 |
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Posted: 02 Jul 15 at 21:05 |
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At least a step in the right direction.
:) |
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Developing parts for the VW T3 TDI market Inc flipped audi gearbox install parts.
Tim Shettle www.ultimate-engineering.co.uk Bristol Tel/txt 07810 320 464 AFN TDI Panel Van |
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soerencarlsen
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Posted: 13 Jul 15 at 18:53 |
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got hold of obd tools (china cable) but can´t get connection to ecu. then I read somewhere that some have used pin 15 on obd plug??
my ecu have nr: 028 906 021 af. I also have some issues with the wire diagram as the one for Jetta 97 says clutch and brake goes to signal earth and the other mayby (russian)says these should have 12V. the pin nr: 17 and 20
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Soerencarlsen
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syncroandy
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Joined: 18 May 05 Location: North Lancs. UK Status: Offline Points: 630 |
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Posted: 14 Jul 15 at 09:17 |
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Hi chap, on the 'early' TDI's such as yours, F36 (clutch) and F47 (CCS brake) inputs switch to earth.
T16 (OBD) pinout (ISO pin #'s): 4 Earth 6 Canbus High 7 K-line 14 Canbus Low 16 Battery + Pinout of 028906021AF: Connector Pin No. Wire colour Function T68 1 Brown T68 2 Black/Green Tachometer signal to dash panel insert T68 3 T68 4 Brown/Yellow N146 Metering adjuster (injection pump) T68 5 Brown/Yellow N146 Metering adjuster (injection pump) T68 6 T68 7 Grey/Green G149 Modulating piston movement sender T68 8 White (Shielded) G28 Engine speed sender T68 9 Lilac/White MFA Fuel cons. T68 10 T68 11 Blue (Shielded) G80 Needle Lift sender (injector 3) T68 12 Grey (Shielded) G80 Needle Lift sender (injector 3) T68 13 Brown/Red G70 Air Mass Meter T68 14 Blue/Brown G27 Engine temperature sender T68 15 White/Blue G79 Throttle sender T68 16 T68 17 White/Red F36 Clutch Pedal switch T68 18 T68 19 Red/Green G70 Air Mass Meter T68 20 White/Yellow F47 Brake Pedal switch T68 21 T68 22 T68 23 Black/Yellow J317 supply relay (109) terminal 87 T68 24 Brown T68 25 Brown/White N18 EGR Valve control signal T68 26 T68 27 T68 28 T68 29 Lilac/Black G149 Modulating piston movement sender T68 30 T68 31 T68 32 T68 33 Brown/Blue Sender earth T68 34 Blue/Grey E45 Cruise control switch T68 35 Red E45 Cruise control switch T68 36 T68 37 T68 38 Black Terminal 15 (Ignition) T68 39 Red/Black T68 40 T68 41 T68 42 Black/Lilac J317 supply relay control T68 43 Blue/White Terminal for vehicle speed signal T68 44 Black/Red F Brake Lamp T68 45 Black/Yellow J317 supply relay (109) terminal 87 T68 46 Brown T68 47 Red/Blue N75 turbo pressure control T68 48 Blue/Green Glow plug indicator T68 49 Brown/Yellow N146 Metering adjuster (injection pump) T68 50 Yellow/Blue J52 glow plug relay control T68 51 Brown/Black N108 Commencement of injection valve T68 52 White/Green G149 Modulating piston movement sender T68 53 White/Black N109 Fuel shutoff valve control T68 54 T68 55 Grey/Red G79 Throttle sender T68 56 T68 57 Yellow/Green G79 Throttle sender T68 58 T68 59 T68 60 T68 61 Grey/White Immo/Diagnostics (W-Line) T68 62 Green/White G79 Throttle sender T68 63 Yellow/Black G81 Fuel temperature sender T68 64 Blue/Yellow G72 Intake manifold temperature sender T68 65 Grey/Blue G79 Throttle sender T68 66 Black/White E45 Cruise control switch T68 67 T68 68 Black/Yellow J317 supply relay (109) terminal 87 |
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soerencarlsen
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Posted: 14 Jul 15 at 10:09 |
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Thank you
I understand then that no dammage is done if I connect pin 17 and 20 to pin 33. Soren |
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Soerencarlsen
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syncroandy
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Posted: 14 Jul 15 at 13:08 |
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No damage, but the ECU MUST see F47 switch at the same time as your F brake lamp input or else a fault is logged and it may drop to limp mode (not certain about that). F is normally earthed, then goes to 12v when the brakes come on, F47 is normally open circuit, then goes to earth when braking. I use a 5-pin relay to produce the F47 signal. F36 clutch switch is used to blip fuelling during gear changes to help smoothness.
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soerencarlsen
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Joined: 28 Dec 12 Location: Denmark Status: Offline Points: 11 |
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Posted: 20 Jul 15 at 08:41 |
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Hi again
I cannot get any connection to ecu via obd. I have tryed 3 differend vag-com cables and one wireless dongle (elm327)no connetion it only says, check if ignition is on! I have 12v on pin 7, 12v on pin 16, ground on 4 and 5. I tryed to add K line to pin 15 but no change. Any ideas anyone?? Soren Edited by soerencarlsen - 21 Jul 15 at 19:02 |
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Soerencarlsen
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soerencarlsen
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Joined: 28 Dec 12 Location: Denmark Status: Offline Points: 11 |
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Posted: 18 Aug 15 at 08:56 |
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I got a new ecu (028906021AB)as I failed to get any obd connection from the old one.
Now how do I detect if I have a early or late ecu with regards to earth or +12V at brake pedal switch. (Terminal 30 - Signal ground (early TDI) or switched 12v (late TDI)) Any info is welcome Soren |
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Soerencarlsen
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