3b s2 coupe resurrection

[ericd]

andy ,

do you know if the 65535 code showed up previously if the ecu as ran in another car?? , is it a modified/chipped ecu , 65535 used to be a lot of things , bad earth, modified code , chacksum mismatch etc

[quattro-nick]

It was the same in both.

Engine;



Metal dizzy gear I am sure, rotor is spinning with the engine.

it seems you have a motronic thats programmed for car with automatic transmision
andy,maybe you can adapt the coding in ecu with vagcom

[andy10v]

It was the same in both.

Engine;



Metal dizzy gear I am sure, rotor is spinning with the engine.

[newsh]

Just do fault codes in engine, the rest of it is nonsense on a 3B.

Is your dizzy drive cog plastic or metal?

[andy10v]

Tried fault codes on the main screen, and fault codes in engine, the second two pictures are of a notepad file of the fault codes log.

[newsh]

Did you click on the "Fault Codes - 02" button in the first pic, whilst in the engine page? I've never seen a screen like that before..

[andy10v]

Does sound like the injector ground as the ecu grounds the injectors to fire them. Assuming that they have power!

Going to check they have power.

I think you may have interrogated the whole car rather than just the ecu!

Thinking about it some more there is a connection between the hall sensor and the injectors isn't there although I can't see that effecting the output test without the engine running.

3/55 - ECU-controlled ground for the J17 Fuel Pump Relay - BR/Y - ECU triggers the relay after it gets the G40 cam position sensor signal by pulling the J17 fuel pump relay to ground through pin 3.

8/55- Constant power supply to ECU J220 - R/R- from power terminal 30 (+12V) Fuse S26 (5A) - passenger footwell as shown HERE, in this above ECU fuse panel call-out post). This constant power also feeds the Holding Relay for its work during start-up and shut-down.

37/55-Switched +12V for all 5 Fuel injectors (N30-N83) and MAF (G70)- BK/R - Provides ignition-on power to injectors and MAF during starting conditions and then power to the MAF for the hot-wire burn-off after the ignition is turned off all via a "Holding Relay" in the ECU. (Main power to the injectors and MAF comes through the J17 FP relay via pin 87A and the S72 thermofuse after the engine is started).

[twoqu]

Thinking about it some more there is a connection between the hall sensor and the injectors isn't there although I can't see that effecting the output test without the engine running.

[andy10v]

Thanks for the offer, I might take you up once I have checked everything.

I hope its something stupid, it was running, I was dicking about in the engine bay and now it doesnt, injectors dont click when doing an output test so it could be something simple.

[twoqu]

I think you may have interrogated the whole car rather than just the ecu!

[twoqu]

Does sound like the injector ground as the ecu grounds the injectors to fire them. Assuming that they have power!

[Error404]

do you wanna borrow a stock ABY ECU & injectors?

[andy10v]

Nah, I only have one coil on plug ECU. The ECU was tested for a week in another car before I got it.

If I can get the injectors to click when doing an output test it would be a step in the right direction, so that is my thing to sort.

[Error404]

WTF are all those fault codes about??! Something is not right there surely. I can't remember, have you tried another ECU?

[andy10v]

Found an ECU pin out with operations courtesy of Dave

http://www.s2forum.com/forum/showthread.php?t=24073

1/55 - Output to Power Output Stage - N122- G/W- for Coil No. 1 (N122 Pin 4/4)

2/55 - Output to Power Output Stage - N122 - V/BK - for Coil No. 2 (N122 Pin 3/4)

3/55 - ECU-controlled ground for the J17 Fuel Pump Relay - BR/Y - ECU triggers the relay after it gets the G40 cam position sensor signal by pulling the J17 fuel pump relay to ground through pin 3.

4/55 - ECU-controlled ground for the N71 Idle Air Control Valve (aka Idle Stabilization Valve (ISV)) - W/Y - the ISV is used to control the idle, e.g. when the air conditioning compressor comes on or coming to a stop.

5/55 - ECU-controlled ground for the N80 Evaporative Emissions Control Valve - W/R- Controls the evaporative emissions frequency valve - N80 - to cycle evaporated fuel vapours back in to the engine (NOTE: Bentley shows this as T55/3 on page X57 - presumably in error) VAG143 has it as N80.

6/55-Connection to A/C Control Head -E87- G/Y - Used to shut off A/C for up to 12 seconds when throttle is opened rapidly at speeds under 7 kph and shut off A/C for up to 3 seconds when in first gear and throttle position is at 65 degrees or more (full load) Ref: VAG143.

7/55-Input from G70 Mass Air Flow (MAF) Sensor - G/W - the MAF allows the ECU to know how much air (by mass) is heading to the cylinders so it can adjust the fuel, boost and timing to suit the conditions

8/55- Input from G40 Cam Position Hall Effects Sender - GY/R - signal wire - Note lack of signal = Blink code 2113 and the engine will not start. J17 fuel pump relay is not triggered.

9/55 - Input from F96 Barometric pressure/altitude sensor - GY/BK - provides a signal to the ECU to help control boost at higher altitudes - between 1000 and 4000 meters - prevents the turbo from spinning over 155000 rpm.

10/55- One of the Grounds for the ECU -BR/R

11/55 -Input from G61 Knock Sensor No. 1 = G/G - for cylinders No. 1, 2 and 3

12/55- Power Supply (+5V) out to Hall sender - G40; G69 Throttle Potentiomenter and Altitude Sensor (F96) - R/R -

13/55- Output to Data Link connector "L" for diagnostics - W/R

14/55-Ground for Fuel Injectors (N30-83)- BR/W - ground on intake manifold

15/55-Not Used

16/55 - Output control signal to Fuel Injector No. 5 - N83 - W/BL

17/55- Output control signal to Fuel Injector No. 2 - N31 - W/BR

18/55- Constant power supply to ECU J220 - R/R- from power terminal 30 (+12V) Fuse S26 (5A) - passenger footwell as shown HERE, in this above ECU fuse panel call-out post). This constant power also feeds the Holding Relay for its work during start-up and shut-down.

19/55- Ground from the ECU for various ECU controlled devices - BR/R - to intake manifold

20/55 - Output to Power Output Stage - N127 - BK/Y - for Coil No. 4 (Note - some early versions of the Bentley have this as Coil No. 5 - but this is wrong, it is 4 - check it yourself) - VAG143 has it correct.(N127 connector Pin 4/4)

21/55 - Output to Power Output Stage - N127 - BK/W - for Coil No. 5 (Note - some early versions of the Bentley have this as Coil No. 4 - but this is wrong, it is 5 - check it yourself)- VAG143 has it correct. (N127 connector Pin 3/4)

22/55 - Data Link Connector - W/BL - linked to Check engine light (Malfunction indicator lamp) - also used in the blink code check.

23/55 - Output to Power Output Stage - N122- BK/GY signal for Cyl #3 Ignition coil (N122 connector Pin 1/4)

24/55- Power Ground for "actuators" other than injectors - Not found in Bentley, presume BR/R, ground to intake manifold

25/55- Mass Air Flow (MAF) Sensor (aka - hot-wire air volume meter) - G70 - G/V- Burn off signal from ECU - every time the engine is switched off, the hot wire is heated to 1000 deg C for one second to keep it clean

26/55- G70 MAF - R/BK- "Reference voltage, earth (ground) in"

27/55- Switched Power to ECU from power (+12V) - BK/G - from Terminal 15 under the knee bolster - 15A circuit breaker, BK in BK/G out - S64

28/55- Input from G39 Heated Oxygen (O2) Sensor - G/G- This is the single black wire coming out of the O2 sensor to a single spade connector in the harness at the connector rack. The two white O2 wires are for the heater and are not run through the ECU.

29/55-Input from G66 Knock Sensor No. 2 - W/W- for cylinders No. 4 and 5

30/55- Ground for ECU and ECU sensors - G/BK (See details with a listing of the seven devices grounded through Pin T55/30)

31/55- Fuel consumption signal for trip computer - BL/BK - Note: only used in N.America on 92 spec cars (But still available at Connector Stn.2 )

32/55-Output to Trip Computer Boost Pressure Gauge - Y/BL - Note: only used in N.America on 92 spec cars (But still available at Connector Stn.2 )


33/55 - Ground for N75 Waste Gate Frequency Valve - - Y/R - also known as the charge pressure control actuating valve - lets the ECU control the boost - by dumping excess boost through the waste gate

34/55 - Output control signal to Fuel Injector No. 3 - N32 - Y/BL

35/55 - Output control signal to Fuel Injector No. 4 - N33 - Y/G

36/55 - Output control signal to Fuel Injector No. 1 - N30 - W/V

37/55-Switched +12V for all 5 Fuel injectors (N30-N83) and MAF (G70)- BK/R - Provides ignition-on power to injectors and MAF during starting conditions and then power to the MAF for the hot-wire burn-off after the ignition is turned off all via a "Holding Relay" in the ECU. (Main power to the injectors and MAF comes through the J17 FP relay via pin 87A and the S72 thermofuse after the engine is started).

38/55-T6ag Coding plug -Pin 1-GY/W

39/55-T6ag Coding plug- Pin 2- GY/Y

40/55-OUTput from G28 Engine Speed Sensor - V/BK to T6a/1, a green connector in Connector Station 2 in the passenger side kick panel where it changes to a green/blue wire that goes to T26/22 of the instrument cluster and then on to the G5 Tachometer. Also connected to Ch.27 in the A/C head (you can read out RPM in the A/C head) Link to Climate Control Diagnostics

41/55-Signal from A/C control module -W/W - signal used by ECU to increase idle speed through ISV control when A/C compressor is activated (actually just maintains the idle speed when the extra load from A/C compressor is added to the system during idle)

42/55 - (brown/green)- Gear selection input,e.g. P or N, - Automatic only - if an Automatic ECU is used in a manual trans application this wire needs to be grounded out to gives a 0 in the 4th position in VAG-com measuring block 005. It's default without being grounded is 1 = no start. (Thanks to "MG" on the S2forum for this info)

43/55 - Not used (*might* be Autotrans related??)

44/55 - Input from G42 Intake Air Temperature (IAT) Sensor - BR/BL - the ECU uses this signal to dial back timing (and power) to prevent pinging if the intake air temp is too high

45/55 - Input from G62 Engine Coolant Temperature Sensor - GY/BR - the one at the back of the head that the AAN ECU uses to figure out if the A/F should be enriched because the engine is cold.

46/55- Not used

47/55- Input from G4 Crankshaft Position Sensor - V/V - used by the ECU to control ignition and fuel injector timing

48/55- Combined ground through ECU for G4 crankshaft position sensor and the G28 engine speed sensor - R wire from G4 and BL wire from G28

49/55-Input from G28 Engine Speed sensor - GY/GY -allows the ECU to figure out the engine RPMs and make the required decisions

50/55- Road Speed signal input from the Instrument Cluster Speedometer -G21-W/BL-signal - also goes to Automatic Climate Control Head Channel 17 - which you can read out speed as well, the Servotronic Control Module, the cruise control module and the UrS4 lockable rear differential controller (under the rear seat so it can dis-engage the rear diff lock at 15 mph (25 kph)). More details about the white/blue wire and where its branches go is available HERE. More info about the G22 Vehicle Speed Sensor (VSS) 012409191D and G21 Speeodmeter . The ECU uses this road speed signal to know that the vehicle is moving so that when throttle position switch (Pin 52/55) is indicating closed but the vehicle is moving, the ECU can shut down the injectors to save fuel while coasting. Conversely, if the road speed is zero and throttle is closed, the ECU knows that this is the idle condition and it keeps the injectors active.

51/55- Not used for standard transmission cars - relates to kick-down shift point for automatic trans cars. Third digit in VAG-com measuring block 005. Normally "0" until kick-down with Autotrans when it goes to "1". (Thanks to "MG" on the S2 forum for this info)

52/55 - Signal from F60 Idle Switch -V/V- a microswitch inside the G69 throttle potentiometer that tells the ECU that the throttle is closed. With this signal and the Road speed signal on Pin 50/55, the ECU knows that the car is either idling at a stop or coasting throttle closed and decides how to handle the injectors accordingly.

53/55 - Input from G69 Throttle valve potentiometer - GY/GY the potentiometer on the throttle body that tells the ECU the degree to which the throttle body is open, which helps it compute "load".

54/55- Not used for standard transmission cars - relates to automatic trans cars

55/55- Output to Data Link connector "K" for diagnostics - G/R

Which should give me a massive help in checking.

I am wondering if a ground cable has been damaged when I have tightened it down onto the intake manifold.

I did not know how the holding relay worked so that is something else to check.