[marks152]

Bcm is pin 8. Instruments is pin 12. The Corsa c doesn't run a canbus system. Canbus is pin 1 low speed, pin 3/11 mid and 6/14 high from memory.

 

[marks152]

Could be a faulty interface. You won't be able to connect to instruments unless your firmware and software match. For example 100219a has fw139. 120309 has fw145 etc

 

[marks152]

See if you can connect to airbag module. This uses pin 8. Also see if you can connect to TID display assuming you have a TID. This is pin 12. This will rule interface fault out.

 

[jimmycheesebob]

Hi marks152 & corsa c crew,
Happy new year to you all.

The holiday has given us a small amount of time to look at this horrible problem again. We don’t want to give up but feel we will have to soon.

We stripped out the bcm, dash and centre console around the easytronic gearstick. Incidentally the handbrake lever had to come out to facilitate this contrary to what the Haynes manual suggests. We then checked everything we could for broken wires etc but were unable to find any problems visible. I tightened up all ground points and then installed the instrument panel and bcm again.
I have checked the vauxcom and interface and indeed we have 120309 with fw145 and this works reliably on pin 7. When trying to communicate with the bcm,airbag,and instrument we have no comms, but immobiliser does work but I think this is pin 7. So basically as you said marky152 pin 8 and 12 for the instrument are not working. If the bcm was faulty I would still expect pin 12 to the instrument to work.
Could this still be our interface ? As I can’t see any other problems

Thanks again for your help

 

[marks152]

Looks like interface issue to me. It's not uncommon.

 

[jimmycheesebob]

Hi guys, yea marks152 was right

I continuity tested the wires from the diag port to the end points (pin8 bcm) (pin12 instrument panel) and everything was fine. Also checked for breakdown to ground.
New diagnostic interface has just arrived and....hey presto comes are now working again. However the touch point adaption is still not working
Errors with sequence error. Bah

 

[marks152]

What firmwares on it.

 

[jimmycheesebob]

Hi guys, yea marks152 was right

I continuity tested the wires from the diag port to the end points (pin8 bcm) (pin12 instrument panel) and everything was fine. Also checked for breakdown to ground.
New diagnostic interface has just arrived and....hey presto comes are now working again. However the touch point adaption is still not working
Errors with sequence error. Bah

 

[jimmycheesebob]

Ok just got in after another unsuccessful attempt at learning the gb parameters. All other units seem to be working but the easytronic transmission will not program.
I jacked the car up and set vauxcomm Woking with learn gb parameters as this is the only real error code now being shown on the car- the car was jacked up and in neutral both front wheels turn ok ie. not stuck in gear.
I run the gearbox learning and it seems to start ok.. it steps through to “programming base position enabling programming mode #02 ok ! “ then it fails with “timed out 0x17”

Anyone any ideas ?

 

[marks152]

No idea on this one. Ive never had any issues in the past. Does your firmware and software match

 

[jimmycheesebob]

Thatnks marks152, yea I checked few and saw versions and all is ok on vauxcom now. this problem is really killing me it strikes me that easytronic is not supported well by Bosc /Vauxhall.
Points I need to share
The car is communicating well throughout but the touch point fails....am I wasting my time with learning gb parameters of the touch point fails? To me you should still be able to learn gb. Even if touch point is not done because it just involves calibration of the select and shift motors.
Secondly vauxcom is not seeing a vin on the tcu? I’m sure it used to although it was not a vin but a serial number. If this is missing am I wasting my time ?

 

[marks152]

Maybe the easytronic module is defective.. Maybe its seeing something out of spec such as a worn clutch.

 

[jimmycheesebob]

Yes agree marks 152, that was my thinking. I guess the key question is if the clutch is worn or the bleed is poor then would that really stop the gb learning. To my mind as the clutch manual release screw does not twist during gb learn procedure before the timeout then the clutch is not used ? But who knows? When running touch point and bleed process the clutch screw moves fine and the distance of the plate changes fine albeit showing a worn clutch 18mm

Does any body have experience of this. The only fault code on the entire car is that the tcu is missing it’s parameters there is no reference to the clutch.

Cheers for now

 

[jimmycheesebob]

Hi guys, so a little update on the car…

We sent the TCU off to ECU-testing (www.ecutesting.com). They confirmed that there was indeed an issue with the software on the unit. They sent back the unit, and we refitted and bled the clutch. Great – it fixed the P1735. The car now displays “N” on the dashboard.

Of course, this being an Easytronic, we aren’t off the hook yet……

Although the car states that it is in “N”, the car will not turn over. We had the code P1728 (Shift Motor Mechanic) present, however after clearing this code it only returns occasional upon switching the ignition on. Having continuity checked the wiring loom from the TCU to the shift/select motor actuator and finding this to be fine, we then sent ECU-testing the shift/select motor to be tested. We expected there to be worn brushes or a bad feedback to the TCU causing the fault. However, ECU-testing confirmed no issues with the shift/select motor actuator. They have suggested that perhaps an external problem (ie: external to the Easytronic system) may be the problem, such as a mechanical problem with the gearbox. As the car has not moved in three years, and was running fine mechanically before it went into “hibernation”, I find this hard to believe. Perhaps the gearbox is stuck?

Also worth mentioning is that we have successfully bump started the car. The engine runs, but it still doesn’t select gears, and won’t rev past about 1,300rpm.

Does anyone have any ideas as to how to remedy this issue?

 

[marks152]

What codes do you have in the engine control unit, bcm, immobiliser, easy tronic unit.

 

[enderbyeddie]

Hi my name Is Eddie. I did a couple of articles back in 2015 relating to Easytronic cars. One was called easytronic problem to a fix.

The reason for me crashing this thread is that I have the same problem with a 2001 corsa c 1.2 easytronic. It will not learn the gears. I have had all the same idea's as you have tried, and a couple others which I will tell you about.

The op-com when I go in to values shows the shift motor as -10.68 mm actual where 0.00 mm is requested. The select motor is good. 0.00 mm 0.00 mm. This is with a replacement actuator as the original had one blown motor. So I have now tried 3 actuators, known to be working, and they all end up the same, about -10.68 mm which is a big difference. Then I decided to possible destroy an actuator by removing the motors. Firstly I put the motor in, them turned on the key so it would do the usual self test, went to op-com values, yes -10.68 mm, then without switching anything off, removed the motor and moved it by hand to register 0.08 mm as close as I could get it to 0.00 mm. Then I tried to learn the gears, exactly the same as before. It ended timed out and -10.68 mm. So my thinking is now, that either there is something physical in the gearbox which is doing this, or what is more likely that the clutch actuator needs new software, or a new board. Tech 2 could flash new software update, but op-com can not. I do not have access to Tech 2 so I am thinking of removing my clutch actuator and having that tested. Another option would be to get an auto electrician with tech 2 to help, but my previous experience with the "experts" (previous Astra article I did) makes me stop and think if i might just make the problem worse. I think i will chew on this before I remove the clutch actuator, as this seems to be working just fine, when I test the actual clutch position etc. I have used easytronics, ac tronic, and ecu testing before and they have all done good jobs, so I am leaning to having the actuator tested and re-flashed with an updates, as it seems to be running on original software, never updated. When I crack this problem, I will post the solution. Regards Eddie

 

[jimmycheesebob]

Hi marks152, no, no other codes stored in any of the other modules.

Hi Eddie, thanks for joining. We know who you are. Your post on Easytronic: problem to a fix was by far and away the most useful post we have come across.

One thing that ECU-testing informed us after fixing my TCU was that my particular model of Easytronic Corsa is unable to be reprogrammed – with Tech2 or opcom. I would send you a picture of the info sheet they sent, but I’m not paying for a fancy account lol! So I’ll just type it out instead:



“Vauxhall Easytronic Clutch Actuator

The fault with this clutch actuator has been caused by an attempt to perform the following ‘F4: Additional Function’ then ‘F1: Learn Gearbox Parameters’ using ‘Tech2’ diagnostic equipment.

There are additional faults on the vehicle that prevented ‘F1: Learn Gearbox Parameters’ from being effective and subsequently damaged the internal ECU Software/Processor. (This is a design flaw with the logic of this particular unit and not the fault of the Vauxhall technician that attempted to perform it).

The additional faults on this car MUST be rectified first before the ‘F-light’ will extinguish from the instrument panel to allow the engine start function.

The clutch actuator also controls the hydraulic clutch operation, upon installation the clutch hydraulics will need to be bled diagnostically via ‘Tech2’ diagnostic equipment or using a conventional pressure bleed system. If this is not performed correctly the gearbox will not depress the clutch correctly.

!!WARNING!!
If using ‘Tech2’ diagnostic equipment – DO NOT attempt to select the following option: ‘F1: Learn Gearbox Parameters’.

If you select this option then this clutch actuator will have the following permanent fault code stored: ‘P1735 – Gearbox Parameters Not Learned’ the F-light will display on the instrument panel and the engine will fail to start.

In the event that these instructions are ignored and the above does occur, then the clutch actuator will need to be sent back to us to be reconfigured – this would be charged for.”



My dad spoke to them on the phone and asked why our Easytronic gearbox could not be programmed. I think he said that ECU-testing said that it was because the Easytronic system self-learnt or was pre-programmed or something, but I will have to confirm that with him.

Hope this helps.

 

[enderbyeddie]

So it seems that they say that the software on some of the clutch actuators can not be updated. Seems weird to me. How old is your clutch Actuator? So they are assuming there are other faults on the car, but you said you had gone through every other system, maybe do that again.

Has any one been near your car with tech 2?

One question for ecu-testing would be, "are they saying skip the learn gearbox parameters"? treat it like a plug and play? if so what things do they say you have to do, obviously bleed the clutch, and what else? their answer there would be a great help. Also if plug and play, why the fault code gearbox parameters not learnt???

As far as a problem with the gearbox itself, my car has not been off the road for any length of time, it worked fine right up until the dreaded "F" appeared, its on an axle stand, and is not stuck in any way, the selector tabs are 3 zero 3 and the reverse rod grove/inset is on the top of the rod, and as far over to the right as it can go, when seen from in front of the car.

 

[enderbyeddie]

Hi Jimmycheesebob I just had a brainwave. What if your clutch actuator and the one on my car are from the same batch? The batch that ECU-testing say you must not try a program it to learn the gear positions? It would mean that we both shot ourselves in the foot, so to speak, by using op-com to program the units. What do you think?

To try and prove this theory I list here the numbers that my op-com found when talking to the clutch actuator. Part number 09126186 Production date 20010702 Alpha code AA . How do your unit's numbers compare? May I ask you to list your numbers on here please? If they are the same or similar, it would lean me towards sending my clutch actuator away for work to ECU-testing.

Also just to recap, the only fault I have showing on the transmission is P1735-(0) Gearbox parameters not learned-Present. The only other code on the entire car is in the body control module, fault B3078-(0) Power sounder malfunction-present. Which 99 out of 100 means the rechargeable back up batteries on the alarm siren need replacing. I know this fault can make the alarm system try and re-set over and over again, so I must deal with this, but has anyone experience in it affecting the Easytronic system? My own gut feeling is no, as when you are using or programming the Easytronic's the ignition key is always in the "on" position, over-riding the alarm, but I will research this further. Any one with any thoughts on this, please let us know, thanks.

Well that is about all I have to say for the moment, you all take care. Eddie

 

[marks152]

I wonder if it's possible to use a used module. Not sure if the easytronic module has the security code in it. I dont seem to recall it having it on the astra h. It would have the vin stored but this shouldn't cause much of a issue.