Td5 Auto lock up and resetting adaptive values

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On the way back, however, and solenoid 3 went to ON when correct speed was met but lockup didn't occur.

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This was the problem i had, the message went through to solenoid 3 but lockup was intermittent, sometimes worked & sometimes not.
I paid to have the solenoid itself replaced, but made no difference, wasted more money.
Forked out more money to another transmission mob who claimed they could tell me the exact problem, all they did was hook it up to their own diagnostic to tell me what I already knew, lockup intermittent.
They only got half of what he wanted to charge me & that was still to much.
The next problem I faced was the Cause, Told it could be the TC itself, could be the pump seal, auto on the way out, not holding pressure.
It was doing my head in, who can i trust with this problem without ripping me off, a full reco costing thousands.....
In the end through a few ph calls & talking to face to face, i grew confidant with the fella who done the repair, At 270,000 kms I was sure the auto had been out as it was nice & clean along with the transfer case, but the previous owner had no background info, he hadn't had it long & his missus hated it so he had to sell.
Anyhow the auto come out & checked, yes it had been reco'ed at a reputable ZF trans plce in Melbourne & all looked well, however it had the cheapest & nastiest TC fitted, so i was told.
So in the end a new H-Duty TC & pump Seal & all is well.
It does look as though you should try to get rid of the fault codes first as you have a strong/reputable TC already in.

It does sound like I'm just delaying the inevitable, doesn't it.....but this engine temp reading is the last thing before I have the TC inspected/replaced with the original. When we say the TC though, we are referring to the lockup clutch specifically, right? I mean, what else can go wrong with a TC. They're near solid steel.

Because I love my heart rate racing, I put on the original ecu code. This made no difference to the lockup (went back to the beach). I have to say, how anyone can drive a Td5 in standard form is beyond me......just terrible......slow to respond, no power to get up hills. A dull drive. But back to it....

I have to find out where the gearbox ecu reads it's temps from and how it does it.

Cheers for all your help so far.......for you it does sound like a case of 'yeah, been there, done that'.....:-)

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When we say the TC though, we are referring to the lockup clutch specifically, right? I mean, what else can go wrong with a TC. They're near solid steel.

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Yes the lockup is inside/part of the TC

Ok just put back the performance ecu map........ahhh that's better.

I tell ya, if I find I don't have to replace the TC I may treat myself to a VNT with updated map.....

Ok just emailed Ashcroft's. But I think I will have to replace my gearbox ecu....

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Originally Posted by catch-22

I have to find out where the gearbox ecu reads it's temps from and how it does it.

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It's no mystery. The only place the gearbox ECU gets it's temperature information from is the engine ECU. The information is sent via canbus.

If the engine doesn't send a sane engine temp the gearbox ecu should set a P1884 T_MOT fault code, which will in turn cause the engine ECU to set a fault that the gearbox is reporting a fault code.

If you have a dodgy coolant temp sensor or related wiring it on the engine it will cause problems with the gearbox.

cheers
Paul

Thanks Paul. Your knowledge in this area is amazing.

So engine temps read by the engine ecu 'seem' ok and normal. And the are no faults being logged on either ecu (now).

So can temp being sent to the gearbox ecu still be wrong? Can it still be the temp sensor?

Cheers
Caine

Caine,

When solenoid 3 goes active, try lifting off throttle quickly and then back on..

When the TC lock up went on mine I had the identical symptoms, which were amplified by fitment of the VNT (more torque through the unit).

I went with the Ashcroft updated TC (lower stall and larger) and never regretted it!

Hi Mike,

Thanks for chiming in. I'll go for a drive now and test what you suggest.

I do have the Heavy Duty TC from Ashcroft - the bigger one that, yeah, lowers stall. They may be different now. I ordered mine back in August 2011. I noticed that the price has dropped quite a bit :(

This should have lasted a lot longer than what it has (if indeed it does turn out to be the TC). I mean the standard one was doing all the towing and it didn't have an issue at all.

Cheers

Disconnected the coolant temp sensor wire then looked at the nanocom. Firstly, dash temp gauge red LED is displayed. Normal. I've read that the ECU will take it's temps from the fuel temp when it detects the coolant temp sensor is faulty.

In any case, the gearbox engine temp remained just under half as it has. Real engine temp was reading 32 and the gearbox engine temp was reading 15.

Given the temp to the gearbox ECU reads from the engine ECU I can't see how the temp sensor has anything to do with this.

I'm going to try cleaning the contacts on the GB ECU and check as much of the cable as I can.

I'm with RoverV8 - this is doing my head in....