Good address for the main ECU repair

[ochten]

Who can repair my 2003 Tuscan ECU? Think someting is wrong inside.

[DVR V8]

ecutesting.com ? Autotronics.co.uk ? ecugenius.co.uk ? Actronics.co.uk ? the-ecu-doctor.co.uk ? .

Edited by DVR V8 on Monday 7th March 21:56

[NMNeil]

Why do you think the ECU has a fault?

[Granturadriver]

For review and repair of TVR specific parts these two specialistd are recommened:

http://pselectronicsolutions.co.uk/

http://www.pythonracing.co.uk/electrical/

Paul helped me with several issues (dash ecu, door ecu) in the past.

[Polly Grigora]

What do you think is wrong inside the ECU?

[ochten]

I had a EFI fault on display. Was TBS 2 according computer. Replaced the white TBS sensor and replaced the ground bolt nearby the Gearbox.

No result. On the 3 pin connector i have ground but the the yellow and orange wires are completely dead .According the wiring scheme the wires go directly to the ECU. TBS 1 is ok and Engine is running (with constant EFI fault)
Suggestions?

[ochten]

[ochten]

[Polly Grigora]

TPS 1 and TPS 2 White cables (yours could be discoloured or yellows) are used for 5 volts reference voltage

TPS 1 and TPS 2 use the same 5 volts reference voltage, reference voltage is from ECU Pin 48

TPS 1 is working ok and that tells us that the 5 volts reference voltage output from the ECU is good

TPS 2 should have a good 5 volts reference voltage because it links to the same cable that supplies TPS 1

Check wiring harness for damage


NOTE

You must be seeing 5 volts at TPS 1 before checking for its presence at TPS 2

Edited by Polly Grigora on Tuesday 8th March 08:56

[ochten]

yes i have app 5 volts on both wires on TBS 1. The computer takes the 14.5 value of TBS 1 to TBS 2. I can see that on the computer. But the lack of power on the white and orange wire of TBS 2 worries me. I can not see that the wiring harness is damaged

[Polly Grigora]

ochten said:

yes i have app 5 volts on both wires on TBS 1. The computer takes the 14.5 value of TBS 1 to TBS 2. I can see that on the computer. But the lack of power on the white and orange wire of TBS 2 worries me. I can not see that the wiring harness is damaged

You posted that there is nothing at white and orange TPS 2 cables

Appreciate that if English isn't your native language it can be difficult to explain things

I don't understand your above post, you mention 14.5 volts which doesn't make any sense

Measure for 5 volts at TPS 1 white cable

Now measure for 5 volts at TPS 2 white cable

If there is 5 volts present at TPS 1 and TPS 2 white cables, carry out the following test

Measure voltage at orange TPS 1 cable

Measure voltage at orange TPS 2 cable

The above voltages should be similar

Now measure the same orange cable inputs at the ECU with it connected

TPS 1 orange cable at ECU Pin 35

TPS 2 orange cable at ECU Pin 18

The voltages measured at the above ECU pins should be similar to the voltages measured at the TPS 1 and TPS 2 plugs

Edited by Polly Grigora on Tuesday 8th March 09:37

[ochten]

seems to be that the MBE ECU is a non TVR developed product. Is a MBE dealer experienced with the Speed Six ECU?

[Polly Grigora]

TPS 1 and TPS 2 Reference voltages of 5 volts come from one cable in the engine wiring harness

[ochten]

yes, i have to check the Wiring. Broken wire somewere perhaps.

Thanks for the help!

[Polly Grigora]

Ok then, post back if unsure of anything

[ochten]

Question, does somebody has a overview of the main and smaller round bulkconnector to start the white wire feed there? Is the white TBS1 wire running direct to TBS2? Or does it take another Route in the Wiringloom?

[ochten]

I see 4 orange wires and 2 white wires coming out. Which one is for TBS1 and 2 ? all

[Polly Grigora]

Here's the information

[ochten]

Opened the wireloom nearby the Bulkhead. The 3 wires of TBS 2 go direct to the smaller Connector (Red and White) The black one (ground) goes to the other loom. Both ends are dead. No broken wire. It is the Powersupply from the ECU?

[Polly Grigora]

Sorry, Tuscan diagram didn't show that other smaller plug

Now found smaller plug in a different TVR Model diagram and am looking hard right now

Give me some time, will be back