Yarris cdx 00' buggered a few issues, please help

[daveg7]

Firstly thanks for the Help CTScott
When I disconnected the ECU and turned the engine the fuse did not blow and the centeral locking system from the key fob works ok.
Does this surgest that the receiver, amplifer and body ECU are ok?
And would i be able to reprogram the new ECU to the keys using the manual key reprograming method that is used to add new keys? I have no clue what a toyota service tool is.

[CTScott]

Originally Posted by daveg7

Firstly thanks for the Help CTScott
When I disconnected the ECU and turned the engine the fuse did not blow and the centeral locking system from the key fob works ok.
Does this surgest that the receiver, amplifer and body ECU are ok?
And would i be able to reprogram the new ECU to the keys using the manual key reprograming method that is used to add new keys? I have no clue what a toyota service tool is.

That is actually a good sign. Without the ECM being alive you can't tell yet if the key amplifier is OK, but hopefully with the others being OK it is as well.

For programming the keys, I am not sure about the 1st gen Yaris, but with the 2nd gen, to program new keys, without having an original "master key", a special piece of Toyota service equipment is required, so you would have to get the car to the dealer to have it reprogrammed (and of course it won't actually start until you do so).

Since the ECM is definitely bad, take it out, remove its cover, and lets see if there is visible damage. Sometimes there is a sacrificial component that will pop with reverse polarity and simply replacing that one component will bring the device back to life.

[daveg7]

thanks i will try and take it off tomorrow when it light and have a good look.

[daveg7]

Hi I have taken the ECU off and opened it up, and can see no apparent damage at all. what does this mean?

[CTScott]

Originally Posted by daveg7

Hi I have taken the ECU off and opened it up, and can see no apparent damage at all. what does this mean?

It could be that what was damaged did not catastrophically fail. Can you snap some pictures of the inside?

[daveg7]

Originally Posted by CTScott

It could be that what was damaged did not catastrophically fail. Can you snap some pictures of the inside?

if you need any close-up's of different areas just say.
If the ECU is ok could it be the connection cable?