Steve Heath ECU Reader

[Pacman1972]

Anyone got any experience with SH's ECU code reader?

I've plugged in the unit as per the instructions and switched on the ignition as per the instructions, but I'm not getting any code readings - Simply a red dot in the bottom corner.



I did clear the existing ecu codes before attaching the reader and then went for a 4 mile spin. But still no codes. Maybe I need to give the ecu more time to report any problems or maybe I have a squeeky clean system?

[paulathome]

Dont want to state the obvious but if your car is running ok then you may not have any faults to report. So job done, now go for a blast.
Paul.

[Mr MoJo]

The 14cux doesn't store codes once it has been reset. You need to use the code reader before disconnecting / re setting it to get the fault codes to read.

[v8s4me]

As Paul says, if there's nothing showing it means there are no faults.

[Alexdaredevilz]

Disconnect something to test it

[Ozstyle]

I fitted one, first off it did not work, no surprise as I found that although I had the 4 pin black square plug in the loom it was not wired to the ECU 40 pin plug, maybe this was a TVR oddity. SH offers wiring instructions and pins to enable the connection to the ECU plug if you don't have the black 4 pin square plug in your existing loom. I wired up the plug to the ECU 40 pin connector and all works, easy to check just remove the ECU coolant temp sender connector turn on ignition and gives a code 14. I have found that I need to disconnect the battery or ECU connector to clear the code, I can't clear the code with the reader but apprently some codes can only be cleared this way. I would check that you do have the reader connectors fitted to the correct pins in the 4 pin plug, if they are disassemble ECU 40 pin plug and check you have connections for the code reader. I do remember that the original SH instructions had an error around the wire colours and pin connections that was corrected as soon as realised.

[Pacman1972]

Ozstyle said:

I fitted one, first off it did not work, no surprise as I found that although I had the 4 pin black square plug in the loom it was not wired to the ECU 40 pin plug, maybe this was a TVR oddity. SH offers wiring instructions and pins to enable the connection to the ECU plug if you don't have the black 4 pin square plug in your existing loom. I wired up the plug to the ECU 40 pin connector and all works, easy to check just remove the ECU coolant temp sender connector turn on ignition and gives a code 14. I have found that I need to disconnect the battery or ECU connector to clear the code, I can't clear the code with the reader but apprently some codes can only be cleared this way. I would check that you do have the reader connectors fitted to the correct pins in the 4 pin plug, if they are disassemble ECU 40 pin plug and check you have connections for the code reader. I do remember that the original SH instructions had an error around the wire colours and pin connections that was corrected as soon as realised.

Thanks for the tips, I do have the black square plug which appears to be wired to the ecu. I'll try your test - Where can I find the ECU coolant temp sender?

[Alexdaredevilz]

At the front of the inlet manifold, off side, behind the dizzy

[PRTVR]

A few pictures of the temperature sender unit.







The second picture has the connection to it removed, the connection is held in place with a wire type clip .

[scotty_d]

As per the OEM range rover one i had if the battery or ECU is disconnected you should get code 02 IIRC the first time you put the ignition back on this way you know its working.

[Pacman1972]

PRTVR said:

A few pictures of the temperature sender unit.
The second picture has the connection to it removed, the connection is held in place with a wire type clip .

Thanks for the pics - found it and disconnected but still no codes, so I guess it must be somewhere in the wiring.

[Pacman1972]

Pacman1972 said:

Thanks for the pics - found it and disconnected but still no codes, so I guess it must be somewhere in the wiring.

Spoke to Steve Heath this morning and on his advice took 12v from the lighter socket which worked and started giving me codes. So the unit is working fine Think I'll wait for a rainy day before tracing why my black plug wasnt getting 12v's

[Ozstyle]

that's odd because in your original post you had the red indicator dot illuminated which would indicate power to the unit

[Pacman1972]

Ozstyle said:

that's odd because in your original post you had the red indicator dot illuminated which would indicate power to the unit

Yeah that threw me as well and is still the case. The only thing I can think is that the 12v on the cable is interrupted when the ignition is switched which would cause the reader to be briefly down when the ecu spits out the code. Something I'll investigate further on a rainy day.