Engine fault code

Geodark

spacey2012 wrote: »

Have you tried the Pug software or are you using a generic OBDii software.
I find it strange your free/ e-bay software is reporting a DTC and the cars own DTC is not.
Why would you trust your software and begin tracing a non fault, is it some kind of college project ?
You can not retrofit the required sensor as well as that engine has no place for it to be fitted.
It is omitted on that car.

have to agree with this, although 2001 was the year when new cars had to be eobd, if the car was made before that they might not be fully eobd. I have a 2002 zafira, which was made prior to that - and I have to use vx software and diagnostic to get true readings out of it. Elm type readers won't work with it. Could it be your pug isnt eobd and as a result is giving a false dtc?

laughingboy

tedted wrote: »

of course it has a ect,wire no 1235 goes from the sensor to the ecu,pin no 25.pin no 26 on the ecu is the feed for it but it also feeds the tp sensor and the iat sensor,this wire no is 1336 to the sensor

thanks, yep wires 1235 (white) and 1336 (green) go to the sensor i believe to be the coolant temp sensor.

The white wire has 5V on it (expected) but shorting the wires had no effect on the temp reading.

i presumed the green wire would just go to ground but it didn't seem to be when i tried buzzing it through which is prob why shorting the wires had no effect. So im working on the assumption i have a bad ground for whatever reason

spacey2012 wrote: »

Have you tried the Pug software or are you using a generic OBDii software.
I find it strange your free/ e-bay software is reporting a DTC and the cars own DTC is not.
Why would you trust your software and begin tracing a non fault, is it some kind of college project ?
You can not retrofit the required sensor as well as that engine has no place for it to be fitted.
It is omitted on that car.

its a generic OBDII bluetooth reader using a free android app (torque).

its not a project i was just interested after noting the strange temp reading, but something is not adding up, if the sensor is reading -40 degrees i can probably doubt the fan will come on when it needs to!

Geodark wrote: »

have to agree with this, although 2001 was the year when new cars had to be eobd, if the car was made before that they might not be fully eobd. I have a 2002 zafira, which was made prior to that - and I have to use vx software and diagnostic to get true readings out of it. Elm type readers won't work with it. Could it be your pug isnt eobd and as a result is giving a false dtc?

yes it was just on the cusp of the intoduction of mandatory introduction, however speed, rpm sensors etc all work using the reader/app combo so i have no reason to doubt any of the others

tedted

with the reading that you have i would check for a broken wire or possibly dirty connection

Strider590

tedted wrote: »

with the reading that you have i would check for a broken wire or possibly dirty connection

^^ This

It's a Pug, they're legendary for electrical faults caused by the above.

laughingboy

thanks all, think i need to check the continuity of the wire from sensor to ECU...

but how do you remove the plugs from the ECU? (there are 3) are there any videos?

and for pins 25/26, which one of the plugs will this correspond to?

also, i have seen references that this warning code may not cause the dash warning light to be illuminated, which may explain why mine isn't on!

thanks

laughingboy

bump, anyone know how to disconnect the ECU plugs?

is it even ok to disconnect them? im thinking immobiliser etc?

a pic of the ecu and plugs can be found at the following link (just select the pic of the engine bay)

http://www.silverlake.co.uk/breakers/details/peugeot+106+independence/24623/

(it may well be obvious but i don't want to make things worse!)

thanks

forgotmyname

Unplug the ECU??

Place a dummy resistance value on the sensor you need to test and use the diagnostic port to monitor its condition.

laughingboy

forgotmyname wrote: »

Unplug the ECU??

Place a dummy resistance value on the sensor you need to test and use the diagnostic port to monitor its condition.

thanks, the reason for disconnecting is to check continuity of a wire from sensor to ECU

forgotmyname

Changing the sensor value will soon tell you that without messing with the ECU.

laughingboy

i've tried a dummy load on the sensor which didn't work so i suspect a problem with a wire or connection (it may not be but that's what i've got to go on at the moment)

hence why i want to check the wire is ok from sensor to ECU! which will mean unplugging one of the wiring looms to the ECU to get at the other end of the wire...

thanks