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Aygo Ecu ground location ?


Markie1881
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just check the filter and the resistance of the ocv

have you tried starting the car on easy start ???

you have a spark so it is neither the crank nor the cam sensor

 

remove the Aux Belt and see if it starts if it does do not run it for too long

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16 minutes ago, flash22 said:

just check the filter and the resistance of the ocv

have you tried starting the car on easy start ???

you have a spark so it is neither the crank nor the cam sensor

 

remove the Aux Belt and see if it starts if it does do not run it for too long

OK I'll check the filter if it comes out and the resistance of the valve, do I just spray easy start down the throttle body while someone cranks it do I give it throttle at the same time and what am I looking out for if it starts when aux belt is off. 

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easy start - crank it over, spray it, it may help if the throttle is pressed but not needed

Aux belt - that will rule out any issues with the water pump, AC or alternator

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1 minute ago, flash22 said:

easy start - crank it over, spray it, it may help if the throttle is pressed but not needed

Aux belt - that will rule out any issues with the water pump, AC or alternator

Cheers I'll give that a try tomorrow. 

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13 hours ago, Frankla said:

Cheers I'll give that a try tomorrow. 

Does the OCV filter come out in one piece 

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OCV looks to be OK according to my reading is it still worth taking the filter out 

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6 minutes ago, Frankla said:

OCV looks to be OK according to my reading is it still worth taking the filter out 

 

PXL_20240607_082744231.jpg

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Managed to get the this off are the filters stuck inside 

PXL_20240607_085108043.jpg

PXL_20240607_084826115.jpg

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18 hours ago, flash22 said:

just check the filter and the resistance of the ocv

have you tried starting the car on easy start ???

you have a spark so it is neither the crank nor the cam sensor

 

remove the Aux Belt and see if it starts if it does do not run it for too long

I've got some carb cleaner can I use that if not I'll buy some easy start 

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I've checked OCV seems OK, easy start sprayed down throttle body the only thing I couldn't do was remove the OCV filter, the bolt come off no problem but didn't no how to get filter out, if that was clogged up would that affect car not starting. 

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what did the car do on easy start?

OCV filter, yes its down that hole use a pair of long nose pliers or a bit of rubber pipe

image.thumb.jpeg.d8a6c115266e0d8ee550ded675adb311.jpeg

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Easy start made no difference, had a mechanic out today and his diagnostic scanner and wouldn't communicate with the car it says ignition needs to be on he can't look a live data 

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20 minutes ago, Frankla said:

Easy start made no difference, had a mechanic out today and his diagnostic scanner and wouldn't communicate with the car it says ignition needs to be on he can't look a live data 

Ignition was on as well 

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well that is why you have no codes, first off check you have power to the OBD2 port

Pin 16 - 12v

Pin 4 - Chassis ground

2078274081_obd2tsgc.thumb.jpg.740165c3ea7b030c50e593f9be485bf6.jpg

ignore the TS marking

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just had a look back over this thread to recap

I believe the issue is the original ACC problem you had, put the key in the ignition and push up as you turn the key

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3 hours ago, flash22 said:

well that is why you have no codes, first off check you have power to the OBD2 port

Pin 16 - 12v

Pin 4 - Chassis ground

2078274081_obd2tsgc.thumb.jpg.740165c3ea7b030c50e593f9be485bf6.jpg

ignore the TS marking

It has power because my basic scanner powers up and the mechanic has better piece of kit it was the size of ipad with a cable plugged in the obd port, he said he's scanner should able to identify any ECU's and read the car's vin number but there's nothing coming up on the scanner apart from the car's voltage 

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6 hours ago, flash22 said:

just had a look back over this thread to recap

I believe the issue is the original ACC problem you had, put the key in the ignition and push up as you turn the key

That was sorted it was fuse number 11 15amp at the left side of the speedo that's been checked and is all good I've also tried putting the key and push it up as I turn the key 

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if the acc 12v is dropping during crank or not feeding the ECU it will cause the ECU not to turn on properly

unless you have something pulling down the network like faulty ABS or EPS

checking all the fuses may not be a bad idea making sure the sockets are tight and clean and unplugging and replugging the wiring to the back of the cluster

have you tried to get the ecu to flash any codes out by linking pins 4 and 13 of the obd2 port

 

 

 

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The 12v supply is OK on the acc and ig when cranking I've also had pin 4 and 13 linked for 35 minutes, I'll take cluster out and check connections and fuses, thanks for the advice Bob. 

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4 and 13 should flash back any codes, link it turn the ignition on you will get 1 long flash then count the flashes it will give you the first digit then pause and flash the 2nd digit it will carry on if other codes are stored or just repeat the first 2 digit code

 

i think you need to pin down the reason you can't talk to the ecu

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OK thanks I'll give that ago, what flashes? Yeah have to see why the scanners can't talk to the ecu think the mechanic is going to speak to someone at Toyota who he knows 

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You've been very helpful Bob, I'll let you know how I get on 

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you can try pulling the eps and/or the abs fuses and see if that makes any difference

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