Toyota Aygo 2009 not starting

**Mjolinor** · 3rd September, 2023, 07:54 AM

Did that already with the fuel pump. All good. fuel pressure, crank output and check wires to ECU next.

Cam sensor when I find the bloody thing. I am going to have to start removing some of the dozens of square yards of plastic.

**Mjolinor** · 4th September, 2023, 02:33 PM

Checking the wires and they do not seem to be where the Internet says they are.

As far as I can make out from this crappy picture the crank sensor is pins 27 and 8 of the larger ECU plug.

I am getting continuity to pins 5 and 6

Is anyone able to elucidate or give me a more correct pinouts for the ECU.

**Mjolinor** · 4th September, 2023, 02:58 PM

Crank output. Looks perfect to me.

**clusters** · 4th September, 2023, 03:08 PM

Signal looks pish

https://rotkee.com/en/wavebase/good-...2011?system=51

**Mjolinor** · 4th September, 2023, 03:51 PM

That's because I used a pish scope. The signal is good.

Just off in search of cam sensor now and I will stick a better scope on the pair together.

**Mjolinor** · 4th September, 2023, 04:44 PM

Found the cam sensor and it is perfect. Same as the picture.

No spark on it so thinking immobiliser now.

Using Delphi the immobiliiser seems fine but I believe that the OBD goes directly to the immobiliser but the talking to the ECU is via can. Seems to me maybe those wires perhaps.

**Mjolinor** · 5th September, 2023, 02:20 PM

Pic showing cam V crank timing.

Quality shite, too much sun.

My cam timing is one pulse earlier than Clusters picture. My crank sensor output is also slightly higher voltage.

Not sure if that is going to be a problem. My instinct says no as long as it is not varying the ECU should cope with it but there has to be something wrong.

Had a friend come round today with a Toyota specific set up but it just reports the same as Delphi, no problems.

Getting to thinking about ripping the ECU apart or sticking the car on ebay.

**MrDerv** · 5th September, 2023, 04:55 PM

Originally Posted by Mjolinor

Pic showing cam V crank timing.

Quality shite, too much sun.

My cam timing is one pulse earlier than Clusters picture. My crank sensor output is also slightly higher voltage.

Not sure if that is going to be a problem. My instinct says no as long as it is not varying the ECU should cope with it but there has to be something wrong.

Had a friend come round today with a Toyota specific set up but it just reports the same as Delphi, no problems.

Getting to thinking about ripping the ECU apart or sticking the car on ebay.

I refer you to my earlier posted video. You'll need to do some wire tracing. Immob issue for sure

**Mjolinor** · 5th September, 2023, 05:26 PM

Except that the immobilizer has no errors and the ECU has no errors. If I had a wiring problem between the two then the ECU would have a fault code related to the immobilizer as shown in that video.

**MrDerv** · 5th September, 2023, 09:39 PM

Originally Posted by Mjolinor

Except that the immobilizer has no errors and the ECU has no errors. If I had a wiring problem between the two then the ECU would have a fault code related to the immobilizer as shown in that video.

I'd still check the wiring associated in the video. Engine ECU might not be complaining about immobilizer, but something is stopping it from starting.

**clusters** · 6th September, 2023, 12:34 AM

The immobilizer will NEVER kill spark, it ALWAYS cuts fuel.

**Mjolinor** · 6th September, 2023, 08:16 AM

Originally Posted by clusters

The immobilizer will NEVER kill spark, it ALWAYS cuts fuel.

I confirmed yesterday there is no spark and no fuel injection happening which shirley would always point to the computer not knowing where the engine is, ie cam and crank sensors.

I am going to rip the ECU apart next to see if there is any damp in there. I have seen these refuse to start when the timing chain is worn but from my traces I am pretty sure the valve timing is within tolerance. The relationship between crank and cam is correct when compared to lots of pictures online like the one you posted. It seems that cam can be up to five pulses before the long tooth on the crank.

**Mjolinor** · 6th September, 2023, 08:18 AM

Also note that the wiring is not as the video shows. This is RHD so the steering wheel is on the other side to the one in the video and the wiring is totally different and I cannot find a wiring diagram and pin outs that seem correct.