Year of Manufacture *: 2000
( Optional ) Engine Code or CC: 1.6 Zetac
I realise that this subject has been hassed over before and I appolgise now for rehashing it!
I have come across these charging problems before, and with the previous posts and the info on teh Pico website I havent had any problems. However, this one is causing me to scratch my head [I may just be over thinking it]
The car came in about three months ago after cutting out and no charging. The garage said they replaced the 'regulator' and all was well and out it went again. Two weeks later it was back with the same issue and a comlaint that the dash was playing around. This time the garage fitted a quenuine 'regulator' and out it went again only to lasted a week.
This is where I came in. The battery is a silver calcium, I have checked the continuity from pin 1 and 2 on the altenator back to the ECU, checked the live feed to the altenator pin 3, all good.
I have scoped the waveforms [see below] What I can see is, the altenator is giving the ECU a feedback but the ECU does not appear to be demanding a higher charge rate. This waveform was done with the lights on full, HVAC on, rear de-mist on. I thought I would see a constant demand from the ECU to ramp up the charge rate, but we only get the intermitant PWM. There are no fault codes in engine ECU, only a U1262 SCP data link fault in the cluster which has deleted.
Can anyone tell me where the engine ECU gets its load demand from so I can check to see if the ECU is 'seeing' load.
Also, if I disconnect the altenator the charge rate raises to about 13.8v but once a load is put on it, it drops to about 12.4v. Is this correct or should we see a full charge rate like a traditional stand alone altenetor.
Sorry for the long drawn out post, I wanted to make sure I had put down everything in my scrambled head!
Regards
Simon
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