Car wont start after sitting for a month, cranks , battery fine

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Ptyrell

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	Car wont start after sitting for a month, cranks , battery fine « on: April 28, 2018, 04:46:03 AM »

Hi guys,

My B4 S4 wont start , was sitting for a month or so cranks fine, charged and swapped batteries.

Have this DTC

Address 17: Instruments Labels: 8D0-920-xxx-17.lbl
Part No: 8D0 920 930 F
Component: B5-KOMBIINSTR. VDO D07
Coding: 02764
Shop #: WSC 00222
VCID: 29538C00D3E23D6

Component: AUZ7Z0X1160367
ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ AUZ7Z0X1160367

1 Fault Found:
01177 - Engine Control Unit
49-00 - No Communications

Any ideas?


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_nameless

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	Re: Car wont start after sitting for a month, cranks , battery fine « Reply #1 on: April 28, 2018, 07:05:29 PM »

Quote from: Ptyrell on April 28, 2018, 04:46:03 AM

well it would help if you scanned the ecu and not the cluster to start.


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Ptyrell

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	Re: Car wont start after sitting for a month, cranks , battery fine « Reply #2 on: April 28, 2018, 07:19:59 PM »

That's the only error, I did scan the ECU as a single module and it had no errors. I can also read/write to the flash


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_nameless

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	Re: Car wont start after sitting for a month, cranks , battery fine « Reply #3 on: April 28, 2018, 07:28:06 PM »

fuel pump running while cranking? if not relay / bad pump. is the cel on when you tun the key on? if not then missing switched power to ecu


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Ptyrell

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	Re: Car wont start after sitting for a month, cranks , battery fine « Reply #4 on: April 28, 2018, 09:28:19 PM »

Thanks mate for the reply, I will get someone to crank while I listen for the fuel pump priming.

I have no CEL lights on dash, says OK


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Ptyrell

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	Re: Car wont start after sitting for a month, cranks , battery fine « Reply #5 on: April 28, 2018, 11:26:53 PM »

Cant hear the fuel pump , put a phone in there while put key to position 2 just before start. Also cranked it, nothing on phone. Its a Walbro 450 , so its pretty loud. Only done few hundred km,

I can hear relays behind the dash etc.

When the key is on position 2 (not crank) the EPC and battery light is on. If I crank then stop they go away and OK is on the display

Checked the fuses also. Not looking forward to pulling the fuel pump out Tongue


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Ptyrell

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	Re: Car wont start after sitting for a month, cranks , battery fine « Reply #6 on: April 29, 2018, 08:58:26 PM »

Here is a video of key on no crank

https://youtu.be/-PThEYR_y2s

I can read the cluster eeprom and use MElogger as normal


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Ptyrell

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	Re: Car wont start after sitting for a month, cranks , battery fine « Reply #7 on: April 29, 2018, 09:28:29 PM »

Is there anyway my cluster programing has freaked? I was on H box and the ecu tune is based on M box

Nah looked at it ok


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Ptyrell

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	Re: Car wont start after sitting for a month, cranks , battery fine « Reply #8 on: April 30, 2018, 07:56:24 AM »

Quote from: Marty on April 28, 2018, 07:28:06 PM

fuel pump running while cranking? if not relay / bad pump. is the cel on when you tun the key on? if not then missing switched power to ecu

What relay controls the switched power to the ecu?


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