Octavia TDI dont start.

SorenLarsen · 06-02-2008, 16:34

My Octavia Diesel TDI will not start. The fuel pump do not get the 12 volt
when turning the key. Are there any fuse for this? All indikators in the dashboard
are normal.

silvergun1 · 06-02-2008, 18:40

I'm fairly sure there is a fuse for the ECU, which would lead to no turning over if it's blown. Open the driver's door, and the bit of the dash that is exposed by opening the door you can prise this off. There should be a little fuse removal tool. Take the fuses out and have a look. It should be fairly obvious. Although there could be a problem in the starting circuit. How do you measure the voltage to the pump?

SorenLarsen · 06-02-2008, 23:36

Quote:

Originally Posted by silvergun1

I'm fairly sure there is a fuse for the ECU, which would lead to no turning over if it's blown. Open the driver's door, and the bit of the dash that is exposed by opening the door you can prise this off. There should be a little fuse removal tool. Take the fuses out and have a look. It should be fairly obvious. Although there could be a problem in the starting circuit. How do you measure the voltage to the pump?

Yes, The voltage is 0.04 volt when turning the key. It should be 12 volt.

SorenLarsen · 06-02-2008, 23:38

Quote:

Originally Posted by silvergun1

I'm fairly sure there is a fuse for the ECU, which would lead to no turning over if it's blown. Open the driver's door, and the bit of the dash that is exposed by opening the door you can prise this off. There should be a little fuse removal tool. Take the fuses out and have a look. It should be fairly obvious. Although there could be a problem in the starting circuit. How do you measure the voltage to the pump?

I measure with a voltmeter. 0.04 volt at keyturn, Should be 12 V
IF i force 12 volt to the pump, its working ok.

SorenLarsen · 06-02-2008, 23:39

I measure with a voltmeter. 0.04 volt at keyturn, Should be 12 V
IF i force 12 volt to the pump, its working ok.

SorenLarsen · 06-02-2008, 23:41

Quote:

Originally Posted by silvergun1

I'm fairly sure there is a fuse for the ECU, which would lead to no turning over if it's blown. Open the driver's door, and the bit of the dash that is exposed by opening the door you can prise this off. There should be a little fuse removal tool. Take the fuses out and have a look. It should be fairly obvious. Although there could be a problem in the starting circuit. How do you measure the voltage to the pump?

Measured with a voltmeter 0.04 volt at keyturn.

silvergun1 · 07-02-2008, 06:47

You seem to know what youre doing. Should you really force 12v into the pump without the help of the ECU? The fuses are easy to look at. It should not take you longer than a minute or two to find a broken one. Just make sure you put them back in the same place!

fordfan · 07-02-2008, 07:48

Relay 109 the X relay for the electrics, or try freeing the anti shudder valve as this can stick blocking air into the engine

KenONeill · 07-02-2008, 08:53

Identify the relevant fuse, and replace it, even if it looks ok. It's rare, but not impossible for a blown fuse to look ok, but not be capable of carrying current.

06-02-2008, 16:34	#1
SorenLarsen Briskodian Join Date: Feb 2008 Posts: 5 Thanks: 0 Thanked 0 Times in 0 Posts	Octavia TDI dont start. My Octavia Diesel TDI will not start. The fuel pump do not get the 12 volt when turning the key. Are there any fuse for this? All indikators in the dashboard are normal.

06-02-2008, 18:40	#2
silvergun1 Briskodian Join Date: May 2007 Posts: 71 Thanks: 0 Thanked 2 Times in 2 Posts	Re: Octavia TDI dont start. I'm fairly sure there is a fuse for the ECU, which would lead to no turning over if it's blown. Open the driver's door, and the bit of the dash that is exposed by opening the door you can prise this off. There should be a little fuse removal tool. Take the fuses out and have a look. It should be fairly obvious. Although there could be a problem in the starting circuit. How do you measure the voltage to the pump?

06-02-2008, 23:39	#5
SorenLarsen Briskodian Join Date: Feb 2008 Posts: 5 Thanks: 0 Thanked 0 Times in 0 Posts	Re: Octavia TDI dont start. I measure with a voltmeter. 0.04 volt at keyturn, Should be 12 V IF i force 12 volt to the pump, its working ok.

07-02-2008, 06:47	#7
silvergun1 Briskodian Join Date: May 2007 Posts: 71 Thanks: 0 Thanked 2 Times in 2 Posts	Re: Octavia TDI dont start. You seem to know what youre doing. Should you really force 12v into the pump without the help of the ECU? The fuses are easy to look at. It should not take you longer than a minute or two to find a broken one. Just make sure you put them back in the same place!

07-02-2008, 07:48	#8
fordfan ECUless Join Date: Mar 2005 Posts: 1,840 Thanks: 28 Thanked 208 Times in 181 Posts	Re: Octavia TDI dont start. Relay 109 the X relay for the electrics, or try freeing the anti shudder valve as this can stick blocking air into the engine

07-02-2008, 08:53	#9
KenONeill Briskodian Join Date: May 2006 Location: Normally somewhere in Scotland! Posts: 9,413 Thanks: 46 Thanked 436 Times in 429 Posts	Re: Octavia TDI dont start. Identify the relevant fuse, and replace it, even if it looks ok. It's rare, but not impossible for a blown fuse to look ok, but not be capable of carrying current.

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