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Go Back   TDIClub Forums > TDI Model Specific Discussions Areas > VW MKIV-A4 TDIs (VE and PD)

VW MKIV-A4 TDIs (VE and PD) This is a general discussion about A4/MkIV Jetta (99.5-~2005), Golf(99.5-2006), and New Beetle(98-2006). Both VE and PD engines are covered here.

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Old April 20th, 2012, 11:35   #1
cassel.joshua
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TDI(s): 2001 Jetta
Default 2001 Jetta no start...help!

Hey guys I have an 01 Jetta Tdi and need some help it won't start my CEL has code P0725 and the connector on my crank sensor was broke so i replaced it. It has a 3 pin connector the outer 2 wires are showing ground but the one in the middle has no power and no ground. I traced the wire back to the ECM and there is no break in the wire. I think I could need a ECM just not sure. any help???
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Old April 28th, 2012, 21:26   #2
cassel.joshua
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Any body??
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Old April 28th, 2012, 21:30   #3
Seatman
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If there's 3 wires shouldn't there be power, earth and signal? I'm wondering if there's a short in one of the other 2. Do you have some sort of wiring diagram?

Might be able to find a pin out for the ecu on here

http://www.ecuconnections.com/
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Old April 28th, 2012, 21:46   #4
whitedog
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Pin 3 is the ground and is connected to the shielding.

You can unplug the connector and check the continuity again to see if things change.
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Old May 2nd, 2012, 07:58   #5
cassel.joshua
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Ya I'll check it
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Old May 2nd, 2012, 09:22   #6
db252
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How about your p109 relay? Has yours been changed? It's a cheap diagnosis to change out and avoid possible problems in the future along with correcting this.
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Old May 3rd, 2012, 07:03   #7
cassel.joshua
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I have not changed the 109 but I did remove it and test it and it seems to be working fine. If the 109 was bad there would be more problems then just this one thing right? I had the wiring for the crank sensor but my small child has moved it to some place "to keep it safe" so its gone.
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Old May 3rd, 2012, 07:10   #8
whitedog
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You can jump the connections so that it's like the relay is in there and activated.
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Old May 3rd, 2012, 14:02   #9
cassel.joshua
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Did that and i'm still not getting power to my crank sensor
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Old May 3rd, 2012, 14:49   #10
whitedog
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Are you getting power out of the ECU for the crank sensor?
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Old May 4th, 2012, 06:08   #11
cassel.joshua
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Ok, pins 1 and 2 of the sensor go to the pins 110 and 108 of the ECM I used the volt meter to check the resistance of the wires and they checked out good .2-.3.. now on the ECM I ohmed to see from pin 110 to pin 108 on the ECM to see if there was resistance and all I got was an open circuit not sure what that means, now for the ground wire the resistance on that was at 9.3 ohms
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Old May 4th, 2012, 06:18   #12
whitedog
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Josh, did you get power on pins 110 or 108 on the ECU?
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Old May 4th, 2012, 11:17   #13
cassel.joshua
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no I did not
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