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Tec 2 Operation - non starting enine.


 
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bigbluetruck
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Joined: 27 Jan 2016
Posts: 9
Location: Cornwall

PostPosted: Sat Feb 25, 2017 16:18    Post subject: Tec 2 Operation - non starting enine. Reply with quote

Hi I have a 2003 3.0TD manual that wont start and having done the usual checks (white wire, 2lt oil, fuel delivery, RPCV check) I have resorted to buying a Tec2 to try and identify what is playing up. The Tec 2 and Isuzu K line card has been initialised and self tests ok and when connected to the vehicle with ignitin on it appears to take readings ok, though there are no stored codes (expected as the battery had been removed for charging).
My question to anybody that is familiar with Tec2 operation is how do I view live data when turning the engine over on the starter motor? When I try this, as soon as I turn the engine over I loose power to the Tec2 and it goes back into the start up sequence. I have tried powering the Tec2 via the DTC and alsoconnecting via the cigarette lighter socket as well as the DTC.
I would be grateful if someone could tell me if I am doing this incorrecly (and what I should be doing) or whether I have a seperate power supply problem which I need to fix as well.
many thanks.
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eithan h
Moderator
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Joined: 11 Dec 2005
Posts: 8195
Location: oxfordish

PostPosted: Sat Feb 25, 2017 19:10    Post subject: Reply with quote

you need to use a separate battery to power it don't use anything on the vehicle, it's the downside to the clone tech2 ours does the same
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bigbluetruck
Newbie


Joined: 27 Jan 2016
Posts: 9
Location: Cornwall

PostPosted: Sun Feb 26, 2017 18:46    Post subject: Reply with quote

Cheers Eithan. I will get a spare battery this week and give it another go using that to power the Tec2.
Many thanks.
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pcourtney
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Joined: 17 May 2017
Posts: 48
Location: Bishops Stortford

PostPosted: Fri Sep 08, 2017 17:50    Post subject: Reply with quote

just make sure between the Tech II and your 12v battery that you have a 3 amp fuse on the red, and another 3 amp inline fuse on the black wire

http://www.thebatteryshop.co.uk/y21-12-yuasa-yucel-12v-21ah-lead-acid-battery-598-p.asp
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White Trooper SWB 2003 (commercial)
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02Trooper777
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Joined: 08 May 2016
Posts: 488
Location: Shropshire

PostPosted: Fri Nov 24, 2017 0:26    Post subject: Reply with quote

The 'clone' Tech2 from obd2.co.uk  comes with a battery connector (red and black clamps) and has two built in fuses to protect things.
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02 3.0 Trooper
Saab 9-3 2.3i convertible.(to be sold)
BMW 540i/6   1939 HRG 1100
1986 Saab 900 Turbo. '84 Marlin Roadster.
+ motorcycles & '76 Reliant Kitten (don't laugh - it has got 4 wheels)...
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02Trooper777
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Joined: 08 May 2016
Posts: 488
Location: Shropshire

PostPosted: Fri Nov 24, 2017 0:27    Post subject: Reply with quote

3 amp blade fuses.
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02 3.0 Trooper
Saab 9-3 2.3i convertible.(to be sold)
BMW 540i/6   1939 HRG 1100
1986 Saab 900 Turbo. '84 Marlin Roadster.
+ motorcycles & '76 Reliant Kitten (don't laugh - it has got 4 wheels)...
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02Trooper777
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Joined: 08 May 2016
Posts: 488
Location: Shropshire

PostPosted: Sat Jun 09, 2018 23:38    Post subject: Reply with quote

My clone kept on rebooting whenever I tried to read cranking data - even with another 12V battery as a power source.
Changed the inadequate DC/DC converter within and it solved the problem totally.
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02 3.0 Trooper
Saab 9-3 2.3i convertible.(to be sold)
BMW 540i/6   1939 HRG 1100
1986 Saab 900 Turbo. '84 Marlin Roadster.
+ motorcycles & '76 Reliant Kitten (don't laugh - it has got 4 wheels)...
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pcourtney
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Joined: 17 May 2017
Posts: 48
Location: Bishops Stortford

PostPosted: Sun Jun 10, 2018 1:27    Post subject: Reply with quote

I had how to replace the DC to DC Converter as well  -  working great now  Smile

Recom Through Hole 10W Isolated DC-DC Converter, Vin 9 → 18 V dc

http://blog.obdii365.com/2017/05/25/replace-gm-tech2-dc-to-dc-converter/
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White Trooper SWB 2003 (commercial)
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02Trooper777
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Joined: 08 May 2016
Posts: 488
Location: Shropshire

PostPosted: Wed Jun 13, 2018 0:35    Post subject: Reply with quote

Very hard to understand that 'translation' ... much of it is gobbledegook ...

I used advice from saabcentral forum ... rather easier to understand :-
http://www.saabcentral.com/forums/archive/index.php/t-567490.html

DC to DC converter was [£1.66 a couple of months ago]from fleabay :-
https://www.eebuygum.co.uk/itm/LM2596-LM2596S-Step-Down-Power-Supply-DC-DC-Voltage-Regulator-Arduino-UK-C515/162592582599?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
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02 3.0 Trooper
Saab 9-3 2.3i convertible.(to be sold)
BMW 540i/6   1939 HRG 1100
1986 Saab 900 Turbo. '84 Marlin Roadster.
+ motorcycles & '76 Reliant Kitten (don't laugh - it has got 4 wheels)...
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02Trooper777
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Joined: 08 May 2016
Posts: 488
Location: Shropshire

PostPosted: Wed Jun 13, 2018 0:38    Post subject: Reply with quote

Apologies for spacing error. Forum's 'Edit' facility simply did not appear ...
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02 3.0 Trooper
Saab 9-3 2.3i convertible.(to be sold)
BMW 540i/6   1939 HRG 1100
1986 Saab 900 Turbo. '84 Marlin Roadster.
+ motorcycles & '76 Reliant Kitten (don't laugh - it has got 4 wheels)...
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