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4JX1 Tech2 click test - first click strong then no more


 
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pinkspikyhairman
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Joined: 25 Aug 2016
Posts: 2

PostPosted: Mon Aug 23, 2021 17:09    Post subject: 4JX1 Tech2 click test - first click strong then no more Reply with quote

Hi, I have a problem with number 3 injector on a Trooper 3.0TD 4JX1.

Tech 2 returns error code P0203 Not Present Injector 3 Control Circuit.

Originally thought it was just an injector failure, but have had a replacement 3 times. The symptom is that after replacing with a new Isuzu injector, the same fault re-occurs, after 5 months, then 5 miles after a second new injector was fitted, then 35 miles after a third used injector was fitted. Tech 2 click test gives 5 strong clicks on 1, 2, and 4, but one strong click then either faint or no clicks on 3. Sometimes, it seems to clear intermittently when on lots of throttle, and, also when doing a click test. Sometimes the engine check light comes on straight away, sometimes after 30 secs.

Injectors were replaced each time by Old Mill Motors, so I doubt it's anything to do with the fitting. It feels like something electrical. The wiring from the loom at the RHS engine bay into the rocker cover has been repaired at some time in the past. The connector was removed and the wires are now crimped. There is also one solder joint in one wire further along. Running the engine and fiddling with the crimps has no effect, nor while doing the click test.

Has anyone got a Trooper 3.0TD year 2000 4JX1 wiring diagram?

Any ideas or suggestions? Please Smile
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PostPosted: Mon Aug 23, 2021 17:09    Post subject: Google Ads keep this community free to join!


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drew m
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Joined: 08 Nov 2015
Posts: 154
Location: falkirk

PostPosted: Tue Aug 24, 2021 7:31    Post subject: Reply with quote

Hi,
I would be thinking wiring as well after checking that I would be thinking about getting the ecu checked.
Drew
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pinkspikyhairman
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Joined: 25 Aug 2016
Posts: 2

PostPosted: Tue Aug 24, 2021 8:43    Post subject: Reply with quote

@ drewm thanks. Any suggestions for a good ECU testing/fixing company?
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drew m
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Joined: 08 Nov 2015
Posts: 154
Location: falkirk

PostPosted: Tue Aug 24, 2021 9:20    Post subject: Reply with quote

Hi,
I've not got any personal experience with any ecu companies but there are a few if you Google it, maybe Eithan from old Mill motor has had this problem before and could point you in the right direction, he may also recommend an ecu company I'd pm him.
Drew
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