OBD2 flash code does not work?

JAI287

MEMBER
2002 HOLDEN JACKAROO
3.0L
4 CYL
TURBO
AUTOMATIC
336,769 MILES

Pins 6 and 4 which you can usually jump to get the flash code does not work anymore and even with plugging my tech 2 tool in doesn't read? It'll just stay waiting for data and never load?

Saturday, July 26th, 2025 AT 7:04 PM

5 Replies

KEN L

MASTER CERTIFIED MECHANIC
54,138 POSTS

I don't think this car can have the check engine light blink codes, it must be done with the scanner, make sure the scanner works in another car, here is a video to help us fix it:

https://www.youtube.com/watch?v=6Tlg3JmgNSQ

Also, please check the fuse# c-14 (stoplight A/T cont) in the fuse panel at the left kick panel inside the car.

This guide can help as well:

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Check out the images (below). Please let us know what happens.

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Sunday, July 27th, 2025 AT 12:28 PM

JAI287

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3 POSTS

No it usually flashes I've jumped pins 4 and 6 multiple times before getting a tech 2 and the c 14 fuse was fine

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Sunday, August 3rd, 2025 AT 1:36 PM

KEN L

MASTER CERTIFIED MECHANIC
54,138 POSTS

Flash code method - but only if it’s the early OBD-II hybrid setup. I would turn the car on, engine not running and check all of the other fuses especially to the PCM.

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Sunday, August 3rd, 2025 AT 1:39 PM

JAI287

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Would you know which fuses that would be that I'd have to check?

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Sunday, August 3rd, 2025 AT 4:36 PM

KEN L

MASTER CERTIFIED MECHANIC
54,138 POSTS

Yes, the FL-3 ECM fuse under the hood, and the c-8 engine fuse c-9 IG coil fuse and the c-4 elec-ign fuse in the fuse panel under the dash. This guide can help.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

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