I need help or info about the OBD

DLNTHO

MEMBER
1999 ISUZU VEHICROSS
54,000 MILES

Hi
I need help or info about the OBD.I replaced the battery and forget to save the car memory, all the OBD Data lost and inspection fails
The mechanic told me run the car about 100 miles test again. When I test again I ready run on 1400 miles for the Fourth test and still fails. (OBD not READY) I just want to know what I need to do?
or If I need to replace the 1999 Isuzu vehicross ECU and did I need to reprogram.
Best Regards.

5 Replies

KHLOW2008

MECHANIC
41,814 POSTS

Computer needs to relearn after memory is lost and there are certain procedures you need to follow for it to get ready sooner.

Avoid abrupt acceleration during this relearn process.

Try running the vehicle on the highway at constant speed for 20 minutes and allow gradual deceleration whenever necessary and accelerate gradually.

Go to city driving for another 20 minutes and remember to be gradual with the accelerator and avoid abrupt braking as much as possible.

Go back to the highway for another 20 minutes and check if it is ready. If not, disconnect the battery for 20 minutes and after reconnecting, repeat the above process and retest.

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Tuesday, April 16th, 2013 AT 5:55 AM

DLNTHO

MEMBER
3 POSTS

Hi KHLow2008 and Thank You
Since I already drive 1600 miles and go to autzoxxx� and have them do a starting/charging system check� and not find any problem even use the code
reader still not a single code come up but still not ready for the readiness reading test. If possible the ECU had a problem?

And I just want to know If I need to replace the 1999 Isuzu vehicross ECU and did I need to reprogram the ECU.
Best Regards

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Tuesday, April 16th, 2013 AT 7:39 AM

KHLOW2008