I have a quick disconnect on my battery and disconnect it all of the time as I have a battery drain which I can't figure out. I have to get my emissions test done and they tell me I should come back in 10 days. Does anyone know how many miles you have to drive before the ECM registers the data again? Also do you have to drive under a certain speed? Or over a certain speed?

I know this happened to me two years ago, but since I rarely drive the S-Type anymore, I have make sure I have the time to consume the proper miles before bringing it in to the emissions testing place.

Thanks,
Harry

 

The readiness monitors usually take 50 to 100 miles to set to all good. Often it will take several cold start to full warm up cycles. Many hand help DIY scanners will give monitor status. I always check that all are good before I take cars in for the biennial California smog checks.

My experience over many makes and models is that all except EVAP set fairly quickly. In fact, in California a car will still pass if EVAP (and only EVAP) has not set. Redundant as far as Jaguar goes though. Their software is formatted so CCM will not set until all others clear, including EVAP.

 

100 miles is the standard. If you have a OBD scanner, P1000 is set (which your scanner...and the emissions place, will see...without a check engine light) after a battery change or all codes are cleared. After 100 miles, the P1000 goes away, and you'll be able to get retested. Was advised to take it on the highway so the ECM can capture some data.

 

I believe all the drive cycles required to set each monitor are listed in JTIS. Or somewhere...I know I've read them before...and wherever I read them, it would've been documentation available here on the forum.

 

It might reset in 50 miles or has some owners have found- 500 or more. There's no set number unless the car is driven precisely in accordance with the Jag drive cycles as mentioned above. If it just the EVAP monitor remains, make sure the fuel level is correct. Low or full tank inhibits the test.

 

3 cold start drive cycles is the minimum requirement with all the driving manors listed in jtis . . and as stated , fuel level is required to be above 1/2 and below 3/4. to reset
comprehensive component . and evap

one very important requirement is to reach 60mph and decelerate all the way to 25mph to set the egr monitor and that one wont set till drive cycle 2 .
i've had mine set in two days 3 drive cycles and under 50km distance traveled .

i would strongly recommend a plug in battery maintainer like a c-tech or something similar , to maintain your voltage rather than disconnecting the battery .
as your car is having to relearn its fuel table/trims every time you reconnect as well . not ideal

 

For my (later) car it's in the front of the codes PDF (the one for the PCM).

EVAP usually needs a cold soak (over night).

Coast downs as mentioned already are needed to be able to detect such as misfires.

If you can't get P1000 to turn to P1111 then OBD can tell you the monitors that have & haven't set. Let us know in case we've ideas.

 

Evap Monitor

Fuel level between 1/4 to 3/4 full.

Ambient temp over 40 degrees F.

Engine not run for preceding 8 - 12 hrs.

Start car, don't turn off until following is done:

Drive car to an open road. If possible try and hold speed at some point between 35 - 45mph for a minute or two.

Within 10 mins of starting get the car to a speed of between 55mph - 65mph and hold it there at a steady speed (constant throttle) for at least 7 mins. (Don't set cruise control!)

Slow down (when possible) to a stop, let car idle for 1 min, shut car off.