Incorrect digital information

SARGIS36

MEMBER
2009 TOYOTA COROLLA
12,500 MILES

On the dashboard (digital) shows there is for "example 15" miles to drive according to fuel in tank, then I refueling, the dart rises up, but as digitally it shows again 15 miles, and after much driving ( one or two days) it only just itself shows the expected normal digits. But sometimes it's not rectified sometimes it does. Why it’s so? How can be rectified it?

3 Replies

DRCRANKNWRENCH

MECHANIC
3,380 POSTS

The odometer data, I assume this readout is coming in through odometer readout when chosen, often goes through may other circutis on the way to the readout. Becasue most can have the selection of data changed via the steering wheel controls, the steering controls are part of the circuit. Often, because of this, the circuit runs through the radio as well. It is very hard to diagnose the data readout because of this.
The first thing to do would be to have the trouble codes pulled. Any Advance Auto or Auto Zone will do this for free. However, the PCM that controls this function is expensive. Unless you want to go to a salvage yard to get one, or have one pulled, you will find a new one very expensive and not easily replaced.

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Wednesday, December 7th, 2011 AT 10:50 AM

SARGIS36

MEMBER
10 POSTS

Thank you very much for advice. I will pull the trouble code, then just will be clear how to go on.

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Wednesday, December 7th, 2011 AT 3:19 PM

DRCRANKNWRENCH

MECHANIC
3,380 POSTS

There is not much you can do as they are so expensive. Price one out from a junkyard. Even then it may be some other part of the circuit that is causing the problem. Circuit board level diagnosis is impossible without the correct fixtures.
I hope things turn out well.

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Wednesday, December 7th, 2011 AT 5:17 PM