Question about 2003 Mitsubishi Diamante

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Car stuck in idle

I recently replaced my car battery and now when ever I push on the gas the engine stays at idle rpms. The TCL Off light is also Blinking.

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You need to have you idle relearned. Here is the procedure.

Relearn procedure

"Make sure that all accessories are turned off, a.c. radio, lights etc.."

That is very important as the bcm will learn the wrong idle speed and you will find yourself in the same position.

1. Unhook the battery for a few minutes and then hook back up
2. From a cold start. Turn the ignition to the acc position for 20 seconds and then turn back off.
3.start the engine with no accessories on and let the engine idle from cold to normal temp for 15 minutes.
4. Shut the engine off.
5. Turn the ignition to the acc position and then back off.
6. Start the engine and let it idle in park for 3 minutes.
7. While engine is still running hold in brake and put it in drive. With brakes pressed it the engine idle in drive for 3 minutes.
8. Put the car back in park and shut off for 20 seconds.
9. Start the engine.
10. That should do it.
(According to Mitchell)

Posted on Jan 21, 2018

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Trying disconnecting the battery again this time for 10 to 15 minutes. Then reconnect and see if it clears the problem.

Posted on Feb 05, 2009

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