Question about Cars & Trucks
Replaced ECM now truck will not run, scanner says security code must be reset, what is involved?
Depending on the year make and model, you would need to have the dealer program the new computer with their scanner.
Posted on May 05, 2013
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Posted on Jan 02, 2017
SOURCE: 2004 kia optima
Try the ignition switch,
For the Crank sensor there is a small metal disc that mounts behind the sensor if that is cracked or dammaged or installed backwards you will get same results as if it wasn't Make sure the timing marks line up on your timing belt. www.kiatechinfo.com
Posted on Jan 19, 2009
SOURCE: obd1 scan tool will notaccess
A couple of ways to check and see if the computer is ok first:
check engine light must come onwith they in on position
The fuel pump must run for two (2) seconds with the key ON
There must be a 5 volt reference at sensors like map, TPS
Must communicate with scan tool
The ORANGE wires at the computer are you power input wires one has 12V all the time this is your KEEP ALIVE MEMORY
one is 12 with the Key on you MUAT HAVE VOLTAGE AT BOTH
Check the computers Ground most are out under the hood and are brown wires
Try the GM TAP TEST this is a factory authorized test with the computer connected and you verified all of the above SLAP the computer with the open hand firmly not too hard but firm see if anything changes,
Do not disconnect the battery you will erase all the codes!
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Posted on Aug 14, 2008
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