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Replaced ecm now truck will not run, cranks over and starts then dies. Scanner says security code must be reset, how do you doit

Replaced ECM now truck will not run, scanner says security code must be reset, what is involved?

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  • Cars & Trucks Master
  • 21,873 Answers

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

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robshow
  • 367 Answers

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

fixincars
  • 335 Answers

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!
Please contact me if you need any additional information.
If you find the information provided helpful please give me a good rating
www.aceautomotive1.com

Posted on Aug 14, 2008

Caesarfix
  • 141 Answers

SOURCE: 92 dakota help

Check fuel filter and air cleaner, fuel pump or fuel pump relay

Posted on Jan 23, 2009

alicantecoli
  • 22246 Answers

SOURCE: Dealer said ecm is bad. No communication. I let my

if you left the battery connected then YES its possible

Posted on Jun 22, 2009

  • 55 Answers

SOURCE: l203 chev truck no power ecm codes p0131, p0137, p0151, p0157

these are all O2 sensor circut problems

Posted on Sep 20, 2009

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1 Answer

GM said the sensor by the oil filter on a 1997 achevia is a crank sensor you its a oil presser sw. and it is linked to Ign sw. how , will the eng die in a second if the wires are broken or the sensor


the oil pressure sensor tells the ECM when there is insufficient oil pressure to safely run the engine
when you start an engine there is oil covering the pump inlet and the pressure buils up
if there is insufficient oil to maintain pressure ,or the pump cannot maintain a low preset pressure , the ecm will shut the engine down to protect it
like wise if the wiring is loose /faulty the signal from the sensor is interrupted and that tells the ecm to shut the engine down
again if the sensor is faulty , the ecm will shut the engine down
how to fix :-
install a mechanical oil gauge in the system and check for oil pressure achieved
replace the sensor switch with a known good one
run the fault codes

Aug 31, 2015 | Cars & Trucks

4 Answers

96 dodge caravan 3.3 started then died and now will not start or even crank lights work dash lights up but nothing from under the hood new ecm starter battery and crank sensor have all been put on what...


If you replaced the ECM and didn't reprogram it. There's your problem. The ECM doesn't recognize the security code. And it will start and kill the vehicle three times before shutting down everything. IE.. starter, fuel.

Mar 28, 2015 | 1996 Dodge Caravan

1 Answer

02 vue was hard to start , then wouldnt changed cam and crank sensors and found fuel in the oil. now runs for ten minutes and dies wont re start have 9 codes all having ecm in common replace that next


WHOA COWBOYS AND GIRLS!!!
CHECK VERY CAREFULLY ALL PIN CONNECTORS AT ECM POWER PLUG FOR PROPER CONNECTIONS, BENT PINS ETC....
ECM'S DO NOT FAIL TOO OFTEN!

Feb 23, 2013 | 2002 Saturn VUE

2 Answers

Starts and dies on acceleration then will not run


crank shaft position sensor is most likely cause. Do check ignition and fuel pump relays with an ohmmeter to make sure they are not faulty. Check power to ignition module. You can also check crank sensor with the ohmmeter. Check all vacuum hose and also check throttle position sensor.

Nov 15, 2009 | 1995 Geo Metro

1 Answer

97 grand am wont start


It sounds as if you still have a problem with the anti theft system. Possible loose switch wiring in the dash or it was programmed and cycled incorrectly.

Aug 30, 2009 | 2005 Pontiac Grand Prix

1 Answer

Will start but rpm gauge jumps up and down then it dies


The problem you describe has NUMEROUS causes. Most common of these is a COIL is going bad. The RPM gauge gets its signal from the ignition coil/crank sensor circuit (could be either one OR could be the wiring between the engine control module (ECM) and the engine components. Does the Check Engine light come ON when this happens? Whenever the "Check Engine" light comes on, there is always a DTC (Diagnostic Trouble Code) stored in the ECM (Engine Control Module). You'll need an OBDII (On-Board-Diagnostics) scanner to retrieve any codes recorded/set in ECM. Once you do this and let us know what, if any codes are set, then we can go from there.

Apr 21, 2009 | 2001 Kia Optima

2 Answers

02 nissan sentra


Its possible, that you crank angle sensor is failing. Also, that vehicle had a issue with the ECM/computer. Nissan put a set of foams inside of the ECM box to prevent the ECM from movement, however the glue that they used to attach the foams was causing the ECM to fail. The vapors from the glue would eat up vital circuits inside the computer causing failuer. I would go to your local dealer and provide them with your VIN nujber. With the VIN number, thay can check to ysee if the foam campaign has been doen and also the crank and cam angle sensor camaign. Nissan volunteraly replaced cam and crank angle sensors if the VIN number matches the campaign. Your ECM/computer is covered for 8years or 80000 miles. We are also starting to see timing chains getting stretched causing running issues, but you will have a "check engine light on" for cam angle sensor circuit. Anyhow, go to your local friendly NIssan dealer and have them run your VIN number to see if you have any open campaigns (crank and cam sensors, ECM foam etc.) Good luck and let me know what you find.

Nov 03, 2008 | 2002 Nissan Sentra

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