Thread: ECU Symptoms?
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Old 03-16-2011, 07:20 PM
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bennyb53 bennyb53 is offline
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2019 Sentra
2002 Altima
 
Join Date: Jan 2011
Location: Hawaii
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First, have the ECM scan for trouble codes. This really takes the guesswork out. Find a freelance mechanic who will do it for $25.

From all that I have read, while the ECM may go bad, though rarely the case. Does your '96 have a anti theft system? Are you using the original transponder key.

My no start was due to control unit immobilizer malfunction ( in nissan world lingo). Its located by the ignition key cylinder. It receives signal from transponder key and sends to ECM. Does your security light stay on while cranking your engine. If so, this is the culprit and computer put car in lockdown mode. You can replace it yourself but you have to take car to dealer to program the new part and all your keys.

In addition to what Nissan Tech said, check the fuses ( fuel pump, lights, radio, etc.) Check for bad crankshaft position sensor or MAF sensor. All the above and more you will know if you scan the ECM.
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