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Old Jun 20, 2021 | 07:32 PM
  #16  
Michael heckart's Avatar
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Relay is behind the passenger side kick panel under the glove box and it's blue, is that the fuel pump relay or another fuel pump relay? And if that circuit was compromise can I do anything to fix it
 
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Old Jun 20, 2021 | 09:47 PM
  #17  
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Take a picture of the relay, I couldn't find one on my 2006 coupe 6mt.
 
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Old Jun 21, 2021 | 11:57 PM
  #18  
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Originally Posted by Michael heckart
I have a 2003 Infiniti G35 sedan and I'm desperate need of a ECU my car is an automatic and will not start and I'm sure that this is the problem I've went through other things and come back to this every time. If anybody has one day you would like to sell from an automatic same year please message me

The blue relay
 
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Old Jun 22, 2021 | 12:06 PM
  #19  
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That relay is only on automatics and is for the TCM power supply.

 
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Old Jun 22, 2021 | 02:57 PM
  #20  
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Ok thank you so any thoughts on what to do ?is the TCM fried? And would that keep it from starting?
 
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Old Jun 23, 2021 | 03:56 PM
  #21  
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Any thoughts on what needs to be done
 
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Old Jun 26, 2021 | 11:55 AM
  #22  
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Here's the relevant part of the FSM, unplug the relay, turn the key to ON and test for power at pin 2 and 5 on the relay. The relay harness number is F105 and you can see it's layout at the bottom of the schematic.

If you do NOT have power at pin 2 then it's not getting powered from the ECM relay in the IPDM, hopefully that would just be a blown fuse #82.

Same with pin 5, check fuse 71 in the IPDM

If it DOES have power then replace the relay, Autozone carries those blue OEM Nissan relays for some reason so you can get it there rather than the dealership.

Also to backtrack a bit, exactly what is the car doing right now, the engine cranks but it will not start?



 
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Old Jun 26, 2021 | 07:15 PM
  #23  
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Exactly it cranks over over really strong but won't fire I sprayed some some starting fluid in there intake just to see if it was a fuel problem and still nothing
 
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Old Jun 26, 2021 | 08:38 PM
  #24  
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I would pull a plug and see if you're even getting spark.

If no spark it could just be a cam or crank sensor issue.

Does the tach move while cranking?
 
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Old Jul 1, 2021 | 05:43 AM
  #25  
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So not getting spark ,changed camshaft x2 and crankshaft sensor and nothing I will get a meter or test light tomorrow and see if the relay is ge5ing power as suggested
 
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Old Jul 2, 2021 | 01:06 PM
  #26  
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Is your NATS security indicator light next to the dash SOLID RED while cranking? If so then the car doesn't recognize the RFID chip from the key and it's a NATS/IVIS interlock. This is fixed by having a locksmith or the dealership reprogram the BCM to accept the key.

Sometimes these BCM's just have a heart attack and forget the key programming for no apparent reason.
 
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