I have a 2003 G35 6MT that I have been trying to fix recently and it’s been a pain in the a**. Originally the car was running rough due to it needing new cam sensors and a new crank sensor. 4 days ago I was driving and it felt different in the way it usually drives (acceleration was slightly slower). Another issue it was having is that it would grind going into 3rd gear. But I was on my way home and the car was running poorly. I managed to make it to my driveway and it died at the bottom of my driveway. I tried turning it on so I could move it up to the top but it would crank and not start. After the 3rd time of trying to get it started, it would just click and not start. I later pulled my car to the top of my driveway and replaced the crankshaft and cam sensors that I got from the junk but they are in good condition. The car would still not crank it start, it would just do 1 single click when I tried turning it on. I put my OBD2 scanner on it and I have the U1000 code which is my CAN communication not receiving signal from one of my modules and a C1136 code for Engine signal 6. I cleaned and tightened my grounds, checked my ECM relay, ABS module, re tightened negative battery cable, checked battery for voltage and tapped starter with metal rod and still nothing. I talked to an infiniti specialist and he said get a scan from a CAN Scanner called consult 3 but that’s WAY out of my budget. On the OBD2, i get 2 codes under ABS section which are the U1000 and C1136 and 1 code under BCM which the U1000 code also shows up again. RADIATIOR FAN TURNS ON WHEN IGNITION SWITCH IS TURNED TO ON. Any help would be MUCH appreciated because I have ran out of ideas:/

 

Did u ever get this issued fixed? Im having the same thing with the starting issue but ihave u1001 and p1212.

 

I looked into the U1000 code. Here are some of the possible causes for it not starting.
* CAN harness opened or shortened out
*Faulty ECM
*The ground for the CAN harness is poor

The second code that came up because your ABS is getting a signal that your CAN connector harness isn't working. Try checking out your ground or maybe if any wires are loose on the harness. Hope this helps!!

 

Both those codes are likely because the ABS system is unplugged somewhere.

Are you getting a solid red security indicator while trying to crank the engine?

 

No, indicator goes away with keys in ignition. Don't know which grounds to check for CAN or ABS

 

Here's a link to the FSM, document starts at FWD. A lot of the canbus stuff is in LAN but you may have to reference PG (power/grounding).

https://www.nicoclub.com/infiniti-service-manuals

 

Yes I am on my car,

 

Yes I'm gettin a Solid red security light

 

Solid red NATS indicator means the BCM doesn't recognize the transponder chip in your key.

 

So how do I go about fixing this issue sir, any help is greatly appreciated 🙏

 

Normally you would call up a locksmith that can program Nissans and have them try to program your key, or cut you a new one and program that key.

That's the cheapest option anyway.

 

I’m having the same issues did you end up fixing the problem?

 

P1212 ABS/VDC/TCS control unit not working

U1001 CANBUS some computer isn't working