Son bought a 2003 350z. The dash is lit as stated above and the brakes are soft. If you push them once then let off and hit them a second time they are better to stop. I’ve been researching a bit and have bled and bled with a suction type and a pressure type bleeder tool and it will not get better. I’ve tried two code readers and no communication to abs module. I’m thinking abs module is dead and air is stuck in there. Can I replace just the module or do I have to replace the entire pump and module?

 

I'm pretty sure the ABS module and pump are a combo unit. What type of scan tools did you use? Not all scanners can communicate with ABS modules, BCMs, and other computers on modern vehicles. You may need a high end bi-directional scan tool to activate the ABS pump and use it to help purge any potential air trapped in the pump. ABS modules/pumps are not cheap and failures are very rare. I see you're in the rust belt, so it's possible the pump module has corroded and failed, but more likely you have a wiring fault somewhere from corrosion.

Also, what type of front brakes does the vehicle have? I have learned that the Brembo brakes in particular require you to remove the upper caliper bolt and loosen the lower bolt (front brakes only). This will allow you to tilt the calipers forward allowing the air to properly escape out the bleeders. I learned this lesson the hard way when I 1st upgraded to Brembo brakes. I bled the system multiple times, but it wasn't until I found a little instruction sheet written by Stoptech that shed light on this. Sure enough, after following the procedure I got a lot of additional bubbles out of the front calipers and my brake pedal went from mushy/spongy to rock hard. Give this a shot and see if there's an improvement.
Good Luck!
-Icer

 

I appreciate the suggestions. One scanner was a lesser quality one so I wasn’t that surprised it didn’t read the abs module. The other was an OTC unit that I’m not sure of the model but it’s what my local pep boys uses in their everyday diagnostics. I figured the OTC one would be able to communicate with the abs module…. No luck. The module I’m speaking of is the one under the dash. Computer more or less that controls the ABD,VDC, and Slip. That’s the one I can’t crack into to cycle the pump.
it’s a 2003 with standard front brakes. Non Brembo so single bleeders.

 

The underdash module (passenger footwell) is the PCM (engine/trans management). If you can't even communicate with that, then you got bigger problems.
-Mark