2005 Nissan 350z / Anniversary Edition / Auto Trans / Brembos

ABS, BRAKE, VDC and SLIP light all on my dash. Scanner cannot communicate with abs module.

Proceeded to check basics, found fuse in IPDM Box labeled Brake to be blown- attempted to replace fuse to rescan but fuse immediately and violently blew.
Unplugged all connectors going to abs module and fuse continued to blow.

Okay... so short to ground present in harness leading from IPDM to ABS module, I proceeded to unplug connectors off the IPDM until said fuse no longer received power - (In this case ground). I found the corresponding harness and confirmed fuse no longer blew when harness was unplugged.

I had an oversight and didn't even bother checking online for a wiring diagram before continuing but, I backprobbed said harness and found which wire was grounding out the IPDM, I unhooked that one wire and short to ground was no longer present.

I was lazy and did a continuity test rather than removing cowl and wipers and following the wire physically leading to the ABS module. I found what I thought to believe was the correct wire through a continuity test from harness to harness, (Which I now realize is a flawed way to check, don't chew me out too bad lol), I ran a new wire -- (Again because I didn't want to remove cowl, have to uncharge the ac and remove ac lines and remove brake lines then have to bleed the brakes) -- with the new wire ran and everything hooked back up the short to ground was gone, the fuse no longer blew and the pump runs... great! Right? Well... now the pump runs but runs constantly and stays on even when car is off but ignition on. Still on my idiocy I figured the relay built into the module might've been damaged so I just ordered a new module and threw it in knowing it was unlikely, with the new module in the symptoms remain the same.

I'm now trying to find a wiring diagram on the FSM, but it's honestly, hard to read.

I'm not afraid to admit my rush job was wrong and I understand I didn't do a proper diag before proceeding with attempted repairs.

I'm humbly asking for assistance before proceeding any further, with reading the FSM. It almost appears to me as if the FSM shows a different style ABS module than mine. I have attached a photo of my style abs module...

I appreciate any insight and feel free to chew me out lol.


My style ABS Module

 

Removing the wipers and cowling is pretty easy on the 350Z compared to many other makes/models out there. I pulled this data from my 2006 FSM, specifying coupe and with VDC. There are some vehicles equipped with only ABS, no VDC, hence why you're seeing different diagrams and pinouts.

The only wire from the IPDM straight to the ABS module is on Pin - 1. It should be Green/Red, this carries 12V ignition power. I've been experimenting with AI LLM and RAG to quickly/efficiently get data from the 2006 FSM I imported.
Hope this helps.
-Icer

 

Here's the wiring information for a 350Z ABS module, WITHOUT VDC. The image of the module you shared above appears to be a non-VDC equipped unit since the connectors don't appear large enough to be 88-pin.

 

I didn't look for an option without VDC thanks a lot for this, I'm headed to the car now to check it out. This is a big help, and if you manage to get the AI down that'd be a HUGE breakthrough for this. These images you provided make it much easier to understand, thank you truly.

 

Hope it helps! I know it's an absolute pain fumbling through the FSM chapters tracing down wiring. Using Agentic AI to query the manual and compile all the data in an easy to digest "big picture" manner really speeds things up.

If you need to see more detail for a specific circuit, connector, connector location, etc....just let me know.
Good Luck!
-Icer

 

Confirming I actually do have VDC, have the button for it by knee and light on dash is present “VDC OFF”

I need to know the wiring for this connector off the ABS module :

Splits off into 4 harnesses. Two 8 pin harnesses , One 3 pin harness and one 2 pin. Also a grounding wire

 

See my 1st reply with VDC post, that shows the 88-pin connector details. I'll see if I can dig up the details for the smaller harness plugs.
-Icer

 

Ok, sorry for the confusion. E118 is the main brain box connector for the ABS Control module, which lives under the driver's dash. The harness plugs in the engine bay are E50 (8-pin black), E49 (8-pin gray), E48 (2-pin, black) or E222 (2-pin gray). Match up the colors and verify this data is accurate.
-Icer

 

Note: The main power feed wires on connector E48 (2-pin plug) route across the front of the engine bay, near the radiator core support, then driver's side inner fender. There are no splices or intermediate connections. Was your Z damaged in the front end at any time? IF YES, this may explain the short.

 

yes, I purchased the car and it had a front end damage. Nothing too major. it also damage to the door and fender area on the driver side.
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I checked connector E48 and I’m getting 12v to both the white/red wire and red/black wire when ignition is set to on. I ran continuity test for the two wires, to a chassis ground and got a 0 ohm reading


Would you happen to have the connector that’s right next to the E48 connector? It’s an 8 pin connector which only utilizes 4 wires.

 

I believe that's connector E47. See below.


E47 VDC Relay Box Pinouts

 

Be careful when probing any wires to the E118 connector at your ABS Control Module, the relays are activated/grounded via the Control Module. You will need to disconnect the main harness at the module (under driver's side dash) to check for shorts/continuity. Worst case scenario, the control module was damaged from this wiring fault.
-Icer

 

Just making sure this is the abs module. Which of the 3 connectors Is E118?

 

I believe the black box next to the dead pedal is the BCM (Body Control Module).
Note: Connector E118 (88-pin, black) uses a swing arm latching style harness connector, similar to the ECU.

The ABS control module is above the pedal area, to the right of the steering column. You will probably need to remove the lower dash panel to gain access.

Look for the large black 88-pin harness connector. There's not many of these on the 350Z, so it should be easy to identify.
-Icer

 

Harness like PCM, to the right of steering column above pedals. I removed harness and turned key to on position yet pump still runs nonstop when ignition on

 

IGNORE THIS

I found the right module. Photo attached below , confirmed pump shuts off when module disconnected

 

Is that the only large harness plug/connector in that area? Manual states it's black (not white) and should have 88-pins spread across 3 rows (see photo below).
-Icer

 

As I was posting, you were updating! Excellent that you found it.

Sounds like you have a dead short on one of the relay control wires.
-Icer

 

I got it. Now is it okay to test these through the front since I can’t backprobe or should I be testing them at the ABS module itself?

 

Go ahead and start testing the relay control wires, look for a short to ground.
Also, I assume you removed your original wire patch?
-Icer