Throttle body is not responding to acceleration?

Tiny
JOHANND83
  • MEMBER
  • 2006 NISSAN MURANO
  • 3.5L
  • V6
  • 4WD
  • AUTOMATIC
  • 210,345 MILES
Hi,

I've already done the following:

Replaced to a new throttle body.
Change the IPDM Module.
checked the connector for damage wires or pins, all are good.
I've replaced relays and fuses.
I checked voltage and I found out that in 4 of the 6 pins have 12v and the other 2 have 6v.

At this point I'm thinking do I have to replace the ECM?

Please let me know what could it be or what else I have to check.

Thanks
Monday, March 17th, 2025 AT 5:11 AM

5 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 50,192 POSTS
The first thing I would do is run the codes to see which ones are stored, this guide can help:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Please check the fuses, it sounds like the car is in limp mode, so we need the codes to see which system is having an issue. I can tell you I have seen the accelerator pedal position sensor go out and cause this problem.

Please go over this guide as well:

https://www.2carpros.com/articles/reduced-power-limp-mode

Check out the images (below).
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Monday, March 17th, 2025 AT 1:20 PM
Tiny
JOHANND83
  • MEMBER
  • 3 POSTS
Hi, thanks for the quick response.
I forgot to mention the codes are 2
P2100
P2101
Related to throttle body.
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Monday, March 17th, 2025 AT 1:26 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 50,192 POSTS
Thank you, the code that can cause all of this is the P2100. Before replacing the PCM let's check the wiring between the throttle body and PCM. Here is a guide to help and the wiring diagrams below to show you which wires to test.

P2100 - Throttle Actuator Control Motor Circuit/Open
P2101 - Throttle Actuator Control Motor Circuit Range/Performance

https://www.2carpros.com/articles/how-to-check-wiring

There are only five wires to test, here are the wiring diagrams for the throttle body, engine and PCM. Look for rodent damage while you are testing. Here is the location of the PCM as well. Check out the images (below). Please let us know what happens.
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Tuesday, March 18th, 2025 AT 9:20 AM
Tiny
JOHANND83
  • MEMBER
  • 3 POSTS
Hi, thanks for the reply. That was the information I was looking for; I really appreciate it. I followed the diagrams and found the following.
ECM is not receiving the 12 volts (pin 3) from the IPDM (from relay) I changed the relay and still no 12 volts coming out. I bypassed the relay and I jumped cable from battery (positive terminal) to the ECM Pin 3 and boom my throttle body is working like new.

Can you please help with IPDM diagram to see what pin/terminal feeds the ground to the throttle relay?
For some reason realy is not engaging (clicking) to send the 12 volts to ECM.
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Wednesday, March 19th, 2025 AT 8:38 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 50,192 POSTS
Great work! I would check for power at the fuse #87 15 amp this is where the power comes from. If there is no power the TIPM is bad. Here are the TIPM wiring diagrams as requested, you can see the power of the throttle control relay is from a fusible link C but it would affect other systems as well. Check out the images (below).
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Friday, March 21st, 2025 AT 8:48 AM

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