Electronic throttle moto relay

ANDRIN ATEM

MEMBER
2005 NISSAN MURANO
3.6L
6 CYL
2WD
56,745 MILES

Thank you. I got this worry with a live data on the throttle moto relay shows of while the car idles. My question is, should the throttle body relay on IDPM fuse box stays on while vehicle idles, or it is normal to be off while engine is running. Secondly, when does the throttle moto relay comes on, when key is opened to acc? The car will not accelerate while on idling. Before replacing the electronic throttle body, I need to be sure I got no issues with the relay. Thanks.

11 Replies

JACOBANDNICKOLAS

MECHANIC
109,885 POSTS

Hi,

The electronic throttle control relay is on when the key is in the run position and not accessory. Power supply for the throttle control motor is provided to the ECM via the throttle control motor relay. The throttle control motor relay is ON/OFF controlled by the ECM. When the ignition switch is turned ON, the ECM sends an ON signal to the throttle control motor relay, and battery voltage is provided to the ECM. When the ignition switch is turned OFF, the ECM sends an OFF signal to the throttle control motor relay, and battery voltage is not provided to the ECM.

Let me know if this answers your question.

Take care,

Joe

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Monday, May 3rd, 2021 AT 5:28 PM

ANDRIN ATEM

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250 POSTS

I will not hesitate to ask. Your services and guide has improve my understanding and ability to solve problems relating to car technology. I could not have solved so may problems without 2CarPros. I will always come back when I need more ideas. Thanks again

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Tuesday, May 4th, 2021 AT 1:43 AM

JACOBANDNICKOLAS

MECHANIC
109,885 POSTS

You are very welcome. I don't want you to have more problems, but I do hope to see you again in the future. LOL

Also, would you consider leaving us a rating. It would be appreciated.

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Take good care of yourself,

Joe

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Tuesday, May 4th, 2021 AT 6:57 PM

ANDRIN ATEM

MEMBER
250 POSTS

Please, could you help me understand what voltages goes to the 6 wired cables which goes into the electronic throttle body. The red cable when tested with key on and engine running, I notice zero voltage, normally, when the relay stays on, I am suppose to get 5v or 12 volt of the red colored cable which enter the electronic body.

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Wednesday, July 14th, 2021 AT 6:28 PM

JACOBANDNICKOLAS

MECHANIC
109,885 POSTS

Hi,

I need to get a better understanding. Normally, sensors will receive a 5v reference. I need confirmation of which wires you are referring to.

Let me know,

Joe

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Wednesday, July 14th, 2021 AT 7:50 PM

ANDRIN ATEM

MEMBER
250 POSTS

The wires which connects to the throttle body itself. They are 6 wires. That goes or fits via a connector to the Throttle body.

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Thursday, July 15th, 2021 AT 1:35 AM

JACOBANDNICKOLAS

MECHANIC
109,885 POSTS

Hi,

If you look at the first 8 pics below, I provided the entire powertrain management wiring schematic. I had to cut them in half to make them readable, but I did overlap them so you can follow from one to the next.

Now, I highlighted all six of the wire you are referring to so you can have a visual of where they go and to help check them.

If you look at the very last pic below, it explains what the voltages are for the wires at the TB. For example, it explains to test the voltage to pin 50 on the PCM, which is the white wire between the PCM and the TB (TPS 1). It indicates what the voltage should be based on the throttle position.

If you look at pic 4, it shows the connection you are referring to at the throttle body.

Let me know if this helps or if you have other questions.

Take care,

Joe

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