ECU location

Tiny
ALFREDM8702
  • MEMBER
  • 2005 NISSAN ALTIMA
Can Someone Please Tell Me Where The Ecu Is Located?
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Wednesday, April 24th, 2013 AT 12:57 PM

10 Replies

Tiny
JDL
  • EXPERT
Hello,

The engine control module is located behind the glove box next to the TCM here is a diagram below to show you. Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.
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Wednesday, April 24th, 2013 AT 1:45 PM
Tiny
RENAV
  • MEMBER
  • 1993 NISSAN ALTIMA
  • 169,000 MILES
I need to locate the ECU unit. Thanks
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Tuesday, January 22nd, 2019 AT 6:13 PM (Merged)
Tiny
HMAC300
  • EXPERT
If you are having a problem with engine running you should scan for codes and check fuel pressure as it may not be the ECU. See picture for location and see link for fuel test.
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
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Tuesday, January 22nd, 2019 AT 6:13 PM (Merged)
Tiny
RENAV
  • MEMBER
Thank you for the info you provided, but we had professionals look at it and they said it needed to be replaced. I'm not going by my car inexperience just to assume that's what it is. I just need help in finding its location so we can replace it.
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Tuesday, January 22nd, 2019 AT 6:14 PM (Merged)
Tiny
HMAC300
  • EXPERT
You can it should. Be plug and play just don't bend any pins and if a prom unit inside old one put in new one
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Tuesday, January 22nd, 2019 AT 6:14 PM (Merged)
Tiny
JUNIOR64
  • MEMBER
  • 2001 NISSAN ALTIMA
  • 150,000 MILES
I unplug the spark plug wire and the spark plug to see if there a fire started when I turn on the engine but can't see the plug fire if there a engine computer send a signal to the spark plug, the distribuitor is new
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Tuesday, January 22nd, 2019 AT 6:14 PM (Merged)
Tiny
WRENCHTECH
  • EXPERT
SYSTEM DESCRIPTION
The ignition timing is controlled by the ECM to maintain the best air-fuel ratio for every running condition of the engine.

The ignition timing data is stored in the ECM. This data forms the map shown.

The ECM receives information such as the injection pulse width and camshaft position sensor signal. Computing this information, ignition signals are transmitted to the power transistor.

E.G, N: 1,800 rpm, Tp: 1.50 msec A BTDC

During the following conditions, the ignition timing is revised by the ECM according to the other data stored in the ECM.

At starting
During warm-up
At idle
At low battery voltage
During acceleration

The knock sensor retard system is designed only for emergencies. The basic ignition timing is programmed within the anti- knocking zone, if recommended fuel is used under dry conditions. The retard system does not operate under normal driving conditions.

If engine knocking occurs, the knock sensor monitors the condition. The signal is transmitted to the ECM. The ECM retards the ignition timing to eliminate the knocking condition.
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Tuesday, January 22nd, 2019 AT 6:14 PM (Merged)
Tiny
KHLOW2008
  • EXPERT
Did you check the crank position sensor and are there any trouble codes?
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Tuesday, January 22nd, 2019 AT 6:14 PM (Merged)
Tiny
JRPENA77
  • MEMBER
  • 1994 NISSAN ALTIMA
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 899,895 MILES
Where is the computer locates at? How does it look.
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Tuesday, January 22nd, 2019 AT 6:14 PM (Merged)
Tiny
SERVICE WRITER
  • EXPERT


https://www.2carpros.com/forum/automotive_pictures/30961_pcm_2.jpg

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Tuesday, January 22nd, 2019 AT 6:14 PM (Merged)

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