ECU location and replacement?

Tiny
SJ
  • MEMBER
  • 2002 TOYOTA COROLLA
Hi every body I have toyota corolla automatic 2002 my problem is that no work injector & coil because ecu no drive those is it a bad ECU?
Tuesday, October 23rd, 2007 AT 3:35 PM

34 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Turn key to On position, check power at the injector connector black and white-do you have power-if not you have and open wire all the way to the ignition switch or the switch itself.

Got power could be the computer ground drivers.

If the computer don't get the Ne and G from the crankshaft and camshaft sensors signals it will not tell the ignitors to fire the coils or any type of fuel injection.

If you're a DIY and lacking electrical/electronics background, your best bet is bring it in
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Tuesday, October 23rd, 2007 AT 4:24 PM
Tiny
SJ
  • MEMBER
  • 2 POSTS
Hi rasmataz
i check power ( injectors & coilsand and ecu ) and get that and worked fuel pump in time start.
But no signal for injectors & coils
i want to know that if getn"t signal of camshaft & crancshaft for ecu do work fuel pump?

Thanks for your guide
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Thursday, October 25th, 2007 AT 6:20 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
When you turn key to On-do you hear the fuel pump coming On? If not check the MAF sensor and circuit opening relay this the two that powers up the fuel pump.
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Friday, October 26th, 2007 AT 12:33 AM
Tiny
S-DIEHL3
  • MEMBER
  • 1 POST
  • 2000 TOYOTA COROLLA
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 103,000 MILES
I have been getting codes p1346 and p1349 for about a year and a half now I have replaced both the vvt oil flow solenoid and the timing gear test drove for about 5 miles then the cel came back on is there any other part that could be causing the problem. Bad ECU?
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Sunday, August 9th, 2020 AT 12:04 PM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Hi S-diehl3,

Here are the diagnostic procedures for P1346. P1349 is not listed anywhere, can you reconfirm the code?

DTC P1346: VARIABLE VALVE TIMING (VVT) CIRCUIT RANGE/PERFORMANCE
CAUTION:If ECM replacement is instructed in following testing, always ensure ECM connectors and ground circuit are okay. If either are suspect, repair and repeat testing to confirm ECM malfunction.

NOTE:
Variable Valve Timing (VVT) sensor may also be referred to as camshaft position sensor.

NOTE:
Bank No. 1 refers to bank which includes cylinder No. 1. Bank No. 2 refers to bank without cylinder No. 1.

Circuit Description

The Variable Valve Timing (VVT) sensor consists of a signal plate and pick-up coil. The signal plate has one tooth and is mounted on each intake camshaft. The VVT sensor provides feedback to ECM in order to control intake valve timing. DTC is set when ECM detects a deviation in crankshaft position sensor and VVT sensor. Possible causes are:

"Â Mechanical system malfunction (timing belt stretched of timing belt teeth jumped).
"Â Defective ECM.

Diagnostic Aids
Using scan tool, read freeze frame data. Freeze frame records engine conditions when malfunction is detected.

Diagnosis & Repair
Check valve timing. Check for loose, stretched or jumped teeth of timing belt. If problem exists, repair as necessary. If problem does not exist, replace ECM.
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Sunday, August 9th, 2020 AT 12:04 PM (Merged)
Tiny
WCREEDER
  • MEMBER
  • 1 POST
  • 2000 TOYOTA COROLLA
  • 4 CYL
  • FWD
  • MANUAL
  • 150,000 MILES
My 15 amp ECM fuse continues to blow
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Sunday, August 9th, 2020 AT 12:04 PM (Merged)
Tiny
CARADIODOC
  • MECHANIC
  • 33,871 POSTS
Hi wcreeder. Welcome to the forum. Plug in a pair of spade terminals in place of the blown fuse, then connect a light bulb to them with a couple of pieces of wire. A 12 volt brake light builb works nicely. The bulb will be full brightnes when there is a short on the line. Go around unplugging things and moving harnesses around until the bulb goes out or gets dim. That will give you a quick visual indiacation that you are on the right track.

Caradiodoc
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Sunday, August 9th, 2020 AT 12:04 PM (Merged)
Tiny
KELLIRAMIREZ
  • MEMBER
  • 4 POSTS
  • 1999 TOYOTA COROLLA
  • 4 CYL
  • AUTOMATIC
  • 190,000 MILES
I'm trying to program a new remote for my car and I can't find the ecu. I need to late the ecu for the alarm system
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Sunday, August 9th, 2020 AT 12:05 PM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Pic shows correct ecu and a pro needs to scan this to see what is wrong with system as he will have to program it anyhow you will not be able to unless you have a pro scanner.
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Sunday, August 9th, 2020 AT 12:05 PM (Merged)
Tiny
KELLIRAMIREZ
  • MEMBER
  • 4 POSTS
  • 1999 TOYOTA COROLLA
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 190,000 MILES
The first question I asked on here was where is the ecu and the person that answered said it was in the far left side of the dash.. The second question was how do I get to the ecu and the person answered, take out the glove box. So now my third question is, what? How does taking the glove box out help me get inside the dash on the drivers side? More confused now than originally
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Sunday, August 9th, 2020 AT 12:05 PM (Merged)
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
See Figure sorry for the miss info
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Sunday, August 9th, 2020 AT 12:05 PM (Merged)
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Hi, if you stay on the original post, the person your talking to will know your asking another question. If you make a new post, they won't know except by accident.

My info shows close to underneath center of dash. Note the picture, ecm. The picture came from 2carpros, poster--BMRFIXIT, several years ago. My info for removal is very basic, I'd have to look at it.
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Sunday, August 9th, 2020 AT 12:05 PM (Merged)
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Sorry doc, I didn't see you there, have a good day.
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Sunday, August 9th, 2020 AT 12:05 PM (Merged)
Tiny
KELLIRAMIREZ
  • MEMBER
  • 4 POSTS
  • 1999 TOYOTA COROLLA
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 190,000 MILES
How Do I get to the ecu
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Sunday, August 9th, 2020 AT 12:05 PM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Remove the golve compartment and you should be able to get to it.
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Sunday, August 9th, 2020 AT 12:05 PM (Merged)
Tiny
KELLIRAMIREZ
  • MEMBER
  • 4 POSTS
How is that? Another person told me its on the drivers side
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Sunday, August 9th, 2020 AT 12:05 PM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Sorry, it is below center of dash. See figure.
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Sunday, August 9th, 2020 AT 12:05 PM (Merged)
Tiny
ARNEL2008
  • MEMBER
  • 2 POSTS
  • 1999 TOYOTA COROLLA
Four cylinder two wheel drive automatic.

Where is the electronic control unit located?
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Sunday, August 9th, 2020 AT 12:05 PM (Merged)
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
ECU for what?
Engine, ABS? Any how here is a picture inside and out side of the car with the location of them all. Good luck.


https://www.2carpros.com/forum/automotive_pictures/99387_99_corrola_inside_1.jpg




https://www.2carpros.com/forum/automotive_pictures/99387_99_corrola_1.jpg

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Sunday, August 9th, 2020 AT 12:05 PM (Merged)
Tiny
ARNEL2008
  • MEMBER
  • 2 POSTS
Oh, I am sorry. I mean MAP.
I am planning to build the water4gas. I have located PCV already, but I would need help the location and how to identify the following:

1.
MAP Sensor. This is where I will connect the MAP sensor enhancer according the Water4gas ebook.


https://www.2carpros.com/forum/automotive_pictures/214188_MAPSenhace_1.jpg



2. Fuel line near the firewall? To connect fuel heater. Is this safe by the way?

Thanks
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Sunday, August 9th, 2020 AT 12:06 PM (Merged)

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