Electronic control unit problems

Electronic control unit: Engine Control Unit. It regulates all the aspects related to the engine's proper functioning.
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Top problems

There's no. Positive supply. Going to ecu

Toyota Corolla 2011 Sedan 120000 miles
All fuse. Are good.
The car. Won't. Start
Yan yan from Philippines 2 months ago  
YA

Ecu ig no1 & ecu no2 fuse not + electrical problem where comnig this c

Toyota Corolla 2011 1.3 vvti 200000 miles
P send this diagram ...fuse + problem ecu no1 ecu2 not
Imran- from Pakistan 2 years ago  
IM
2 reports 

Security system

Toyota Corolla 2005 LE 250000 miles
Security light flashes continually and the car won't start
Sparrow from United States 3 years ago  
SP
1 report 

Won’t start after accident changed ecu

Toyota Corolla 2009  8000 miles
Working on Toyota Corolla recently involved in accident changed ecu but check light doesn’t come on for it to start
Bongo from other 4 years ago  
BO
4 reports 

ECU and ignition failure.

Toyota Corolla 2004 Sedan 56500 miles
Crank, no start. No spark, no fuel activity. 1st code p171. Replaced MAF, both O2 sensors, pcv, iridium spark plugs twice, oil change and both oil/air filters.
Richie from United States 5 years ago  
RI
12 reports 

Rhe WCU pen our no.89661-12761 SolvedSolved

Toyota Corolla 2004  100100 miles
Xan i see the no. Of ECU no.89661-11761
1
Alexei from Philippines 3 months ago  
AL
1 reply 
Solved
Best answer (according to Alexei)
Alexei from Philippines 3 months ago
I can't plug and i don't understand
Comment

Won't Start

Toyota Corolla 2008 Corolla 150000 miles
Car won't start until the security light goes off sometimes it never goes off!So like everyone else sometimes starts sometimes won't? Diagnostic test showed nothing!
Used Car Blahs from United States 9 years ago  
US
7 reports 
Used Car Blahs from United States 9 years ago
Well there's a code B2799 which means your code that marries to the key. But it keeps resetting to a different code after you take key out possibly the key itself? Will give update when I find out!
Used Car Blahs from United States 9 years ago
Put a new alternator and will start sometimes just like before haven't got new key yet will update then!
Texaschic from United States 2 years ago
Must be copy. Transponder in key not a full match, ignition switch going out. But usually it’s the key. Veeeeeerrrrrrry rare it isn’t.
Rudela from other 2 years ago
Meu corola não pega na partida e a luz fica acesa .a bateria está ótima e o arranque tebem o q pode ser?
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2015 Toyota Corolla cranks but won't start, B2799 code

Toyota Corolla 2015 LE, 2ZR-FE engine  65000 miles
No previous related issues and it has always been able to start until very recently. I have 2 keys and neither had any issues before. Don't see what could have caused the problem. Tried disconnecting the battery and reconnecting it after 15-30 minutes but it doesn't change anything. Neither does trying to reset the ECU or immobilizer by connecting the 4th and 13th pins on the OBD-II connector, turning on the ignition, and waiting 30-45 minutes. The security light turns off when I insert the key (happens for both keys I have), presumably indicating that the immobilizer does recognize the key,… Read complete
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Dot2k from United States 3 years ago  
DO
3 reports 
Thato from other 2 years ago
Same problem mine cut the spark after it runs for about three seconds then it goes off
Gohe from Ethiopia 4 months ago
Mine is also the. Same
Comment

Problema con el aire acondicionado

Toyota Corolla 2005  135000 miles
Desde unos meses atras dejo de enfriar del lado del conductor, solo la salida del aire acondicionado del copiloto enfria adecuadamente, como podria solucionarlo, además de que tardea en enfriar
kirby from Mexico 12 days ago  
KI

Check engine light does not turn on in the run position

Toyota Corolla 2007 1.8 153000 miles
No crank no start replace ecu program asked for instructions still no crank no start
Paul from United States 3 months ago  
PA
2 reports 

Hessitate to accelerate

Toyota Corolla 2014  2200000 miles
Car sputters and hesitating to accelerate. I've changed the coil packs, spark plugs, PVC valve. Mas sensor, gas pedal acceleration sensor, throttle body and sensor, fuel pump and fuel filter, and cleaned the fuel injectors. And reset the ECU on a number of times.
Chad Prejean from United States 9 months ago  
CH
3 reports 

Door lock relay

Toyota Corolla 2005 vvti 180000 miles
Dc executive 2003 central lock relay wiring diagram
bird from other a year ago  
BI

Engine timing codes persist after replacing key parts.

Toyota Corolla 2018  61046 miles
Summary of Issue: The vehicle has consistently reported the following OBD-II codes: • P0012 (Permanent) – Camshaft Position A (Intake) Timing Over-Retarded • P0014 (Pending + Permanent) – Camshaft Position B (Exhaust) Timing Over-Advanced • P0015 (Permanent) – Camshaft Position B (Exhaust) Timing Over-Retarded • P0368 (New) – Camshaft Position Sensor B Circuit High (Exhaust, Bank 1) ⸻ Actions Taken: 1. Engine oil changed (Rymax Apollo FE-RC 0W-20 full synthetic). 2. Both VVT solenoids replaced (intake and exhaust). 3. Both camshaft position sensors replaced (intake and exhaust). ⸻ Current… Read complete
lilsanti93 from other a year ago  
LI
6 reports 

No crank no start

Toyota Corolla 2014 Corolla 1.8 175000 miles
Initial car was sputtering ,and lost power,changed spark plugs. Got in to start car with a weak battery slow start then I heard a wizzing sound. Replaced battery and now no dashboard lights or no indicator lights check engine,and,fuel nothing and no sounds. Checked fuses all good accept ecu-ig ig no 1 fuse 7.5 a changed the fuse and still no good. Now I'm stuck
Down and out from United States 2 years ago  
DO
3 reports 

My car won't keep a charge even with everything off

Toyota Corolla 2008 4.0 Corolla CE  300000 miles
My car won't keep a charge on the battery but my alternator is charging. The security system wire that hooks up to the positive post keeps melting no matter what gauge I try to hook it back up with
Chris from United States 2 years ago  
CH

Keeping Getting different electrical issues - is there a hidden cause?

Toyota Corolla 1994  200000 miles
1994 Corolla DX, generally in good running condition. Problem one: drove the car to a restaurant parking lot, picked up my food, went to the car to drive home and it wouldn’t start at all. No warning or precursor whatsoever. Tow it to a mechanic, replace the starter and “maintainence to wires”, seems to work okay for a week or so. Problem two: drove car to park, drove home. Noticed that the brake lights were on, even when the car was parked, key off, no one in it. Deduced it must be the brake pedal or switch. Takes a while to take it to my usual mechanic, he replaces the brake switch. Seem… Read complete
Erinys from Canada 3 years ago  
ER
1 report 

Whine from engine during driving

Toyota Corolla 1996 1.8 AE102 manual  90000 miles
Hi, I have a Toyota corolla 1.8 AE102 1996 I fitted a new timing belt and tensioner as well as the water pump, now when I start and drive I get a whine from the belt as if it is too tight but the tensioner is pre set with a spring load tho I did rotate the engine and loosened and retightened the tensioner. Can I loosen the tensioner in place and tighten it again to give it some slack? When I feel the belt it does feel good and secure as I used gates belt and tensioners the noise is slight whine tho it's driving me crazy as I'm doing a long distance trip next week.
Thitha from Australia 10 years ago  
TH
5 reports 
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