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Old 02-18-2014, 11:06 PM   #37
yaristar
 
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Is the body ECU a part of the fuse box because I have already Replaced that when the problem initially started and is the body ecu the same as the chassis ecu
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Old 02-18-2014, 11:26 PM   #38
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Is the body ECU a part of the fuse box because I have already Replaced that when the problem initially started and is the body ecu the same as the chassis ecu
Yes. The body ECU lives within the fuse box and can be referred to as the chassis ECU. There are many different part numbers for the body ECU, based on configurations of the car. Did you match up the part number when you replaced yours?
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Old 02-18-2014, 11:42 PM   #39
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I did not match the numbers but the same problem persists after replacing the fuse box the fuse box i got was off of a 2007 yaris sedan loaded and mine is a 2008 toyota yaris base
Can it also be possible that the engine control unit can also be bad?
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Old 02-19-2014, 06:29 AM   #40
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I did not match the numbers but the same problem persists after replacing the fuse box the fuse box i got was off of a 2007 yaris sedan loaded and mine is a 2008 toyota yaris base
Can it also be possible that the engine control unit can also be bad?
I don't believe that it is the ECM (engine computer), as you would have a check engine light if he could not communicate. Were you able to check that top rear connector (it just has 4 wires in it, but they are the CAN bus wires for the cluster and for the body ECU).

While you are back there, see if you can get the part number off the new one. It is on a paper label on the back.
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Old 02-19-2014, 07:32 PM   #41
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Hi,
I looked at the connector in the rear top of the fuse box it has 3 wires going into(doesnt seem to have a 4th) I also tried unplugging the connector and it didn't make a difference
I noted the number of the back of the fuse box it is 82730-52620 and 9847 on the new one
on the old one the numbers are 82730-52610 and 9846
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Old 02-19-2014, 08:14 PM   #42
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Hi,
I looked at the connector in the rear top of the fuse box it has 3 wires going into(doesnt seem to have a 4th) I also tried unplugging the connector and it didn't make a difference
I noted the number of the back of the fuse box it is 82730-52620 and 9847 on the new one
on the old one the numbers are 82730-52610 and 9846
3 wires is actually correct for that vintage. The junction connectors where all of the inside CAN devices connect together are just above the kick panel on the passenger and driver's side. They are two 22 pin connectors. The cluster goes to the passenger side one and then from the the yellow and white twisted pair connect over to the driver's side one.
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Old 02-19-2014, 10:56 PM   #43
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Thank You so much!!
You found the problem one of the grey connectors on top the passenger side kick panel cap was off.
Thanks again for helping me solve this big problem
I would have never thought of that or known about that I was going to replace the the ecm you saved me a lot of money!!
Thank You

Last edited by yaristar; 02-19-2014 at 11:30 PM.
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