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Old Dec 13, 2023 | 12:26 PM
  #21  
abran's Avatar
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From: Huntington Beach CA
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Originally Posted by Extinct
I have never had a BCU/ECU get out of sync, however you do need to sync the interior fusebox to the BCU/ECU. Have you changed any of that recently? Or perhaps the fusebox has failed.
Ive never had to sync an interior fuse box on a D2, its plug and play. On other models. Like an LR3 the interior fuse box is also the BCM, so it needs syncing.

its something simple. Go back to the crank sensor. Is it plugged in?
 
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Old Dec 13, 2023 | 06:07 PM
  #22  
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Syncing the fusebox is absolutely a thing, I have never been able to swap one successfully without syncing it and I have done dozens although I have never heard of one unsyncing due to a dead battery. The IDM is in the fusebox, to sync a fusebox you need to turn on the ignition and leave it in that state for 15-20 mins. From page 1288 of the RAVE workshop manual:

"The BCU also communicates with several other electronically controlled systems such as the EAT ECU and SLABS
ECU and also has a datalink between the Intelligent Driver Module (IDM) and the instrument pack. The datalink is a
low speed bus capable of transmitting and receiving messages at a data rate of 10,400 bits per second. Additional
inputs and outputs to peripheral devices are included which are necessary for determining vehicle status for particular
logical operations e.g. crank, ignition key inserted, fuel flap enable etc.
The BCU receives its power supply from the engine compartment fuse box, and is protected by a 10 A fuse.
The BCU communicates with the IDM to provide the control signals to perform power switching operations in
conjunction with dedicated relays.
IDM
The IDM is integrated into the passenger compartment fuse box, which is mounted behind the fascia below the
steering column. There are no harnesses between the fuse box and the IDM. The IDM performs the power switching
operations for several of the vehicle's electrical systems.
The IDM communicates with the BCU and the instrument pack via a serial interface. If the BCU or the IDM is replaced,
the communications link between the two units has to be re-established. This can be done either by switching on the
ignition and leaving it on for five minutes, or by using TestBook. The vehicle immobilisation will remain active until the
communications link between the BCU and IDM has been re-established."
 
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Old Dec 14, 2023 | 07:41 AM
  #23  
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Originally Posted by Extinct
Syncing the fusebox is absolutely a thing, I have never been able to swap one successfully without syncing it and I have done dozens although I have never heard of one unsyncing due to a dead battery. The IDM is in the fusebox, to sync a fusebox you need to turn on the ignition and leave it in that state for 15-20 mins. From page 1288 of the RAVE workshop manual:

"The BCU also communicates with several other electronically controlled systems such as the EAT ECU and SLABS
ECU and also has a datalink between the Intelligent Driver Module (IDM) and the instrument pack. The datalink is a
low speed bus capable of transmitting and receiving messages at a data rate of 10,400 bits per second. Additional
inputs and outputs to peripheral devices are included which are necessary for determining vehicle status for particular
logical operations e.g. crank, ignition key inserted, fuel flap enable etc.
The BCU receives its power supply from the engine compartment fuse box, and is protected by a 10 A fuse.
The BCU communicates with the IDM to provide the control signals to perform power switching operations in
conjunction with dedicated relays.
IDM
The IDM is integrated into the passenger compartment fuse box, which is mounted behind the fascia below the
steering column. There are no harnesses between the fuse box and the IDM. The IDM performs the power switching
operations for several of the vehicle's electrical systems.
The IDM communicates with the BCU and the instrument pack via a serial interface. If the BCU or the IDM is replaced,
the communications link between the two units has to be re-established. This can be done either by switching on the
ignition and leaving it on for five minutes, or by using TestBook. The vehicle immobilisation will remain active until the
communications link between the BCU and IDM has been re-established."
thanks will try this, however I don’t think I’m immobilized
 
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Old Dec 14, 2023 | 09:51 AM
  #24  
abran's Avatar
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From: Huntington Beach CA
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Originally Posted by Extinct
Syncing the fusebox is absolutely a thing, I have never been able to swap one successfully without syncing it and I have done dozens although I have never heard of one unsyncing due to a dead battery. The IDM is in the fusebox, to sync a fusebox you need to turn on the ignition and leave it in that state for 15-20 mins. From page 1288 of the RAVE workshop manual:

"The BCU also communicates with several other electronically controlled systems such as the EAT ECU and SLABS
ECU and also has a datalink between the Intelligent Driver Module (IDM) and the instrument pack. The datalink is a
low speed bus capable of transmitting and receiving messages at a data rate of 10,400 bits per second. Additional
inputs and outputs to peripheral devices are included which are necessary for determining vehicle status for particular
logical operations e.g. crank, ignition key inserted, fuel flap enable etc.
The BCU receives its power supply from the engine compartment fuse box, and is protected by a 10 A fuse.
The BCU communicates with the IDM to provide the control signals to perform power switching operations in
conjunction with dedicated relays.
IDM
The IDM is integrated into the passenger compartment fuse box, which is mounted behind the fascia below the
steering column. There are no harnesses between the fuse box and the IDM. The IDM performs the power switching
operations for several of the vehicle's electrical systems.
The IDM communicates with the BCU and the instrument pack via a serial interface. If the BCU or the IDM is replaced,
the communications link between the two units has to be re-established. This can be done either by switching on the
ignition and leaving it on for five minutes, or by using TestBook. The vehicle immobilisation will remain active until the
communications link between the BCU and IDM has been re-established."
crazy, I’ve never synced one and always have been able to plug and play!
 
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Old Dec 15, 2023 | 09:26 PM
  #25  
99TEXASD2's Avatar
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From: TEXAS
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I only brought it up because I have had that happen....it happened on my 03 D2 (R.I.P.) after it was down for an extended period of time for a motor swap (no electronics were swapped only a motor)...I remember chasing down why it wouldn't start and someone eventually asking if maybe hit had loss sync...It's actually why I ended up buying a nanocom.
 
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Old Dec 19, 2023 | 12:53 PM
  #26  
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Update!
the fuel pump is getting proper voltage however I’m only getting 6v at the fuel injectors
 
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Old Dec 19, 2023 | 12:56 PM
  #27  
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From: SE PA
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You can't measure voltage at the injectors, the pulse is too quick. You need to use a noid light. The presence of some amount of voltage is probably a good sign however.
 
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Old Dec 22, 2023 | 04:09 PM
  #28  
abran's Avatar
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@Extinct i just swapped in an interior fuse box on an 04’, no syncing needed. Not telling you to say you are wrong, as clearly RAVE states it, but wanted to share my experience.
 
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Old Dec 22, 2023 | 05:36 PM
  #29  
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Wild. I have had trucks not start if I did not sync them, wonder what the difference is?
 
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Old Dec 22, 2023 | 07:11 PM
  #30  
abran's Avatar
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From: Huntington Beach CA
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Originally Posted by Extinct
Wild. I have had trucks not start if I did not sync them, wonder what the difference is?
great question. All I can say is I have only done it on 03’ and 04’ vehicles, so maybe there is something there. I’ve done at least 5 times that I can remember, probably more though
 
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