E38 - L77 conversion - Won't start
Posted: Mon Aug 01, 2022 9:52 pm
Hello,
I have got a VF Calais L77 6L with a 6L80E that I'm trying to get running. It came with the main engine loom which has the plugs to the E38 ECU along with 3 other plugs, one to fuse box, one for other various signals and a smaller one which is mainly for brake signals.
I have made up a wiring chart and pinned into these 3 plugs to try and get it started.
I have applied the VATS patch, and disabled the starter monitoring, I can make it crank and get no spark or fuel.
I've been searching for a few answers and can't seem to find what I'm after so was hoping someone can help.
Will P1682 - Driver 5 Line 2 (permanent) prevent the engine from running?
I have scoured through all the wiring and as far as I can see on the VF E38 drawings that I have, there are no ignition/acc feeds to X2, on X1 I have the following powered with 12V
X1 - 18 - Accessory wakeup serial data (without power on this the speedo reads 280km/h, seems I need this high as it also powers pin 9 on the auto for serial data wakeup
X1 - 19 - Run/Crank Ignition 1 voltage
X1 - 20 - Battery + voltage
X1 - 47 - Powertrain Main Relay Fused Supply (1)
What else is the ECU looking for that generates this error? Is it looking for serial data from a BCM for ignition voltages or have I missed a pin somewhere that needs voltage? I have wired a relay coil on X1-59 (Powertrain relay coil control) in case it was looking for a relay load (as well as the starter output and fuel pump relay output).
I also get U0109 - Lost communication with fuel pump controller. It looks like it's something in the OS that I can't delete. I don't mind if I have to install this module, but will this error prevent the ECU from allowing it to run? (I do have an operating pump and fuel pressure at the rail)
U0140 - Lost communication with BCM, this is expected with any 'stand alone' conversion I'm tipping and assume this shouldn't be a cause of no run provided the VATS is disabled?
Brake pedal position sensor circuit - I'll have to put a resistor across this, as open it generates a fault and shorting generates a fault, but will this prevent it from starting?
P0230 - Fuel pump primary circuit - Will this prevent it from running? I've got my own switch on the fuel pump temporarily, but can fiddle around and wire into the ECU, I've read on other forums that people have their car running but check engine light is on with this fault, so I'm guessing not the cause. Could it be that this fault may be generated as the ECU cannot see the FPCM and is looking for can bus data from the module saying it has power?
I have attached pdf's of the drawings I'm working with along with the tune I currently have in (and the original tune).
OS: 12656930 -> 1250242
Main operating system: 1250242
Any help to get this thing started is appreciated.
Thanks
Ben
I have got a VF Calais L77 6L with a 6L80E that I'm trying to get running. It came with the main engine loom which has the plugs to the E38 ECU along with 3 other plugs, one to fuse box, one for other various signals and a smaller one which is mainly for brake signals.
I have made up a wiring chart and pinned into these 3 plugs to try and get it started.
I have applied the VATS patch, and disabled the starter monitoring, I can make it crank and get no spark or fuel.
I've been searching for a few answers and can't seem to find what I'm after so was hoping someone can help.
Will P1682 - Driver 5 Line 2 (permanent) prevent the engine from running?
I have scoured through all the wiring and as far as I can see on the VF E38 drawings that I have, there are no ignition/acc feeds to X2, on X1 I have the following powered with 12V
X1 - 18 - Accessory wakeup serial data (without power on this the speedo reads 280km/h, seems I need this high as it also powers pin 9 on the auto for serial data wakeup
X1 - 19 - Run/Crank Ignition 1 voltage
X1 - 20 - Battery + voltage
X1 - 47 - Powertrain Main Relay Fused Supply (1)
What else is the ECU looking for that generates this error? Is it looking for serial data from a BCM for ignition voltages or have I missed a pin somewhere that needs voltage? I have wired a relay coil on X1-59 (Powertrain relay coil control) in case it was looking for a relay load (as well as the starter output and fuel pump relay output).
I also get U0109 - Lost communication with fuel pump controller. It looks like it's something in the OS that I can't delete. I don't mind if I have to install this module, but will this error prevent the ECU from allowing it to run? (I do have an operating pump and fuel pressure at the rail)
U0140 - Lost communication with BCM, this is expected with any 'stand alone' conversion I'm tipping and assume this shouldn't be a cause of no run provided the VATS is disabled?
Brake pedal position sensor circuit - I'll have to put a resistor across this, as open it generates a fault and shorting generates a fault, but will this prevent it from starting?
P0230 - Fuel pump primary circuit - Will this prevent it from running? I've got my own switch on the fuel pump temporarily, but can fiddle around and wire into the ECU, I've read on other forums that people have their car running but check engine light is on with this fault, so I'm guessing not the cause. Could it be that this fault may be generated as the ECU cannot see the FPCM and is looking for can bus data from the module saying it has power?
I have attached pdf's of the drawings I'm working with along with the tune I currently have in (and the original tune).
OS: 12656930 -> 1250242
Main operating system: 1250242
Any help to get this thing started is appreciated.
Thanks
Ben