Hi All,
This is my first time post seeking some advice on my Toyota LX470 2004 Landcruiser- location Australia.
I have purchased after it had an engine and transmission conversion.
The engine is a GM 6.5 TD with mechanical controlled fuel pump, and the transmission is a GM 4L80e with 6 speed conversion and Compushift II controller.
Since purchasing it has tested my knowledge, I still seem to have more questions than answers.
The main issue that I have not been able to resolve since purchasing- I found the air conditioning compressor was hard wired to operate the A/C.
I am not happy with this as the compressor never turns off, I want it to be controlled by the climate control system.
I have returned the compressor wiring to oem. Now when I earth the compressor wire at the ECU the compressor engages.
Problem is the ECU won't switch the earth signal??
A lot of ECU wires are cut and not used due to the conversion, problem is I don't understand the Lexus system enough to know the list of ECU inputs that is required before the engine ECU is allowed to activate the compressor.
Items that have been checked;
Pressure switch circuit checked- all good
A/C on/off switch input signal all good
Thermister sensor checked- all good
Replaced engine ECU- no change
Replaced A/C amplifier ECU- no change
The Stanadyne compressor does not have a lock sensor- 1000K ohm resistor connected to the lock sensor return signal wire (when no lock sensor signal is received the A/C clutch should engage for 5 seconds then switch off. The A/C clutch does not engage at all, at any-time)
The cluster gage tacho has never worked- I have ordered an SGI-100BT signal converter. (I am hoping the engine rpm signal will be the missing ECU input required to activate the A/C)
I hope some-one knows and is able to share all ECU inputs and circuit bypasses required to turn on the compressor.
Some-one may also know how to connect the GM front crankshaft speed sensor to the SGI-100BT.
Thanks in advance,
Ben.
This is my first time post seeking some advice on my Toyota LX470 2004 Landcruiser- location Australia.
I have purchased after it had an engine and transmission conversion.
The engine is a GM 6.5 TD with mechanical controlled fuel pump, and the transmission is a GM 4L80e with 6 speed conversion and Compushift II controller.
Since purchasing it has tested my knowledge, I still seem to have more questions than answers.
The main issue that I have not been able to resolve since purchasing- I found the air conditioning compressor was hard wired to operate the A/C.
I am not happy with this as the compressor never turns off, I want it to be controlled by the climate control system.
I have returned the compressor wiring to oem. Now when I earth the compressor wire at the ECU the compressor engages.
Problem is the ECU won't switch the earth signal??
A lot of ECU wires are cut and not used due to the conversion, problem is I don't understand the Lexus system enough to know the list of ECU inputs that is required before the engine ECU is allowed to activate the compressor.
Items that have been checked;
Pressure switch circuit checked- all good
A/C on/off switch input signal all good
Thermister sensor checked- all good
Replaced engine ECU- no change
Replaced A/C amplifier ECU- no change
The Stanadyne compressor does not have a lock sensor- 1000K ohm resistor connected to the lock sensor return signal wire (when no lock sensor signal is received the A/C clutch should engage for 5 seconds then switch off. The A/C clutch does not engage at all, at any-time)
The cluster gage tacho has never worked- I have ordered an SGI-100BT signal converter. (I am hoping the engine rpm signal will be the missing ECU input required to activate the A/C)
I hope some-one knows and is able to share all ECU inputs and circuit bypasses required to turn on the compressor.
Some-one may also know how to connect the GM front crankshaft speed sensor to the SGI-100BT.
Thanks in advance,
Ben.
