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Great information contained in here. Having multiple people successfully carry out the removal of the CSOLU gave me a fair bit of confidence although as previously mentioned that first whack is a hard step to take.
My story is that a week ago my 2005 4.2 patrol didn't start warm. After a few attempts it started and all seemed OK. Over the week it deteriorated to the point that it would not start warm at all and would only start to get to work and to get home from work. Also, as is common here the red immobiliser light came on after about a minute of driving.
The instructions contained here are great so I thought it was worth adding my notes and photos as I am sure others will have this issue.
I removed intercooler bolts and disconnected the large hoses and then just lifted it out of the way with the smaller hoses still connected. A piece of wood held it up.
Definitely disconnect as much of the wiring loom as you can from around the area and tie it back to the side. I had dual battery cables in the vicinity so had to get those out of the way as well. The more room the better.
Make sure you catch everything when you disconnect the fuel line (ie washers) it's a bugger when they fall and don't make it out the bottom.
I didn't have to go through the base plate of the CSOLU. Once I reached the circuit board I levered it out carefully and unsoldered the sought after white wire, which had about 10mm of insulation protruding plus the wire that was soldered to the circuit board.
A laptop and USB webcam were very useful to have a look at where I was at and what needed attacking next.
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