Isolating centre diff lock
Submitted: Tuesday, Jan 03, 2017 at 08:24
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Tim F3
Has anyone had experience with fitting an isolating switch to a centre differential ?
On my 100 series manual cruiser the centre diff lock is automatically engaged when low range is selected no option.
In my case i have a driveway thay would be easier to negotiate in low range (without locking centre diff and transmission wind up that occurs ). Would make reversing a large van mutch easier on the clutch.
Thankyou for your thoughts.
Reply By: Athol W1 - Tuesday, Jan 03, 2017 at 08:47
Tuesday, Jan 03, 2017 at 08:47
Tim
If you get under your car and look at the rear of the transfer case you will find a wiring loom plug at about the 1.00 o'clock position (tailshaft being centre of clock). Just by the removal of this plug you will find that Low Range can be engaged without the automatic application of the centre diff lock. It has NO other impact on the operation of the vehicle. Centre diff lock can then be manually engaged the same as when in high range. There is no need to fit any additional switches to the vehicle.
It is some years (about 10 and 2 changes of vehicle) since I did that to my 100s td auto for exactly the reasons that you mention.
Toyota, in their wisdom, realised that there was a need to be able to use low range without the automatic application of the CDL and they did eliminate this function on the 200 series.
Hope this helps.
Regards
Athol
AnswerID:
607184
Follow Up By: RBH - Tuesday, Jan 03, 2017 at 09:04
Tuesday, Jan 03, 2017 at 09:04
Just wanted to clarify this a bit.
Removing the plug on the transfer case is quick and easy, but for some vehicles it isn't the best option.
When low range is selected, as
well as engaging the centre diff lock, ABS is also deactivated (in vehicles with ABS) and the auto shift pattern is modified (for automatic vehicles).
So for manual cruisers without ABS, just pull the plug off the transfer case. But if you have an auto and/or ABS and you want to retain the factory settings you need to remove a wire from a transmission relay behind the glovebox - called the Pin 7 mod - just google that and you will find some info. Very quick and easy. It means that when you select low range, the computer thinks everything is normal, except it doesn't engage the CDL - you have control of that from the CDL button just like in high range.
Not sure how relevant that is to Prado's.
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Reply By: TomH - Tuesday, Jan 03, 2017 at 09:05
Tuesday, Jan 03, 2017 at 09:05
Its called Pin 7 mod
Heres how to find it Join Lcool Takes a day or so to get accepted.
Go into the search function type jdbb into the second box (Author)
Change
forum just below that to 100ser
Hit search and it should be the second result.
Or look here but the plug is behind the glovebox in r/h drives
http://www.sleeoffroad.com/technical/tz_cdl_pin7mod.htm
DO NOT DO THE UNDER THE VEHICLE REMOVAL OF THE PLUG AS IT WILL DISABLE ABS IN LATER VEHICLES
AnswerID:
607187