My 2 wheel drive would have interaction but not my 4. I examine the tccm and the vaccum switch and to my selected amazement the vaccum line had damaged off the switch. I fixed this situation and now my four wheel push is Doing the job once again. The information you posted saved me a visit into a dealer!!!
For anyone who is certain that the signal within the button is reaching the TCCM, then either the TCCM is terrible, or even the encoder signal traces have already been broken. Yet again, I’d really need to check wires to get favourable, but it surely appears (through the schematics) that the encoder sign strains are sizzling (pull-up resistors are being shown on Just about every sign line) and are pulled lower to activate a certain mode. Pins 26 by means of 28, to the TCCM pinout, will be the encoder sign lines.
You understand, it Seems an awefull ton like what mine was performing — which turned out to become the “plastic” bushings amongst the forks In the transfer case.
Your comment about getting into slippery ailments as well as 2Hi light-weight goes out… the only thing I am able to visualize may be the TCCM (Transfer Scenario Command Module) might have corroded wires, which was the initial subject matter of the thread. Does this occur instantly when you enter into slippery disorders?
Additionally, getting your tires inflated effectively is significant for having accurate reads on the measurements You will be having later on.
) The 4lo gentle justs blinks constantly never goes in only goes back to 4hi. I here the click Together with the TCCM and I also listen to the encoding motor working also.
PS – the flashing swap lights indicate the program is trying to talk to the remainder of the program. When it stops, this means it could not talk to part of the procedure.
If I’m not mistaken 1999 and back, the vacuum change is in addition to the transfer situation. 2000 and up it’s around the firewall. If it’s along with the TC, it appears like a nut with 3 hoses sprouting from it.
How to check When the change is poor? I’m unsure which swap you’re referring to, but no, I do not. I’d simply Google it more often than not to seek out what I’m on the lookout for. Every thing that I ever desired to take a look at was observed as Visit This Site a result of Google.
I have discovered I may get it out of 4HI in one of two strategies. If I park while caught in 4HI and leave the vehicle for a while, when started 4HI will flash and it reverts back again to 2HI. OR If I place the truck in neutral, press 4LO (it goes into 4LO) then press 2HI, There is certainly clunk and it goes back into 2HI.
Roll the car. Press the car forward not less than ten ft With all the steering wheel unlocked to make sure the wheels are straight.
goes into store this week..just asking yourself whether it is a linkage of some kind? it's possible u joint? The lights exhibits which the change into 4Hi is entire and 4 vehicle also..but just no traction from entrance wheels..probably a transfer case problem?
I don’t Consider this is probably going for being your issue as you need to possibly hear the encoder motor operating (transforming the travel mode from 2Hi to 4Hi/4Lo) — but there's a sensor on the hub to tell the TCCM when it is actually engaged, so it could be trouble.
The very first thing I might do is disconnect the battery and Enable it sit to get a one/two hour or so — then reconnect the battery and cycle the ignition from on to off thrice — This could reset the TCCM.