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Testing transfercase switches to diagnose flashing CDL on Gen III #1057995 03/22/13 11:44 PM
Joined: Feb 2013
Posts: 34
F
Fergie Offline OP
Getting the Wheeling Fever
Hey all,

So I've replace the solenoids and freewheel switch, and still get the flashing CDL. My next step is to test the transfercase switches per this site: http://www.pajeroclub.co.za/forum/viewtopic.php?f=52&t=2077

A few questions though: 1. Should I have the ignition on when I do this? 2) How do I go about checking the continuity? Do I put one lead of my multimeter on the pin in the switch and the other to the transfer case or what? THanks for the great sites and the help.

Thanks
Gavin

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Re: Testing transfercase switches to diagnose flashing CDL on Gen III [Re: Fergie] #1057996 03/23/13 12:33 AM
Joined: Jan 2000
Posts: 16,227
off-roader Offline
Web Wheeler
*****
Quote
Hey all,

So I've replace the solenoids and freewheel switch, and still get the flashing CDL. My next step is to test the transfercase switches per this site: http://www.pajeroclub.co.za/forum/viewtopic.php?f=52&t=2077

A few questions though: 1. Should I have the ignition on when I do this?

Not sure.

Quote
2) How do I go about checking the continuity? Do I put one lead of my multimeter on the pin in the switch and the other to the transfer case or what?

No.

The connector should have 2 pins.

Put your multimeter (analog one is easier to read for this) on resistance measurement (ohms) or the Omega symbol.

Put one test lead on each of the connector pins.

The meter should read either 0 or infinite ohms.

With the multimeter leads still in place depress the switch. It should now read the opposite the opposite of what it read before you triggered the switch.

Additionally, with it reading 0 ohms, wiggle the wires around at the switch and the connector while checking if it changes the original reading. If it does, then you may have an intermittent open in the wires. <img src="/forums/images/graemlins/kewl.gif" alt="" />


Off Roader
98 Montero with the Winter Package
89 Montero minty clean and reserved for overlanding trips or Cars and Coffee events
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Re: Testing transfercase switches to diagnose flashing CDL on Gen III [Re: off-roader] #1057997 03/23/13 05:05 PM
Joined: Feb 2013
Posts: 34
F
Fergie Offline OP
Getting the Wheeling Fever
I'll crawl under there and give that a try this morning sometime. I've checked everything else, so it is most likely the t-case switches, but I want to be sure before I go throw money at it.

On a related note, it looks like the switches are on top of the t-case and difficult to get to. Is this the sort of thing where I can remove the rear driveshaft, remove the t-case crossmember and lower the case enough to get the switches in and out?

Re: Testing transfercase switches to diagnose flashing CDL on Gen III [Re: Fergie] #1057998 03/23/13 07:15 PM
Joined: Sep 2012
Posts: 13
Sabre Offline
Need a Spot
Quote
...On a related note, it looks like the switches are on top of the t-case and difficult to get to. Is this the sort of thing where I can remove the rear driveshaft, remove the t-case crossmember and lower the case enough to get the switches in and out?

I haven't done this, but others have said that this is exactly how they've changed out the switches. Good luck, and please follow up with what you discovered!


I could tell you more, but suddenly I am run over by a truck.
-Michael O'Donoghue, "How to Write Good"

Be kind whenever possible. It is always possible.
-the Dalai Lama
Re: Testing transfercase switches to diagnose flashing CDL on Gen III [Re: Fergie] #1057999 03/23/13 07:36 PM
Joined: Mar 2005
Posts: 1,006
P
pcc Offline
Body Damage is Cool
Without a hoist getting at these switches is just about impossible unless you have four hands - even when front wheels are on a ramp. Make sure the dirt has been cleaned off the T-case or it will fall inside when the switch is removed.

If I remember the switch has one wire to it and the circuit is grounded through the body of the switch. If that's the case then you'd test by touching the wire contact and the switch body for continuity as you press the plunger.


92 Montero LS 3.0L V6 Auto, Stock, Original owner, 185,800K miles
Re: Testing transfercase switches to diagnose flashing CDL on Gen III [Re: pcc] #1058000 03/24/13 12:47 AM
Joined: Oct 2003
Posts: 715
socalmonty Offline
Rock Warrior
I'm going to have to check/clean my switches too - I'm getting flashing front tires and flashing rear diff lights (C/D seems normal).

Is there an aftermarket source for the T-case switches and solenoids, or are they $tealership-only??? <img src="/forums/images/graemlins/scared.gif" alt="" />


Sean - Orange County, CA
MAIL: seanwilliams78@gmail.com
1995 Montero SR - For exploring and getting away!
1994 Volvo 850 Turbo - 402hp and counting!
1966 VW Bug 2275cc - For stoplight drags!
Re: Testing transfercase switches to diagnose flashing CDL on Gen III [Re: pcc] #1058001 03/24/13 05:49 AM
Joined: Sep 2012
Posts: 13
Sabre Offline
Need a Spot
Quote
...If I remember the switch has one wire to it and the circuit is grounded through the body of the switch. If that's the case then you'd test by touching the wire contact and the switch body for continuity as you press the plunger.


I developed an error condition when switching to 4HLc & 4LLc (4WD works great) so I took advantage of some rare good weather and crawled under to meter my switches. I'm guessing an internal short in some of the switches since I get an open circuit when there should be continuity but note at the same time that there's continuity between the wire and the body of the t-case (i.e., ground). It's damned confusing...every one of the continuity checks had errors (either cont when there shouldn't be or vice versa).

I'm going to have to see a circuit diagram showing the various operation modes to interpret these results. Otherwise, it's just going to be a matter of biting the $$ bullet and replacing all of them.


I could tell you more, but suddenly I am run over by a truck.
-Michael O'Donoghue, "How to Write Good"

Be kind whenever possible. It is always possible.
-the Dalai Lama
Re: Testing transfercase switches to diagnose flashing CDL on Gen III [Re: Sabre] #1058002 03/25/13 06:01 PM
Joined: Feb 2013
Posts: 34
F
Fergie Offline OP
Getting the Wheeling Fever
Okay, after a nights sleep, I did some figurig to make sure I understand the system properly.

The solenoids receive signals from the 4wd ECU. That signal comes from a switch on the t-case, which in turn comes from the shift lever sensor. So, if the shift lever sends the signal to the t-case switch, but the switch is no good, then it won't send the signal to the solenoid.


Is this correct?

Thanks all








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