Flashing Center Diff Lock Light 200 Series

HGB

Joined
May 29, 2018
Messages
261
Location
In the sand
Couldn’t replicate... got a line about a fault code appearing if they had used the wrong fluid. I don’t need to tell you guys how to feel about that. They noted it on my profile and if (likely when but let’s pray miraculously it does not) or when it returns I can go see them again.
 
Joined
Nov 13, 2019
Messages
3
Location
NthQld
Everything I have researched on this topic suggests suspect sensors in the changeover between Hi to Lo ratio process - just what is involved - directly or indirectly - in that process is anyone's guess. For example, the most annoying effect of this flashing light is that I cannot engage cruise-control.
This suggests to me that it 'thinks' it is in 4Lo , but cannot engage the hardware - esp. given the selector switch is still in 4Hi
According to the local Toyota service guru, when working correctly, the flashing light is intended to indicate an incomplete switch-over between Hi to Lo ratio.....
I was fortunate to be able to get the car into the service bay with the light flashing and it does not throw any error codes on the Toyota full-workshop test equipment.
Toyota recommended 'regular use' of Lo but even when used daily, it will still wake up in flashing mode at any given time.
It is hot and dry here right now and it has not happened for a week or so - my money is on a dodgy earth somewhere in that circuit or a sensor issue.
I can make it turn off by driving over 40kmh and shutting the engine down with the gear selector in N, then shifting to Park to start again.
It will also turn-off by running it to operating temperature and doing the same shut-down routine as above.
 
Joined
Jan 17, 2016
Messages
2,674
Location
Chicago, IL, USA
Couldn’t replicate... got a line about a fault code appearing if they had used the wrong fluid. I don’t need to tell you guys how to feel about that. They noted it on my profile and if (likely when but let’s pray miraculously it does not) or when it returns I can go see them again.
If it started after the fluid change, that sure seems like a likely culprit. I suppose it's possible the new Toyota 75W LF is too slippery, but far more likely they used some generic 75W90 (or other) oil in it since if you read the threads around here most people have found when they as the dealers that they don't have 75W LF and just use whatever gear oil is available.
 
Joined
Jan 31, 2012
Messages
466
Location
Tulsa, OK
I was having the same issue on cold starts. Took it to a gravel parking lot and ran it in 4Lo, then locked the center diff and drove around for ten minutes. It has solved the problem.
 

molanginaeda

SILVER Star
Joined
May 19, 2017
Messages
235
Location
MA
Gremlins.... this morning I experienced similar symptom. CDL light flashing like Christmas light. Happen during driving normal. I can’t shift to 4low. Power off the car several times. The symptom went away after reaching home. I can’t replicate again, but light went away and I can shift to 4low, activate MTS & crawl control.
 
Joined
Sep 5, 2018
Messages
150
Location
Boston MA
Happened twice to my 200 on cold mornings. It went away after a short drive and shut down.

FWIW I have 75w Toyota oil in the transfer case, that I recently changed myself. Happened few days and couple thousand miles after the change as well as once sometime before the change. I have no reason to believe the transfer case had anything else than the factory fill before the change (dealer maintained truck by previous owner, no records of such change).
 
Last edited:
Joined
May 3, 2016
Messages
950
Location
odessa, tx
Mine is now doing this. Flashing both cdl and 4 lo in mornings at random. Goes away once warm and the car is restarted. Did anyone ever figure out the culprit
 
Joined
Nov 1, 2018
Messages
157
Location
Driving
You have to use the CDL frequently and 4lo stuck on for that matter. I try to run both quarterly and the cold start CDL light goes away, and only occasional 4lo. Full factory fluid replacements in both. Restarting solves it every time. It seems like the system check happens once and then triggers the code.
 
Joined
Nov 13, 2019
Messages
3
Location
NthQld
You have to use the CDL frequently and 4lo stuck on for that matter. I try to run both quarterly and the cold start CDL light goes away, and only occasional 4lo. Full factory fluid replacements in both. Restarting solves it every time. It seems like the system check happens once and then triggers the code.
 

BTC

Joined
Nov 25, 2015
Messages
18
Location
Kirkland
This just happened to me this morning in Rock Springs WY on my way home from buying 2014 LC. Drove for a little bit then pulled over and off / on then gone. Kind of disappointing on the second day
 
Joined
May 28, 2019
Messages
490
Location
Houston
I'm convinced it has to do with moisture. Mine usually goes off on cold wet mornings; however, it recently happened when I left the rig idling with the AC blasting on a hot day. I think the condensate water dropped into the TC area and set it off. I've never had it stay on after driving and restarting.
 
Joined
Apr 15, 2017
Messages
3
Location
Saudi Arabia
I'm convinced it has to do with moisture. Mine usually goes off on cold wet mornings; however, it recently happened when I left the rig idling with the AC blasting on a hot day. I think the condensate water dropped into the TC area and set it off. I've never had it stay on after driving and restarting.
So why we faced no issues driving in rainy days?
 

afgman786

SILVER Star
Joined
Feb 19, 2013
Messages
1,722
Location
Gainesville, VA
 
So I've been trying to exercise the CDL on the 200 this month since I've gotten the chance to go wheeling a couple times..

If I try to turn on CDL before turning off VSC it just flashes and nothing happens. If I turn off VSC first then push CDL I get the steady CDL showing its engaged.
Earlier this month I was gone for a weekend, on day 1 turned VSC off and CDL on, then on day2 when I got in the 200 CDL light was still on and said VSC was disabled which I found odd. Well that was a lie. I went to try and pull a stuck rig out and the second I got wheel spin power was cut to the wheels and traction control kicked in.. on day 3 CDL was still on (I didn't try to turn it on or off the day I pulled a rig out). So switched back to 4hi first, then hit CDL and it just started flashing (wasn't actually engaged). Drove a bit to get off the land we were wheeling on and let everything warm up. Then turned the 200 off and back on and no lights.

This past weekend when I went wheeling did the same thing, first turned off VSC then turned CDL on. Turned the 200 off for lunch, after turning back on still said CDL was on and VSC off which was not the case. After airing up and switching to 4hi, hit the CDL button to see what would happen. Flashing CDL again.... turned the car off and back on and it was gone and said it was off.

Question I've got is, I know when you hit CDL it is supposed to turn VSC off then turn CDL on. What connections or wiring should I look into to see where the issue is?
 

lbbest

SILVER Star
Joined
Apr 10, 2012
Messages
56
Location
USA
 
Mine just went off today for the first time in a couple years..the mystery continues
 
Joined
Jan 23, 2019
Messages
782
Location
Florida
I got this after starting it up on a cool morning. There was an evap code, cleared that and it corrected the problem. McG told me about it.
 
Joined
Jan 23, 2019
Messages
782
Location
Florida
I have a cheep code reader similar to this $20 one, plugged it in and cleared the code. My last vehicle needed this code reader alot, LOL

It has not been back since.

McG told me this was a known issue. The evap code causes the diff lock to no longer function.

 
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