I have a 2004 Land Cruiser, with Navigation-- and I get this message when I try to use the heat. The outside temp no longer displays, and I can't use the climate control. All other function on the navigation unit, to include radio, etc. work fine. Thanks for any help you can offer. I have disconnected battery and reconnected-- but that did not clear it.
Check connection of the air conditioner-- NAV Unit
- Thread starter AstRomroMan
- Start date
This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.
- Thread starter
- #2
Can anyone help me with this? Please!
- Thread starter
- #4
Thanks- yes-- I have searched and tried everything mentioned.
- Thread starter
- #7
Thanks-- I found the technical bulletin on that issue. They say to check the connections in the back of the "MFD"-- is there a video that shows how to get the MFD out? I am always afraid of busting up the plastic trim. Thanks!
I was trying to find one of the threads you posted in that was the first one you started. I guess this is it.
radio and amplifier work as normal?
sound out of all speakers?
navigation works as normal? you hear voice prompts?
antenna up and down buttons work as normal?
CDL lock button works as normal?
Hazard button works as normal?
red security light blinks and or stays steady as normal?
You have a red seat belt indicator on the passenger side that works normal? (on or off with weight in the passenger seat)
have you ran a nail file across all the related fuses, passenger, drivers and main fuse boxes?
there are codes after you reset the ACC fuse, what are they? (again)
there is no sign of water coming in on the drivers or passenger side fuse box?
you don't have techstream?
you don't have the factory manual service book?
there are videos on you tube about removing the side panels and removing the four bolts that hold the center assembly in.
you said your screen was inspected and said to be good, so I'd skip anything related to that.
Once the four bolts are out lean the top outward with the bottom resting on the ledge above the ashtray piece. I'll attach a picture if I can find one.
Unplug all ten plugs back there look at them all, look for signs of other people's work. Pay special attention to the 3 AC plugs. The 3 that go into the rectangle back box.
Looking down from the drivers seat with the assembly leaning open a bit, the AC connector that is closest to the passenger side (A47) has a temp wire, pink, in one of the corners. Make sure that looks normal.
From left to right the AC plugs are this,,, A45 (40 pin) A46 (20 pin or so) the middle one, and then A47 20 or so pins furthest to the right.
Has anyone cut back the tape, or any sheathing to expose the wires as they make their way back up to the main harness?
Any colors mismatched or splices you see in any of the wire sets?
If you can answer those and do all that and inspect and report back I can help maybe.
yours won't lean back this much, I use a peice or cord with a coat hanger hook on one end, hooked into the de defrost vent at the lower edge of the windsheld with the other end wrapped around the two top bolt ears that hols the assembly in place. So the rope holds the assembly up and close to the wiring while working.
Or put a towel on the gear shift lever and move it so it doesn't hurt or rest completely on the screen.
radio and amplifier work as normal?
sound out of all speakers?
navigation works as normal? you hear voice prompts?
antenna up and down buttons work as normal?
CDL lock button works as normal?
Hazard button works as normal?
red security light blinks and or stays steady as normal?
You have a red seat belt indicator on the passenger side that works normal? (on or off with weight in the passenger seat)
have you ran a nail file across all the related fuses, passenger, drivers and main fuse boxes?
there are codes after you reset the ACC fuse, what are they? (again)
there is no sign of water coming in on the drivers or passenger side fuse box?
you don't have techstream?
you don't have the factory manual service book?
there are videos on you tube about removing the side panels and removing the four bolts that hold the center assembly in.
you said your screen was inspected and said to be good, so I'd skip anything related to that.
Once the four bolts are out lean the top outward with the bottom resting on the ledge above the ashtray piece. I'll attach a picture if I can find one.
Unplug all ten plugs back there look at them all, look for signs of other people's work. Pay special attention to the 3 AC plugs. The 3 that go into the rectangle back box.
Looking down from the drivers seat with the assembly leaning open a bit, the AC connector that is closest to the passenger side (A47) has a temp wire, pink, in one of the corners. Make sure that looks normal.
From left to right the AC plugs are this,,, A45 (40 pin) A46 (20 pin or so) the middle one, and then A47 20 or so pins furthest to the right.
Has anyone cut back the tape, or any sheathing to expose the wires as they make their way back up to the main harness?
Any colors mismatched or splices you see in any of the wire sets?
If you can answer those and do all that and inspect and report back I can help maybe.
yours won't lean back this much, I use a peice or cord with a coat hanger hook on one end, hooked into the de defrost vent at the lower edge of the windsheld with the other end wrapped around the two top bolt ears that hols the assembly in place. So the rope holds the assembly up and close to the wiring while working.
Or put a towel on the gear shift lever and move it so it doesn't hurt or rest completely on the screen.
Have you looked at your outside temperature sensor? It is located on the passenger side behind the front bumper. You can find it by tracing the connections from the fog light harness to the sensor. My guess is there might not be anything wrong with the connection on the back of the unit, the signal to the unit just might not be there. The sensor plays an important role in the a/c system.
You can see it above the passenger side frame rail in the pic below...
- Thread starter
- #10
Thanks so much for being willing to help me out. I am a newbie, so I may not 100% understand everything. Before I try and answer each of your questions, I wanted to provide a few more background items. I did recently have an issue with my 4-way flashers coming on when I was washing the car. They came on, and I could not get them off, unless I pulled the fuse. I immediately figured I had a water leak issue on the PS. I pulled the floormat, and inspected and saw no wetness. I pulled column and ceiling trim, and did not see any issue with the sunroof drain. I snaked out the drain, and I also poured some water down it, and nothing came into the LC, and all went right to the ground as is should. The DS drain did seem covered up, so I cleared it out. Overall the sunroof track seemed very dry. The 4-way flasher issue resolved itself after a few days, and after I sat car in the sun/wind. I guess I must have a leak someplace, but I could not find it. It was during this issue, when the 4-way flashers would not turn off, when I was driving the LC to try and dry it out, that I noticed my issue with no heat or AC. I have no idea if the issues are related??? Here is my attempt to answer your questions:
radio and amplifier work as normal?-------------yes, but I am not sure what you mean by amplifier-- but radio works
sound out of all speakers?-- I think so, but not certain
navigation works as normal? you hear voice prompts?---- I really never use it, except to display a map-- but if I hit the speaker button on the steering wheel, and same home, the LC says to me---"voice recognition mode is finished".... I just entered my home address and took it for a spin, and when I say home-- it comes on and gives me directions home-- so that is working
antenna up and down buttons work as normal?-------yes
CDL lock button works as normal?---- I do not know how to check this??? all l ocks work-- I did just have the front two actuators replaced with denso brand actuators, as the old ones had failed
Hazard button works as normal?-------------yes they do now, but see my comments above, in case this is a related issue
red security light blinks and or stays steady as normal? ----- yes, it blinks, after I lock the LC
You have a red seat belt indicator on the passenger side that works normal? (on or off with weight in the passenger seat)
have you ran a nail file across all the related fuses, passenger, drivers and main fuse boxes?------- I have used my multi-meeter to test every fuse in the LC, to make sure there is continuity-- and they all test ok
there are codes after you reset the ACC fuse, what are they? (again)---- I am not sure I know how to get these codes-- my son and I ran a diagnostic, by flasing the lights, and got the codes attached to this post, but these are codes after I had pulled the entire navigation and radio unit out-- we then cleared these codes....
there is no sign of water coming in on the drivers or passenger side fuse box?--- no, I have checked this out, and do not see any water-- but this did all seem to start after I washed the car-- so I am wondering?????
you don't have techstream? -----------------no, I do not
you don't have the factory manual service book? ------------no, I do not, but maybe I need to get it-- can you tell me what to buy and best place to get it????
I did recently have the unit out, and all 10 connectors unplugged. The wires all look normal and original. male and female adaptors all looked good-- no obvious signs of issues.
Thanks so much for your help!!!!!!!!!!!!!!!!!
radio and amplifier work as normal?-------------yes, but I am not sure what you mean by amplifier-- but radio works
sound out of all speakers?-- I think so, but not certain
navigation works as normal? you hear voice prompts?---- I really never use it, except to display a map-- but if I hit the speaker button on the steering wheel, and same home, the LC says to me---"voice recognition mode is finished".... I just entered my home address and took it for a spin, and when I say home-- it comes on and gives me directions home-- so that is working
antenna up and down buttons work as normal?-------yes
CDL lock button works as normal?---- I do not know how to check this??? all l ocks work-- I did just have the front two actuators replaced with denso brand actuators, as the old ones had failed
Hazard button works as normal?-------------yes they do now, but see my comments above, in case this is a related issue
red security light blinks and or stays steady as normal? ----- yes, it blinks, after I lock the LC
You have a red seat belt indicator on the passenger side that works normal? (on or off with weight in the passenger seat)
have you ran a nail file across all the related fuses, passenger, drivers and main fuse boxes?------- I have used my multi-meeter to test every fuse in the LC, to make sure there is continuity-- and they all test ok
there are codes after you reset the ACC fuse, what are they? (again)---- I am not sure I know how to get these codes-- my son and I ran a diagnostic, by flasing the lights, and got the codes attached to this post, but these are codes after I had pulled the entire navigation and radio unit out-- we then cleared these codes....
there is no sign of water coming in on the drivers or passenger side fuse box?--- no, I have checked this out, and do not see any water-- but this did all seem to start after I washed the car-- so I am wondering?????
you don't have techstream? -----------------no, I do not
you don't have the factory manual service book? ------------no, I do not, but maybe I need to get it-- can you tell me what to buy and best place to get it????
I did recently have the unit out, and all 10 connectors unplugged. The wires all look normal and original. male and female adaptors all looked good-- no obvious signs of issues.
Thanks so much for your help!!!!!!!!!!!!!!!!!
- Thread starter
- #11
Outside temp sensor-------- I found it and it looked ok. I removed it and cleaned it and I put muy ohm meter on it-- it read about 1.7 at the normal outside temp, about 40 today, and then I put a little heat on it, and it dropped to .9---- I do not know if that is w/in normal specs, or if there is a better way to test it. I put it back in, and nothing has changed.
- Thread starter
- #12
JerrB-- I posted a reply below-- assume you get a notice. One other thought-- in line with what you seem to be thinking-- my son also believes that that one section of the MFD with the buttons and the temp display does not seem to be getting power. Is there a way I can test for that with my multi-meter?
- Thread starter
- #13
These are diagnostic codes I pulled, but this is after the navi unit was removed and reinstalled-- does this help me pinpoint my issue? Thanks--
Last edited:
I guess I must have a leak someplace, but I could not find it. It was during this issue, when the 4-way flashers would not turn off, when I was driving the LC to try and dry it out, that I noticed my issue with no heat or AC.
I'd park it in the garage for two days and leave it before I did anything else.
Taking anything apart isn't going to be worth anything if there is possibly a leak, unless it's to find and fix a leak. It sounds like you have one somewhere.
I'd park it in the garage for two days and leave it before I did anything else.
Taking anything apart isn't going to be worth anything if there is possibly a leak, unless it's to find and fix a leak. It sounds like you have one somewhere.
- Thread starter
- #16
Thanks everyone. Yes-- I have fully researched the PIN 60 issue, and even had the circuit board inspected under a microscope. As far as keeping it dry, it has been in the garage for over 10 days, and my problem still persists. I am really at my wits end. Can anyone interpret those error codes? I just do not know what to try next.
I could but I'm not at home. You need to search all the HVAC codes, diagnostic codes, error codes for AC, use those terms and anything else you think of. A lot of them have been explained before. In you other threads you posted the the actual #s. Those are in the factory books, probably in the free downloadable 2004 version on here.
Were you ever able to find a solution to this problem? I have (I believe) the exact same problem as you are describing. Along with the climate control not working, the defrost buttons and basically the whole lower button section do not work. I even went so far as to purchase another MFD from a salvage yard hoping it would fix the problem (IT DID NOT). So now I have two perfectly functional MFD's if anyone is interested in purchasing one 
. All of the other features of the MFD (radio, nav, menu, etc.) work just fine. Only the climate control is messed up. I feel like it must be a loose wire/connection somewhere but can't seem to locate anything. Thanks
. All of the other features of the MFD (radio, nav, menu, etc.) work just fine. Only the climate control is messed up. I feel like it must be a loose wire/connection somewhere but can't seem to locate anything. Thanks- Thread starter
- #19
My problem was the "AC Amplfier" which is the black plastic unit, right behind the MFD, that has three white female connector sockets. I am pretty sure that is your issue.
