I've lost the instrument cluster display and have a trouble code of P1689. According to the ODB II code reader it's "Manufacturer Control Auxiliary Inpits Auxiliary Outputs". I have no idea what this means. Can you help?
P1689 No Communication between ECM & Ins
P1689 - Indicates a Data link failure between ECM and fuel injection pump. Low power, engine dereated or engine stops.
POSSIBLE CAUSES:
Hope this helps. Check the fues box under the hood and under the dash on the drivers side. Look for any bad corrosion or bad fuses.
There is a connection in the back of the instrument cluster right in the center. Your going to have to remove the cluster from the dash, most of the time where the wire harness connects to the cluster, The solder goes bad and needs to be re soldered.
If everything else is doing it's job, then it's just that easy fix, Once and a while a good thump to the cluster brings it back to life but not to hard that you break something.
I believe the connector is red in color the last time i fixed my dad's Caravan. Between dad and dodge, i can never keep the dirt away from under my finger nails. LOL
Good luck and keep me posted.
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Same symptoms here. Dash display goes out or is intermittent. Thumping the dash by the temperature control slider can fix this temporarily. Problem in my van was a faulty / overheated ground connector pin in the connector assembly (1 of 2 on panel back) which due to heat had oxidized and was not connecting properly. Re-soldering may fix, but the overheating in my case caused the connector to the rear of the temp control panel to melt away a bit from the pin. Problem just got worse over time. Replacement of temp control / defrost dash panel and rear harness connector needed - got from wrecker for a few bucks - but you have to solder the new connector assembly in. Not a small job, and finicky for some.
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Thank you Molson02536, I found that too but the symptoms I'm seeing don't match. I lost the instrument cluster and the van starts and runs fine. I've pulled and reseated every fuse in the interior block also replace the instrument cluster fuse.
OK, that makes sense. I've been doing a lot of reading about this online and have found this solution has worked for others as well. Strange, I started the van yesterday and, low & behold the instruments worked fine. We decided to rent a van for an upcoming trip to upstate NY so this is not as urgent a problem. I plan to pull the dash apart after returning from NY and have a friend who does my electronics work, I'll have him check out the connectens and repair if necessary. Will let you know. Thanks so much for your advice!!...Wes
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