Parasitic drain of battery

Raymond Owner/Technician Louisiana Posted   Latest   Edited  
Unsolved
Electrical
2014 Dodge Durango Limited 3.6L (ERB) 8-spd
Network Wakes Up Continously Until Battery Drained

Network wakes up after key removed and doors are locked in cycles of about 40 seconds and will continue until battery drains. Disconnected both door control modules, but it continues. Radio Frequency Module disconnected from network - issue persists. BCM replaced with used unit and programmed to vehicle - issue persists. New BCM on backorder from manufacturer.

Cannot find a description of operation as to what can wake up network causing drain. Have star can ihs tp connector and star can c ip connector exposed and have disconnected modules from network with no success. Also isolated lin bus modules. Any suggestions?

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Justin Mechanic
Tennessee
Justin
 

[REMOVED]

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Bruce Owner/Technician
Pennsylvania
Bruce
 

Best to check voltage drop across the fuses instead of pulling them, after a good inspection of all body functions. When it comes to that it's best to open all doors and trip the latches so diagnostics is possible without waking up the network

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Francisco Diagnostician
Mexico
Francisco
 

In these jeep/dodge pulling fuses can lead you in the wrong path very quickly​.​by pulling fuses you keep the network awake/active,its like resetting so to speak​.​also by pulling one fuse one by one, you will see that the drain will never totally disappear,it will decrease some ,but still not completely​.​sometimes two or three fuses have to be pulled in…

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Bruce Owner/Technician
Pennsylvania
Bruce
   

Check all body functions for proper operation, Even park circuits in the wiper system having a fault and continuously trying to complete it's cycle will do that.

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Geoff Diagnostician
Hawaii
Geoff
 

found this: "The CAN-IHS bus network remains active until all nodes on that network are ready for sleep. This is determined by the network using tokens in a manner similar to polling. When the last node that is active on the network is ready for sleep, and it has already received a token indicating that all other nodes on the bus are ready for sleep, it broadcasts a bus sleep acknowledgment…

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Jole Technician
Idaho
Jole
 

I had a 14 dodge journey doing almost the exact same thing your describing. Instrument cluster would wake up like you pushed the start/stop button. After many hours of chasing modules and disconnecting communication lines. I opted to have the vehicle reflashed with all latest software updates and it resolved my problems. Hope this helps.

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Raymond Owner/Technician
Louisiana
Raymond
 

Which modules did you reflash? The ic wake up is exactly what this is doing - bcm is the gateway of network and it has been reflashed.

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Jole Technician
Idaho
Jole
 

I believe it was the instrument cluster, radio, bcm, and pcm all had updates. It was a few years ago sorry dont remember exactly.

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Caleb Diagnostician
Indiana
Caleb
 

Have a few questions. You have isolated EVERY module on the vehicle with no change? Thats impossible. If every module was isolated then the network voltage would be 0 on all network circuits. Either there is still a module plugged in that is the culprit or there is an aftermarket device plugged in somewhere. Also when disconnecting modules at the star connectors, do not reconnect them even if…

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Andy Technician
Arizona
Andy
   

What is the quiescent current consumption when measured at the battery? As Bruce Smeltzer suggested, I would test at each fuse to isolate the circuits that are creating the draw (see chart below). If necessary, a thermal camera can be used to identify offending components in the affected circuits.

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Timothy Owner/Technician
Wisconsin
Timothy
 

How many amps is the parasitic load? And, how long does it take to drain the battery? Whether you've got the network disconnected, does not prevent the system from drawing power. If the node that needs the sleep message is disconnected, then it may never go to sleep. The fuse draw test is nice, but it is far from accurate. It depends on the meter used for the testing. Less expensive meters have…

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Francisco Diagnostician
Mexico
Francisco
 

I agree it is not 100% accurate​.​my fluke reads in millivolts and even then it's a battle to figure out what fuse is consuming milliamps/amps​.​if it's in the amps then it's more noticeable.

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Jason Mobile Technician
Texas
Jason
 

Hey Raymond, all this info is excellent advice and just wanted to see if you checked for dealer installed GPS interruptor and have you noticed any other aftermarket equipment installed? I've seen these starter disablers cause a system to malfunction depending on where it taps in for power, sometimes the actual GPS module goes bad and if any module can wake the system up with a message then it…

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Randy Diagnostician
Colorado
Randy
 

In addition to what has already been mentioned, I would look for an aftermarket device on the bus . I see more and more of these devices causing issues. I find them by watching the bus with a can sniffer and looking for a module that shouldn't be there. Usually they are making a generic data request. Do you have a scan tool that can monitor bus activity without making any requests?

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Andy Technician
Arizona
Andy
 

Which ‘CAN Sniffer’ are you using? Most of the communication networks on the vehicles I see are isolated from the DLC.

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Randy Diagnostician
Colorado
Randy
 

Vehicle Spy from Intrepid. Good point, I thought I was clear but for most aftermarket devices they are wired into the bus going to the DLC and those are the ones I was addressing. Sometimes you can see the wires coming out of the back of the DLC, sometimes they are wired elsewhere and hard to find.

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Andy Technician
Arizona
Andy
 

Wow - $5K for a one year license? How do you recover that investment? I'll stick to my DLC BOB and Lab Scope! Thank You.

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Randy Diagnostician
Colorado
Randy
 

I don’t pay near that. Not sure what you saw but they do have a lot of products. It’s a necessary tool for me but not saying it would be for you. The value package is $495 and includes 6 months. Then you have to buy software. I wasn’t recommending it, just answering your questions.

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Thanks