realfixesrealfast asked:
Do your door locks go crazy and activate when you’re driving. Here is a way to find the problem
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door locks
Im guessing computer glitch.speedometer error
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I will try to reset the body control module. Also read on the scanner what speed is when bcm locks and unlocks.
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I ain’t gonna say what I think it might be cause I don’t have enough information on how the system works. I would be curious as to whether there are any speedometer problems along with this given what little info was on this video. The big thing I’m wantin on this is a circuit description and operation from a service information site, such as AllData. Read it, understand it, and develop a diagnostic plan based on the info it gave.
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my guess is a short. on the the next video
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The first thing I would do would be to hit up alldata for a system operation description and any TSB’s. Next, I would probably follow along with epiphaknee’s diagnostic train of thought.
door locks
If I didn’t know any better, seems like you being punked. Someone is following you around with the remote control lmao. Nahh just kidding. I also will go with epiphaknee’s response.
door locks
id suspect faulty wiring. id test using a a power probe
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its a dodge..
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id suspect the bcm then id go to identifix and see if anyone else had the simalar problem and see if theres any short cuts to diagnosing it
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Stop and think about how stupid this is! It’s a problem with the freakin’ electronic door locks. Damn computer. It’s so complicated you need an oscilloscope to fix the damn door locks! I’m disgusted with the s-i-t-u-a-t-i-o-n.
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Problem: Short to power ( feedback ) somewhere in the door lock wiring coming out of the BCM.
Diagnosis: Look at wiring diagram and check for available voltages where it should be, then voltage drop all components in circuit, take all panels off and visually inspect that all locks have no corrosion and bad wires or grounds.
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I like the response by epiphaknee. First step is a wiring diagram, and a quick review of the vehicle looking for other clues. That circuit to lock the doors should be suppressed after the first lock, so the fact it continues says that a feedback loop has lost it’s way. Likely culprit is bad ground at body control module or a bad connection or worn wire.
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I’d say the VSS or related wiring.
I would start by following a wiring diagram.
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I don’t think the locks are supposed to unlock when the vehicle speed drops below 15 mph. I think they are supposed to unlock when shifted back into park. Maybe a faulty PRNDL switch or related circuitry. Any codes?
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I think there is a loose connection in the input circuit to the BCM for the locks that indicates the sliding door is closed. The door is not closing all the way and when you accelerate or turn corners it is losing its contact. A likely problem spot would be where the sliding doors make electrical contact with the B-Pilar. Could be corroded.
door locks
I would disable the automatic lock feature and repeat the road test. During the road test I would observe scan tool data for BCM and RKE status’ hopefully showing an input change
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bad relay,power supply or faulty ecm
door locks
1. Door lock control module.
2. Wiring Diagram
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Body control module. A friend had a Olds 88 with kind of the same problems.
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I had the same problem what I did was that there is a sensor by the latch on the drivers side. I disconnected the wires from it and that solved my problem. Of course now the dome lights do activate when the door is opened nor does the automatic door lock feature work.
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Start with the diagram and trace back eliminating potential causes, speed sensor, steer column switch for park-drive, or wiring short near door hinge. I really doubt it is a faulty computer. My guess (and it is just a guess without evidence) is a wiring short near door hinge.
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Door locks are controlled by the BCM. Check the inputs to the module to see which one is faulty. Door lock switches, door ajar switches / possible door alignment triggering the ajar switch, etc. If they check out then look at BCM door lock output. If it’s not commanding the locks then it’s a short in the circuit (or a bad relay). If it’s the BCM who is actually commanding the locks then it may be a bad BCM or faulty ground. They key is if anything else is flaky like dome lights, etc.
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1. Vehicle speed sensor
2.- Raise the vehicle’s front wheels, connect a scope to the VSS signal output and observe for any glitches or interruptions in the wave pattern as the wheels spin during the test.
Just a guess, thanks again Duane.
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I think it has something to do with a sensor that tells the computer it is in gear or not in gear, I think if it was a speed sensor the speedo would give incorect info also
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Problem: The Body Control Module is either malfunctioning or is not receiving correct information due to: (i) weak battery or connections, (ii) Loose or corroded grounds or other connections, (iii) bad BCM, (iv) bad relay, or, (iv) faulty or misaligned door latches or alignment. Known pattern failure. Process: Inspect all latches and door alignment, then use Power Probe and work towards the BCM. Thanks for these videos Duane they Rock!!