{"version":"1.0.0","episode":{"title":"346: Tesla Model Y Charging Disabled Diagnostic","url":"http://getcarcurious.com/episodes/346-tesla-model-y-charging-disabled-diagnostic","audioUrl":"https://www.buzzsprout.com/809423/episodes/18965900-346-tesla-model-y-charging-disabled-diagnostic.mp3","description":"This week on the show I follow up on the 2021 GMC Yukon from last week's episode along with a diagnostic on a 2021 Tesla Model Y that's not charging. See the links below for more details. HVIL Training doc- https://static.nhtsa.gov/odi/tsbs/2014/SB-10052449-4313.pdf Service mode document- https://service.tesla.com/docs/Public/ServiceMode/service_mode_user_guide.pdfWebsite- https://autodiagpodcast.com/Facebook Group- https://www.facebook.com/groups/223994012068320/YouTube- https://www.youtube.com/@automotivediagnosticpodcas8832Email- STmobilediag@gmail.comPlease make sure to check out our sponsors!SJ Auto Solutions- https://sjautosolutions.com/Automotive Seminars- https://automotiveseminars.com/L1 Automotive Training- https://www.l1training.com/Autorescue tools- https://autorescuetools.com/  "},"annotations":[{"startTime":128.9,"endTime":155.5,"type":"part","title":"instrument cluster","url":"/glossary/instrument-cluster","quote":"Now, when I ended the episode, we still had to go back to that vehicle one more time to program a brand new instrument cluster.","canonicalId":"part:instrument-cluster","priority":0.9,"confidence":0.9,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"The instrument cluster is the vehicle’s gauge/dash display module (speedometer, tachometer, warning lights). When it’s replaced, it often requires programming and authentication so it matches the vehicle’s configuration.","simplifiedExplanation":"The instrument cluster is the dashboard with the gauges and warning lights. If it’s replaced, the car usually needs to “learn” it and verify it’s the right part before it will work correctly."}},{"startTime":170.2,"endTime":177.5,"type":"term","title":"ECU","url":"/glossary/ecu","quote":"...aired out on the cluster P16 as the ECU at the air for the S-stack...","canonicalId":"term:ecu","priority":0.9,"confidence":0.9,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"ECU stands for Electronic Control Unit, a computer that controls vehicle functions. In diagnostics, the ECU is often the target for programming/authentication steps and can be involved in security failures.","simplifiedExplanation":"An ECU is the car’s computer that controls systems. During diagnostics, it’s often the component the scan tool is trying to talk to or program."}},{"startTime":185.48,"endTime":190.0,"type":"concept","title":"GM Tech Support","url":"/glossary/gm-tech-support","quote":"we actually called GM Tech Support on this because we're following things to the letter as the Service Bolton and Service Information suggests on these GM Global Bs","canonicalId":"concept:gm-tech-support","priority":0.9,"confidence":0.9,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"GM Tech Support is the manufacturer’s technical hotline that dealers and certified technicians use for diagnostics. In this segment, they’re following GM’s prescribed diagnostic workflow and trying manufacturer-backed troubleshooting steps.","simplifiedExplanation":"This is GM’s official help line for diagnosing problems. Instead of guessing, the shop asks GM what steps to follow for that exact issue."}},{"startTime":212.2,"endTime":218.7,"type":"concept","title":"replace that module after checking it for updates","url":"/glossary/replace-that-module-after-checking-it-for-updates","quote":"And according to GM documentation, if it passes without said module, well, you replace that module after checking it for updates. That's what we did.","canonicalId":"concept:replace-that-module-after-checking-it-for-updates","priority":0.5,"confidence":0.85,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"This describes GM’s diagnostic logic: first verify whether the module has software updates that could fix the fault, then replace the module if the issue persists. It’s common with electronic modules because many “hardware” problems are actually software/firmware issues.","simplifiedExplanation":"Before replacing a part, the shop checks if the computer software needs an update. If updating doesn’t fix it, then replacement may be the next step."}},{"startTime":229.8,"endTime":236.9,"type":"term","title":"Ethernet connection","url":"/glossary/ethernet-connection","quote":"One suggestion they made was to use Ethernet connection to the MDI2 rather than a USB cable.","canonicalId":"term:ethernet-connection","priority":0.9,"confidence":0.9,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"Ethernet connection here refers to using the vehicle’s Ethernet-based diagnostic/data interface rather than a USB connection. Some newer vehicle systems and diagnostic tools require Ethernet for reliable communication with certain modules or networks.","simplifiedExplanation":"They’re talking about using a different type of connection—Ethernet instead of USB—to talk to the car’s computers. Some cars won’t communicate properly unless you use the right connection type."}},{"startTime":233.0,"endTime":236.9,"type":"term","title":"USB cable","url":"/glossary/usb-cable","quote":"One suggestion they made was to use Ethernet connection to the MDI2 rather than a USB cable. And I think I mentioned in the episode last week...","canonicalId":"term:usb-cable","priority":0.5,"confidence":0.7,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"Using a USB cable is the alternative connection method to Ethernet for the diagnostic interface. In this case, the technician tried USB and Ethernet and the diagnostic result didn’t change, which helps narrow down the cause.","simplifiedExplanation":"They tried connecting the diagnostic tool with a USB cable. When switching to Ethernet didn’t help either, it suggests the issue isn’t just the connection type."}},{"startTime":352.3,"endTime":372.6,"type":"concept","title":"service bulletin","url":"/glossary/service-bulletin","quote":"...where it's not a service bulletin and you might not be able to find it in aftermarket service information, but it's there...","canonicalId":"concept:service-bulletin","priority":0.9,"confidence":0.9,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"A service bulletin is an official manufacturer update that describes a known issue and the recommended diagnostic/repair steps. It’s typically published for dealers and may not be immediately available in aftermarket repair databases.","simplifiedExplanation":"A service bulletin is like the factory’s “known problem” memo. It tells mechanics what’s going wrong and what to do to fix it, usually first for dealerships."}},{"startTime":366.5,"endTime":372.6,"type":"concept","title":"aftermarket service information","url":"/glossary/aftermarket-service-information","quote":"...it's not a service bulletin and you might not be able to find it in aftermarket service information, but it's there...","canonicalId":"concept:aftermarket-service-information","priority":0.5,"confidence":0.8,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"Aftermarket service information refers to third-party repair databases and manuals used by independent shops. Some OEM-only documents (like internal technical notes) may never make it into these resources."}},{"startTime":378.3,"endTime":384.5,"type":"concept","title":"OE subscription","url":"/glossary/oe-subscription","quote":"...if you're paying for a OE subscription, I don't even know that I would have been able to find this General Motors document...","canonicalId":"concept:oe-subscription","priority":0.5,"confidence":0.7,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"An OE (original equipment) subscription refers to paid access to manufacturer diagnostic/service information systems. The speaker notes that even with this access, some internal documents may be hard to find unless you’re in the right OEM workflow.","simplifiedExplanation":"An OE subscription is paid access to the carmaker’s official diagnostic and service info. Some internal documents may still be difficult to locate even with that access."}},{"startTime":384.5,"endTime":390.9,"type":"brand","title":"General Motors","url":"/glossary/general-motors","quote":"...I don't even know that I would have been able to find this General Motors document because it looked like it was through some sort of internal technician forum...","canonicalId":"brand:general-motors","priority":0.5,"confidence":0.9,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"General Motors (GM) is the OEM whose internal document and diagnostic context the speaker is discussing. The episode’s theme is GM-style dealer/OEM processes for diagnosing module replacement and configuration issues.","simplifiedExplanation":"General Motors is the car company behind the document being discussed. The takeaway is that GM’s internal diagnostic info can include steps that aren’t widely available elsewhere."}},{"startTime":467.5,"endTime":473.0,"type":"concept","title":"module replacement","url":"/glossary/module-replacement","quote":"...if you would attempt to replace another module and do an SDAC, you're probably going to run into the same issue...","canonicalId":"concept:module-replacement","priority":0.5,"confidence":0.85,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"Module replacement in modern cars often requires more than swapping hardware—it can require configuration, programming, and security alignment so the new module can “join” the vehicle network. The speaker warns that attempting to replace another module and run SDAC could reproduce the same issue.","simplifiedExplanation":"Replacing a module isn’t always a simple swap-and-go. The new part may need to be programmed and approved by the car’s systems, or it can still fail."}},{"startTime":582.2,"endTime":601.9,"type":"concept","title":"wiring diagrams with Tesla","url":"/glossary/wiring-diagrams-with-tesla","quote":"...I've learned a little bit about the wiring diagrams with Tesla, the service information, and the tooling...","canonicalId":"concept:wiring-diagrams-with-tesla","priority":0.5,"confidence":0.75,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"Wiring diagrams are schematics that show how power, ground, and communication lines connect to modules. The speaker emphasizes that learning Tesla service information and wiring diagrams helps them troubleshoot faults efficiently, especially when dealing with module communication and connector-related issues.","simplifiedExplanation":"Wiring diagrams are maps of how the car’s wires connect. For troubleshooting, they help you figure out where power, ground, and signals should go when something isn’t working."}},{"startTime":582.2,"endTime":587.7,"type":"term","title":"LIN","url":"/glossary/lin","quote":"...It's power, ground, and lin. There's a runk actuator that's not operating...","canonicalId":"term:lin","priority":0.5,"confidence":0.85,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"LIN (Local Interconnect Network) is a low-speed automotive communication bus used for body electronics and sensor/actuator networks. The speaker mentions LIN alongside power and ground when describing a parking sensor fault, indicating how Tesla diagnostics may involve checking communication lines too.","simplifiedExplanation":"LIN is a type of communication wiring the car uses to let modules talk to small devices. If a sensor isn’t working, the problem can be power/ground—or the communication line like LIN."}},{"startTime":633.9,"endTime":640.8,"type":"term","title":"Tesla Toolbox","url":"/glossary/tesla-toolbox","quote":"...You can also just get Tesla Toolbox and it's expensive. I think it's like $100 a day...","canonicalId":"term:tesla-toolbox","priority":0.5,"confidence":0.9,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"Tesla Toolbox is Tesla’s official diagnostic software/tooling used to communicate with the vehicle and run service functions. The speaker notes it’s expensive and typically purchased only when necessary, contrasting it with cheaper aftermarket cable solutions.","simplifiedExplanation":"Tesla Toolbox is Tesla’s official diagnostic software. It can be pricey, so the speaker sometimes relies on other tools/cables instead."}},{"startTime":665.2,"endTime":818.2,"type":"term","title":"service mode","url":"/glossary/service-mode","quote":"limitations to it, but putting the car into service mode and just using the infotainment pad on the center of the dash to get the information that you need.","canonicalId":"term:service-mode","priority":0.9,"confidence":0.9,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"Service mode is a special diagnostic/maintenance state that lets technicians access deeper vehicle information and system controls than normal consumer settings. On Tesla vehicles, it’s commonly used to read fault information and troubleshoot issues like charging faults.","simplifiedExplanation":"Service mode is a hidden diagnostic mode for the car. It lets a technician look deeper into what the car is doing and why something like charging might be failing."}},{"startTime":671.3,"endTime":676.7,"type":"term","title":"trouble codes","url":"/glossary/trouble-codes","quote":"And you can get the trouble codes and you can actually get into some of the systems and figure out what's going on with the car.","canonicalId":"term:trouble-codes","priority":0.9,"confidence":0.9,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"Trouble codes are stored diagnostic fault identifiers that point to which system detected a problem. In EVs, reading trouble codes helps narrow down whether the charging failure is related to the charge port, onboard charging components, wiring, or other modules.","simplifiedExplanation":"Trouble codes are like the car’s error messages. They help you figure out what system is having the problem instead of guessing."}},{"startTime":693.7,"endTime":713.3,"type":"term","title":"quarter panel","url":"/glossary/quarter-panel","quote":"...there was some body work done to a quarter panel. There was a subframe that was replaced...","canonicalId":"term:quarter-panel","priority":0.5,"confidence":0.7,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"A quarter panel is the body skin over the rear wheel area, and it often involves structural and wiring-adjacent components during repairs. Damage or replacement work around the quarter panel can affect nearby systems, including EV charging-related wiring and connectors.","simplifiedExplanation":"The quarter panel is part of the car’s outer body near the rear wheel. If it’s replaced after an accident, it can also disturb nearby parts and wiring that the car depends on."}},{"startTime":801.1,"endTime":812.7,"type":"concept","title":"large language model","quote":"I'll throw it into a large language model and then as I'm working I can just ask that language model questions about the PDF as I'm trying to figure stuff out...","canonicalId":"concept:large-language-model","priority":0.2,"confidence":0.6,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"The host describes using a large language model to interact with the service-mode PDF while troubleshooting. This is an emerging workflow: turning long technical documentation into a more conversational reference to speed up diagnosis and reduce missed steps.","simplifiedExplanation":"They’re using an AI tool to help read and ask questions about the service instructions. The goal is to get answers faster while they’re figuring out what’s wrong."}},{"startTime":1034.3,"endTime":1045.5,"type":"concept","title":"contactors","url":"/glossary/contactors","quote":"...it does show the batteries at zero percent but it is not closing the contactors which is not going to allow you to charge the battery even if the charger is plugged in...","canonicalId":"concept:contactors","priority":0.9,"confidence":0.9,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"In an EV, contactors are electrically controlled switches that connect and disconnect the high-voltage battery to the rest of the system. If the contactors won’t close, the vehicle typically blocks charging and/or driving for safety.","simplifiedExplanation":"Contactors are like heavy-duty electrical switches in an EV. If they don’t close, the car won’t let electricity flow, so charging won’t start."}},{"startTime":1062.2,"endTime":1067.8,"type":"part","title":"charge port itself","url":"/glossary/charge-port-itself","quote":"...they had actually replaced the charge port itself and I did do a visual on that just to make sure okay as everything plugged in and the connector was a little bit wonky...","canonicalId":"part:charge-port-itself","priority":0.5,"confidence":0.8,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"The charge port is the physical inlet where the EV charging connector plugs in, and it can include sensors and interlock-related hardware. Replacing it suggests the diagnostic process suspected a mechanical/connector issue affecting charging authorization.","simplifiedExplanation":"The charge port is the opening where you plug in the charger. If it’s faulty or the connector isn’t sitting right, the car may refuse to start charging."}},{"startTime":1081.4,"endTime":1086.4,"type":"term","title":"high voltage section","url":"/glossary/high-voltage-section","quote":"...within the service mode and within the high voltage section there was an option to view the H VIL...","canonicalId":"term:high-voltage-section","priority":0.5,"confidence":0.7,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"The “high voltage section” refers to the part of the Tesla diagnostic interface focused on the EV’s high-voltage system. It’s where the technician can view interlock-related data like HVIL to determine why charging is disabled."}},{"startTime":1109.3,"endTime":1119.3,"type":"concept","title":"12 volt circuit","url":"/glossary/12-volt-circuit","quote":"...what this H VIL circuit is it is a loop of a 12 volt wire and connections and some resistors but it's a 12 volt circuit okay so this is not a high voltage circuit but it is...","canonicalId":"concept:12-volt-circuit","priority":0.5,"confidence":0.85,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"Even though it’s called “high voltage interlock,” the HVIL circuit itself is described here as a 12-volt loop with connections and resistors. That distinction matters diagnostically because you’re looking for an interlock open/short condition, not a high-voltage fault directly.","simplifiedExplanation":"The safety loop (HVIL) uses low voltage—about 12 volts—even though it’s related to the high-voltage system. So the fault you’re chasing is about the safety wiring/contacts, not the main battery power."}},{"startTime":1379.5,"endTime":1385.1,"type":"term","title":"terminating resistors","url":"/glossary/terminating-resistors","quote":"[1372.6s]  8.8 volts and then through the components and it shows you on the screen which components\n[1379.5s]  have terminating resistors or I keep saying terminating resistors they're just resistors\n[1385.1s]  okay they're they're this is not a can network so um","canonicalId":"term:terminating-resistors","priority":0.5,"confidence":0.8,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"Terminating resistors are resistors placed at the ends of a circuit path to set expected electrical behavior and help the system verify continuity or presence of components. In EV safety loops like HVIL, the ECU can use these resistor values to confirm the circuit state.","simplifiedExplanation":"A terminating resistor is like a built-in “signal conditioner” in a circuit. The car looks for the right resistance value to know the safety loop is connected correctly."}},{"startTime":1385.1,"endTime":1391.6,"type":"term","title":"CAN","url":"/glossary/can","quote":"[1385.1s]  okay they're they're this is not a can network so um but for whatever reason unless he's 60 ohms\n[1391.6s]  I think cans but it shows you which ones have the 60 ohm resistors within them okay","canonicalId":"term:can","priority":0.5,"confidence":0.75,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"CAN (Controller Area Network) is a common in-vehicle communication bus used to exchange data between modules. The transcript notes the circuit being discussed isn’t CAN, implying it’s a direct electrical safety/interlock check rather than data messaging.","simplifiedExplanation":"CAN is the “conversation system” between car computers. Here, the speaker is saying the issue they’re diagnosing isn’t happening through that normal data conversation."}},{"startTime":1424.2,"endTime":1431.8,"type":"term","title":"12 volt connection","url":"/glossary/12-volt-connection","quote":"[1418.1s]  the direction that it leaves out of the high voltage battery and then to the rear unit now\n[1424.2s]  the rear drive inverter unit it shows you going in on a 12 volt connection to the rear drive unit\n[1431.8s]  okay","canonicalId":"term:12-volt-connection","priority":0.5,"confidence":0.8,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"Even in EVs with high-voltage systems, many control modules and safety circuits use the 12V electrical system. The transcript describes the HVIL-related path involving a 12V connection into the rear drive inverter unit.","simplifiedExplanation":"EVs still use a 12-volt battery for controls and electronics. The speaker is pointing out that this part of the diagnostic/safety setup uses a 12V feed."}},{"startTime":1512.8,"endTime":1517.6,"type":"term","title":"voltage drop","url":"/glossary/voltage-drop","quote":"[1512.8s] resistor in series you're going to have a voltage drop and again what's cool here","canonicalId":"term:voltage-drop","priority":0.5,"confidence":0.85,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"A voltage drop is the reduction in voltage across a component or section of a circuit. By comparing expected voltage drops at different points, diagnostics can pinpoint the location of a break or missing resistance.","simplifiedExplanation":"Voltage drop is the “loss of electrical pressure” as electricity passes through parts. If the drop isn’t where it should be, you can suspect a bad connection or component."}},{"startTime":1522.2,"endTime":1531.5,"type":"term","title":"resistance to the ground","url":"/glossary/resistance-to-the-ground","quote":"[1522.2s] you should have this much resistance to the ground here you should have this much resistance to ground [1531.5s] here","canonicalId":"term:resistance-to-the-ground","priority":0.5,"confidence":0.78,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"“Resistance to ground” refers to how much the circuit resists current flow to the vehicle’s ground reference. Measuring expected resistance/voltage-to-ground at specific test points helps confirm whether the circuit is intact or has an open/short.","simplifiedExplanation":"Ground is the reference point the car uses for electrical circuits. If the resistance to ground isn’t what it should be, it can mean the circuit is open or not connected correctly."}},{"startTime":1614.5,"endTime":1621.4,"type":"concept","title":"high voltage battery and the rear drive units","url":"/glossary/high-voltage-battery-and-the-rear-drive-units","quote":"[1614.5s] and i need to look between the high voltage battery and the rear drive units it's the first thing in line","canonicalId":"concept:high-voltage-battery-and-the-rear-drive-units","priority":0.5,"confidence":0.7,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"The speaker is narrowing the diagnostic search to the wiring path between the high voltage battery and the rear drive units (the components that power the rear wheels). In EVs, the HV battery-to-drive wiring and sensing/termination elements are critical; faults there can prevent charging or trigger HV system warnings.","simplifiedExplanation":"They’re focusing on the wiring between the big battery and the rear power components. If something in that path is wrong, the car may not be able to charge or may refuse to operate safely."}},{"startTime":1710.5,"endTime":1755.9,"type":"term","title":"training","url":"/glossary/training","quote":"...there's training material out there... if you're gonna go work on high voltage stuff do make sure that you've taken the training... there is a potential to hurt yourself...","canonicalId":"term:training","priority":0.5,"confidence":0.9,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"The speaker stresses that high-voltage work should only be done after completing proper training. This is important because EV safety systems (like interlocks and contactors) can still present hazards even when protections are in place."}},{"startTime":1734.1,"endTime":1745.6,"type":"term","title":"high voltage diagnostics","url":"/glossary/high-voltage-diagnostics","quote":"...i'll take on another tesla high voltage diagnostics now i'm sure there's way more way more to it than that right...","canonicalId":"term:high-voltage-diagnostics","priority":0.5,"confidence":0.7,"source":"hybrid-fuzzy+gpt-5.4-nano","data":{"explanation":"High-voltage diagnostics are procedures used to test EV power systems (battery, interlocks, connectors, and related sensors) to determine why charging or power flow is disabled. The speaker emphasizes that understanding the system reduces the initial intimidation factor.","simplifiedExplanation":"High-voltage diagnostics are the steps techs use to figure out why an EV’s battery system won’t charge or turn on. It’s basically troubleshooting the big electrical parts safely."}}],"speakers":[{"id":"s1","name":"Sean Tipping","role":"host"}],"transcripts":[{"url":"http://getcarcurious.com/episodes/346-tesla-model-y-charging-disabled-diagnostic/transcript.vtt","type":"text/vtt"}]}