Trace plug-in charging, DC–DC low-voltage support and regenerative energy recovery by comparing source, permission, conversion, acceptance and actual response.
Safety boundary: Conceptual/diagnostic training only. This module does not authorize opening HV charging components, probing energized HV circuits, servicing EVSE infrastructure, defeating interlocks, or using generic values in place of current OEM/EVSE procedures and qualified training.
Separate AC charging through the onboard charger from DC fast charging that supplies controlled DC energy through the vehicle charge path. Architecture determines which conversion stage is active.
Foundation: identify the energy path. Technician: compare command and response. Deep: explain conversion, acceptance and limiting interactions.
The EVSE and vehicle exchange availability, connection and permission information. A connected cable does not prove the vehicle has authorized or accepted energy transfer.
Foundation: identify the energy path. Technician: compare command and response. Deep: explain conversion, acceptance and limiting interactions.
During AC charging the onboard charger converts external AC into controlled DC for the traction battery, subject to BMS, thermal and safety limits.
Foundation: identify the energy path. Technician: compare command and response. Deep: explain conversion, acceptance and limiting interactions.
DC fast charging bypasses the onboard AC conversion stage, but the vehicle still governs allowable battery voltage/current based on SOC, temperature, isolation and pack limits.
Foundation: identify the energy path. Technician: compare command and response. Deep: explain conversion, acceptance and limiting interactions.
The HV-to-low-voltage DC–DC converter supports the 12-V bus and auxiliary loads when commanded. Diagnose source, converter permission and low-voltage response as separate evidence points.
Foundation: identify the energy path. Technician: compare command and response. Deep: explain conversion, acceptance and limiting interactions.
Regen converts vehicle kinetic energy through the traction machine/inverter back toward the HV battery. Available regen depends on traction conditions, battery acceptance, temperature and system limits.
Foundation: identify the energy path. Technician: compare command and response. Deep: explain conversion, acceptance and limiting interactions.
For charging complaints, compare connection/permission, source availability, conversion stage, battery acceptance, thermal state and measured energy flow. Follow OEM and EVSE safety procedures.
Foundation: identify the energy path. Technician: compare command and response. Deep: explain conversion, acceptance and limiting interactions.
Provides AC or DC energy and communicates connection/availability; it is not the same thing as the vehicle charger.
Physical connection and safety/permission states must agree before energy transfer is allowed.
Converts AC input to controlled DC for the HV battery on AC charging architectures.
External equipment performs major AC-to-DC conversion; vehicle controls still limit accepted energy.
Determines charge acceptance using SOC, temperature, cell limits and protection states.
Transfers HV-bus energy to the low-voltage bus to support 12-V loads and battery charging.
Reverses propulsion energy flow during deceleration when control and battery limits permit.
Charging and regen rates can be reduced by battery, charger, inverter or cooling limits without a failed power component.
Normalized fictional teaching indices only—not OEM specifications or charge limits.
Select a state.
Identify vehicle architecture, charging complaint, source type and HV/EVSE safety boundary.
Preserve DTC/status/freeze-frame evidence; verify 12-V support, connection state and charge/READY permissions.
Compare source availability with commanded and actual charge power/current using supported data.
Localize the first mismatch among EVSE/source, inlet/permission, onboard/DC-fast conversion path, battery acceptance, DC–DC output or regen path.
Follow current OEM/EVSE procedures for the isolated branch; stop/escalate for HV, isolation, connector damage, overheating or infrastructure faults.
After authorized repair, reproduce the original condition and verify permission, energy transfer, low-voltage support and battery response agree.
EVSE reports available power and the inlet is connected, but vehicle charge permission is denied while a relevant interlock/status input is implausible.
Evidence gate: Do not condemn the onboard charger from zero power alone. Resolve the permission/interlock branch using OEM evidence first.
Source remains available, but battery temperature rises and BMS allowable charge current falls with actual current.
Evidence gate: Commanded/allowable current falling with temperature supports a controlled thermal/acceptance limit rather than an external-source failure.
HV system is permitted and stable, but low-voltage bus support remains low while DC–DC output command is present.
Evidence gate: Localize the next branch to DC–DC conversion/output or its low-voltage path; HV battery SOC alone does not prove 12-V support.
Friction braking is available, but requested regenerative torque is limited while battery charge acceptance is near its upper constraint.
Evidence gate: Regen needs a destination for recovered energy. Battery acceptance can legitimately limit regen without a motor/inverter failure.
Select Start.
Instructor-observed evidence required; online completion alone is not a practical competency claim.
Instructor-observed evidence required; online completion alone is not a practical competency claim.
Instructor-observed evidence required; online completion alone is not a practical competency claim.
Instructor-observed evidence required; online completion alone is not a practical competency claim.
Instructor-observed evidence required; online completion alone is not a practical competency claim.
Instructor-observed evidence required; online completion alone is not a practical competency claim.
This is a new first-pass 16.5 module. Existing charging, regenerative-braking, architecture, battery/BMS and inverter resources are preserved as supporting context, not represented as a previously completed 16.5 course.