Body electrical after a collision
Separate visible body damage from power, ground, wiring, network and module effects.
Body Electrical, Restraints & Collision-Related Systems
Connect collision evidence to body electrical, network, restraint and post-repair system decisions. Diagnose the failed function before condemning a module, sensor or restraint component.
Safety boundary: This fictional teaching module does not authorize SRS/pyrotechnic handling, deployment-loop testing, component reuse, bypassing, probing or disposal. Follow current OEM procedures, required waiting times, approved equipment and qualified-service rules.
7 Mini-Lessons
BCM, gateways & distributed I/O
Understand how switches, sensors, modules and networks cooperate to operate body functions.
SRS architecture & deployment evidence
Recognize control modules, impact/occupant sensing, airbags and pretensioners as an integrated restraint system.
Collision-damaged wiring & connectors
Use routing, pin fit, grounds, splices and harness condition as evidence before replacing electronics.
Scan, network & configuration evidence
Correlate DTCs, module communication, deployment records/status and configuration requirements.
Post-repair dependencies
Connect structural repair, glass, closures, steering/alignment and sensor mounting to downstream scans/calibrations.
Verification & documentation
Prove warnings, body functions, network status and required post-repair procedures are complete before release.
8-Part Systems Explorer
Power & grounds
Trace this domain from collision evidence through electrical/restraint consequences and required verification.
BCM / body I-O
Trace this domain from collision evidence through electrical/restraint consequences and required verification.
CAN/LIN networks
Trace this domain from collision evidence through electrical/restraint consequences and required verification.
Harnesses & connectors
Trace this domain from collision evidence through electrical/restraint consequences and required verification.
SRS / pretensioners
Trace this domain from collision evidence through electrical/restraint consequences and required verification.
Occupant & crash sensing
Trace this domain from collision evidence through electrical/restraint consequences and required verification.
Configuration / calibration
Trace this domain from collision evidence through electrical/restraint consequences and required verification.
Post-repair verification
Trace this domain from collision evidence through electrical/restraint consequences and required verification.
Collision → Electrical / Restraint Evidence Lab
Select a normalized teaching state. Values are reasoning indices—not voltage specifications, resistance limits, deployment thresholds or OEM service values.
Power / network evidence
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Body-function evidence
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Restraint evidence
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Release confidence
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Choose a state.
6-Step Post-Collision Diagnostic Workflow
- Verify collision history, customer complaint, warning indicators and affected body functions
- Establish safety/authorization boundaries and retrieve current OEM collision/SRS/post-repair procedures
- Verify 12-V power, grounds and network communication before interpreting downstream module faults
- Scan required modules and correlate DTC/status evidence with harness, connector, sensor, restraint and structural repair areas
- Prove the failed function or required post-collision action before replacing/programming/calibrating components
- Perform required post-repair scan/configuration/calibration checks, verify functions/warnings, and document release evidence
4 Evidence-Gated Cases
Case 1: Many body warnings after repair
Several modules report low-voltage/communication history after a collision repair; multiple body functions are intermittent.
Best branch: 12-V/network foundation. Prove supply, grounds and communication before condemning multiple modules.
Case 2: Door functions fail after side repair
Window, lock and mirror functions on one repaired door are inoperative while the module communicates.
Best branch: Local harness/connector/I-O branch. Inspect and test the repaired-area wiring and connector evidence using approved methods.
Case 3: SRS warning remains after collision
Collision history includes restraint deployment evidence and the SRS warning remains active after body repair.
Best branch: OEM restraint/post-collision procedure. Do not bypass or improvise tests; identify all required inspections/replacements/programming per vehicle procedure.
Case 4: No warning lamps, but camera calibration fails
Windshield/front structural work is complete and the network is healthy, but required camera calibration will not complete.
Best branch: Downstream geometry/calibration prerequisite branch. Verify glass/bracket, structural/alignment and OEM setup conditions rather than replacing the camera by assumption.
Randomized 10-Question Knowledge Check
Instructor Practical Rubric · 6 Dimensions
Safety & OEM procedure use
Rate 1–4 using observed evidence. Online completion does not equal practical competency.
Collision/complaint verification
Rate 1–4 using observed evidence. Online completion does not equal practical competency.
Power-network foundation testing
Rate 1–4 using observed evidence. Online completion does not equal practical competency.
Evidence selection & interpretation
Rate 1–4 using observed evidence. Online completion does not equal practical competency.
Root-cause / post-repair reasoning
Rate 1–4 using observed evidence. Online completion does not equal practical competency.
Verification & documentation
Rate 1–4 using observed evidence. Online completion does not equal practical competency.
Depth profile: Foundation = identify body electrical, network and restraint-system roles. Technician = correlate scan, power/ground, wiring and collision evidence. Deep = defend the failed-function diagnosis and all OEM-required post-collision verification/configuration/calibration steps.
Preserved supporting routes: Module Power/Ground/I-O · CAN/LIN Networks · Harness Restoration · ADAS OEM Research