Bolted-On and Removable Panel Service
What this domain tests
This domain tests service of bolted-on and removable panels: doors, hoods, fenders, hatches, and similar assemblies. The exam checks alignment sequence, torque, one-time fasteners, operation, and safety-system awareness.
Core rules
- Support the panel, disconnect electrical and mechanical links, and remove fasteners in a safe order; note shims and spacers.
- Align hinges and mounting points first, then latches and strikers; check gaps and flushness at several points.
- Use OEM torque values and replace torque-to-yield or one-time fasteners; do not elongate holes.
- Check latch, lock, window, and handle operation before final trim; verify no leaks or wind noise.
- Pre-scan and post-scan when the vehicle has safety systems; removable panels often carry sensors or cameras.
Worked example
A fender is replaced after a minor hit. The technician pre-scans, trial-fits the fender, aligns gaps to the hood and door, torques fasteners, and post-scans because a side sensor is nearby. Reasoning: the fender is cosmetic, but alignment affects adjacent panels and the sensor may need calibration or DTC clearing.
Traps
Aligning at the striker before hinges; over-torquing small fasteners; reusing one-time bolts; skipping the scan; ignoring a sensor behind the panel; checking gaps at only one point.