Electronic Parts; Corrosion Protection And Sealing - Hyundai H-1 Repair Manual

ELECTRONIC PARTS

Vehicles today include a great many electronic parts and components, and these are in general very susceptible to
adverse effects caused by overcurrent, reverse current, electromagnetic waves, high temperature, high humidity
impacts, etc.
In particular such electronic components can be damaged if there is a large current flow during welding from the body
side.
Therefore, take the following precautions during body repair to prevent damage to the CONTROL MODULS (ECM, TCM,
ABS CM, SRS CM, etc.)
1. Before removing and inspecting the electrical parts or before starting electric welding operations, disconnect the
negative (-) terminal cable from the battery.
2. Do not expose the CONTROL MODULS to ambient temperatures above 80°C (176°F).
NOTE :
If it is possible the ambient temperatures may reach 80°C (176°F) or more, remove the CONTROL MODULS
from the vehicle before starting work.
3. Be careful not to drop the CONTROL MODULS and not to apply physical shocks to them.

CORROSION PROTECTION AND SEALING

Proper corrosion protection and sealing is an important part of any repair. When reviewing these repair procedures, it
is important to recognize the need for corrosion restoration to provide for long term strength of the repaired member.
A two part epoxy primer was applied to the metal surfaces during the latter part of the repair. For closed sections,
such as front and rear rails, rocker panels and pillars, the primer is applied without applying the metal conditioner and
the conversion coating. These steps are omitted to insure that no rinse water is trapped in the closed sections. The
primer application is followed by an application of an oil or wax based rust proofing material.
After the corrosion restoration process for the closed sections are completed, then the process can be applied to all
exterior sections. For exterior surfaces, both metal conditioner and conversion coating treatments are applied to the
exterior surface prior to application of the epoxy primer. The procedure in applying the corrosion restoration process
is important order to insure that moisture, due to the water rinsing of the metal conditioner and conversion coating is
not inadvertently trapped inside any closed section before the epoxy primer and rust proofing materials have been
applied.
Appropriate seam sealers are then applied to all joints. Follow manufacturer's recommendations for the appropriate type
of seam sealer to be used at each seam or joint.
GENERAL INFORMATION - Electronic parts
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