High Strength Steel (HSS)
High strength steel is used for body panels in order to reduce vehicle weight.
Accordingly, precautions in repairing automotive bodies made of high strength steel are described below:
SP130 is the most commonly used HSS.
Read the following precautions when repairing HSS: 1. Additional points to consider
• The repair of reinforcements (such as side members) by heating is not recommended since it may weaken the component.
When heating is unavoidable, do not heat HSS parts above 550°C (1,022°F).
Verify heating temperature with a thermometer.
(Crayon-type and other similar type thermometer are appropriate.)
• When straightening body panels, use caution in pulling any HSS panel. Because HSS is very strong, pulling may cause deformation in adjacent portions of the body. In this case, increase the number of measuring points, and carefully pull the HSS panel.
• When cutting HSS panels, avoid gas (torch) cutting if possible.
Instead, use a saw to avoid weakening surrounding areas due to heat. If gas (torch) cutting is unavoidable, allow a minimum margin of 50 mm (1.97in).
• When welding HSS panels, use spot welding whenever possible in order to minimize weakening surrounding areas due to heat.
If spot welding is impossible, use M.I.G. welding. Do not use gas (torch) welding because it is inferior in welding strength.
• The spot weld on HSS panels is harder than that of an ordinary steel panel.
Therefore, when cutting spot welds on a HSS panel, use a low speed high torque drill (1,000 to 1,200 rpm) to increase drill bit durability and facilitate the operation.
2. Precautions in spot welding HSS
This work should be performed under standard working conditions.
Always note the following when spot welding HSS: • The electrode tip diameter must be sized properly according to the metal thickness.
• The panel surfaces must fit flush to each other, leaving no gaps.
• Follow the specifications for the proper welding pitch.
Body alignment
Body Center Marks
A mark has been placed on each part of the body to indicate the vehicle
center. When repairing parts damaged
by an accident which might affect the vehicle frame (members, pillar ...
Replacement operations
Description
This section is prepared for technicians who have attained a high level of
skill and experience in repairing collision-
damaged vehicles and also use modern service tools and equipmen ...
Other materials:
IPDM E/R (intelligent power distribution
module engine room)
Diagnosis Procedure
1. CHECK FUSES AND FUSIBLE LINK
Check that the following IPDM E/R fuses or fusible link are not blown.
Is the fuse blown?
YES >> Replace the blown fuse or fusible link after repairing the affected
circuit.
NO >> GO TO 2
2. CHECK POWER SUPPLY CIRCUIT
1. Tu ...
Camera control unit
Removal and Installation - Coupe
REMOVAL
1. Disconnect the negative battery terminal.
2. Remove the trunk floor carpet and spare tire cover. Refer to INT-23, "Removal
and Installation".
3. Remove the LH trunk side finisher. Refer to INT-23, "Removal and
Installation" ...
ECM branch line circuit
Diagnosis Procedure
INSPECTION PROCEDURE
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the following terminals and connectors for damage, bend and loose
connection (unit side and connector
side).
- ECM
- Harne ...