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:
Tensile strength |
Major applicable parts |
440 - 780 MPa |
|
980 - 1350 MPa |
|
Read the following precautions when repairing HSS:
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.)
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 (1.97 in).
If spot welding is impossible, use MIG. welding. Do not use gas (torch) for welding because it is inferior in welding strength.
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.
Always note the following when spot welding HSS:
Handling of Ultra High Strength Steel Plate Parts
PROHIBITION OF CUT AND CONNECTION
Never cut and Joint the stiffener front side member (front floor inside frame parts) because its material is high strength steel plate (ultra high strength steel plate).
The front floor assembly must be replaced if this part is damaged.
Push-Button Ignition Switch (if so equipped)
WARNINGDo not operate the push-button ignition
switch while driving the vehicle except in
an emergency. (The engine will stop when
the ignition switch is pushed 3 consecutive
times in quick succession or the ignition
switch is pushed and held for more
than 2 seconds.) If the ...
None of the power windows can be operated using any
switch
Diagnosis Procedure
1.CHECK BCM POWER SUPPLY AND GROUND CIRCUIT
Check BCM power supply and ground circuit.
Refer to BCS-68, "Diagnosis Procedure" (with Intelligent Key system) or BCS-128,
"Diagnosis Procedure"
(without Intelligent Key system).
Is the inspection result ...
Interior room lamp control circuit
Description
Controls each interior room lamp (ground side) by PWM signal.
NOTE:
PWM signal control period is approximately 250 Hz (in the gradual
brightening/dimming).
Component Function Check
CAUTION:
Before performing the diagnosis, check that the following is normal.
Interior ro ...