Nissan Qashqai J11. Manual - part 1604

BRM-244

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[FOR RUSSIA]

PRECAUTIONS

CAUTION:

While waiting, never operate the vehicle such as locking, opening, and closing doors. Violation of
this caution results in the activation of ACC power supply according to the Auto ACC function.

6.

Remove 12V battery terminal.

CAUTION:

After installing 12V battery, always check self-diagnosis results of all ECUs and erase DTC.

REPAIRING HIGH STRENGTH STEEL

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REPAIRING HIGH STRENGTH STEEL

High Strength Steel (HSS)

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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

• Rear side floor

(Rear floor rear side component part) 

• Rear seat crossmember reinforcement assembly
• Trans control reinforcement

(Center front floor component part) 

• Front side member center extension

(Front floor component part) 

• 2nd and 3rd crossmember

(Front floor component part) 

• Inner sill
• Lower dash
• Lower dash crossmember
• Upper front hoodledge
• Front hoodledge reinforcement
• Hoodledge reinforcement
• Front strut housing
• Front side member closing plate assembly
• Front side member center closing plate
• Front side member front closing plate
• Front side member assembly
• Add on frame bracket
• Front side member front extension
• Front side member outrigger

(Front side member outrigger assembly component part) 

• Rear seat crossmember

(Rear seat crossmember component part) 

• Rear floor belt anchor reinforcement
• Rear side member front

(Rear side member assembly component part) 

• Rear side member rear
• Rear side member extension
• Rear roof rail
• Inner side roof rail
• Front roof rail brace
• Inner center pillar (Lower)

(Inner center pillar component part) 

• Center pillar reinforcement (Lower)

(Center pillar reinforcement component part) 

• Front pillar hinge brace

(Front pillar brace component part) 

• Outer sill reinforcement
• Rear roof rail brace

(Inner rear pillar component part) 

• Outer rear wheelhouse extension (Rear)

(Outer rear wheelhouse extension component part) 

BRM-246

< PRECAUTION >

[FOR RUSSIA]

REPAIRING HIGH STRENGTH STEEL

Read the following precautions when repairing HSS:

1.

Additional points to consider
• The repair of reinforcements (such as side members) by heat-

ing is not recommended, because it may weaken the compo-
nent. When heating is unavoidable, never heat HSS parts
above 550

°

C (1,022

°

F).

Verify heating temperature with a thermometer.
(Crayon-type and other similar type thermometer are appropri-
ate.)

• When straightening body panels, use caution in pulling any HSS panel. Because HSS is very strong,

pulling may cause deformation in adjacent sections 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 (1.97 in).

Tensile strength

Major applicable parts

980 - 1350 MPa

• Front side member stiffener

(Front floor component part) 

• Center sill reinforcement

(Inner sill component part) 

• Outrigger reinforcement

(Front side member outrigger assembly component part) 

• Front side member rear extension
• Rear side member rear reinforcement

(Rear side member assembly component part) 

• Front roof rail
• Roof reinforcement assembly
• Side roof reinforcement
• Inner center pillar (Upper)

(Inner center pillar component part) 

• Center pillar seat belt anchor

(Inner center pillar component part) 

• Outer side roof rail reinforcement
• Center pillar reinforcement (Upper)

(Center pillar reinforcement component part) 

• Center pillar seat belt reinforcement

(Center pillar reinforcement component part) 

• Center sill reinforcement

(Outer sill reinforcement component part) 

• Outer rear sill reinforcement

(Outer rear wheelhouse extension component part) 

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REPAIRING HIGH STRENGTH STEEL

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• When welding HSS panels, use spot welding whenever possi-

ble in order to minimize weakening surrounding areas due to
heat.
If spot welding is impossible, use MIG. welding. Do not use
gas (torch) for welding because it is inferior in welding
strength.

• Spot welding 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 condi-
tions. 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.

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