Pressure sensor

Essential special tools
Mot. 1608	Torque screwdriver

Tightening torques
pressure sensor	0.9 daN.m
battery cover bolts	0.4 daN.m
valve	0.8 daN.m

REMOVAL

• Position the vehicle on a two-post lift.
• Disconnect the battery, starting with the negative terminal.

Note: An automatic shut-off valve isolates the circuit from the outside when disconnected; there is no need to drain the refrigerant circuit.

• Remove the front bumper cover (see Front Bumper Cover).

• Disconnect the pressure sensor (1).
• Remove the pressure sensor.
• The triple-function pressure sensor fitted at the condenser outlet protects the refrigerant circuit:

• low-pressure cut-off: 2 bar,
• high-pressure cut-off: 27 bar.

• It informs the engine injection computer of the refrigerant circuit pressure.

• The engine injection computer controls the engine cooling fans according to the refrigerant circuit high pressure and vehicle speed.

INSTALLATION

• Refit in the reverse order of removal.
• Check that the O-ring is in good condition.
• Tighten to torque:

• the pressure sensor (0.9 daN.m),
• the battery cover bolts (0.4 daN.m).

WARNING

Connect the battery; carry out the necessary relearn procedures (Chapter Battery).

Note:

• When replacing the valve, tighten the valve to torque (0.8 daN.m) using tool (Mot. 1608).
• check air conditioning operation with the fan unit running at maximum speed.
• if there is no cooling, carry out a leak check (see Air conditioning chapter).