Removing
1. Remove the refrigerant from the air conditioning system.
2. Remove the grille and air intake.
3. Disconnect the wiring connector B21.1 and B21.2 from the pressure sensor (see fig.10.13a,b).
Pic. 10.13a. Air conditioning pressure sensor (engines 111 and 601):
AT 21. Pressure meter,
B21.1, B21.2. Pressure sensor wiring connector,
B77. High / low pressure sensor in the system,
Q77.1. High/low system pressure sensor wiring connector.
Pic. 10.13 b. Air conditioning pressure sensor (engine 104.900):
AT 21. Pressure meter,
B21.1, B21.2. Pressure sensor wiring connector,
B77. High / low pressure sensor in the system,
Q77.1. High/low system pressure sensor wiring connector.
4. Unscrew pressure sensor B21.
5. Disconnect the B77.1 wiring connector from the high/low system pressure sensor.
6. Unscrew the B77 high/low pressure switch.
Installation
7. Installation is made in an order, the return to removal.