Air Conditioning A/C

FAULT DIAGNOSIS HINTS
In general, the system is supplied with current when the ignition switch is in the Drive position. If no defective component can be found, check the wiring harness, connectors and ground connections.

A/C Compressor And A/C Radiator fan
1. Check fuses 11 and 6 and check that current is supplied to the A/C switch and relay 156.
2. Depress the A/C switch. Check that current is supplied to EDU control module 210 and from there to pressure switch 166. Check that this switch closes under the conditions mentioned.

WARNING
Refrigerant will spurt out if the pressure switch is removed.
Risk of Frostburn And Eye Injuries

3. Check antifrost thermostat 171. The temperature must be at least +6 °C (+43 °F) before its contacts will close the circuit.
4. Check that relay 156 operates and that the relay contacts are supplied with current.
5. Check that current is supplied to the coil from the terminal block (+15 circuit) and that it is connected to ground in the relevant control module.

Recirculation
1. Check that fuse 1 is intact and supplied with current.
2. Check that current is supplied to terminal 2 of switch 143 when it not depressed (recirculation not activated).
3. Check that current is supplied to terminal 7 of switch 143 when it is depressed (recirculation activated).