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 faulty component can be detected, 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 on to pressure switch 166 and check that this closes under the conditions mentioned.

IMPORTANT: The refrigerant sprays out if the pressure switch is removed.

WARNING
Risk Of Frost And Eye Injuries
Check antifrost thermostat 171. The temperature should be at least +6°C (+43°F) for the switch to close the circuit.

Engine Management System Check that the relay operates and that current is supplied to the relay contacts. If this is not the case, check that the coil is supplied with current from the terminal block (+15 circuit) and that it is grounded 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 is not depressed (recirculation not activated).
3. Check that current is supplied to terminal 7 of switch 143 when it is depressed (recirculation activated).