Have you checked that there is sufficient refrigerant in the system? Not enough refrigerant will cause the compressor not to switch on.
There are two fuses which supply the A/C compressor clutch relay, fuse F21, 15A, and fuse F35, 10A. Both the fuses and the relay is located in the engine fuse block, next to battery.
See image below.
Fuse F21 will supply ignition and fuse F35 has constant 12V
How to check fuse:
The A/C compressor relay is switched on via ground from the white/grey wire from the ECM pin 53 on connector X1, 56 pin.
The AC relay, KR29, is built into the engine fuse block, so it cannot be replaced on its own.
The easy way to check if the relay is working is to apply a ground to the white/grey wire at connector X3 pin B4 at the fuse block connector, switch on ignition and listen if the relay clicks. Also check if 12V is being transmitted out of pin B5, brown/green wire.
See image 2 for fuse block connector layout
How to check for 12V using test light or voltmeter:
How to test wiring:
Hope this helps.
Images (Click to enlarge)
Monday, August 22nd, 2022 AT 8:55 AM