Component Diagnostic Charts/Tests

Fig. 030 Chart C-10A A/C Clutch Control (1 of 2):

Fig. 031 - Wiring Diagram for Chart C-10A A/C Clutch Control. VIN 0, VIN R, VIN U:

CHART C-10A

A/C CLUTCH CONTROL

1.8L "J" AND 2.5L "A & N" SERIES

FUEL INJECTION (TBI)

With air conditioning on, ignition voltage is supplied to the compressor high side low pressure switch (identified by its green color),
If system refrigerant level is OK, the low pressure switch will be closed completing the circuit through the closed high pressure cut-off switch (red color) to circuit 459.
Circuit 459 supplies voltage to the A/C control relay and the ECM terminal 21. The ECM will delay about 1/2 second then ground terminal 7 and circuit 458. This will close the A/C relay and allow current to flow through the relay and circuit 59 to engage the compressor clutch.