Chart C10 - A/C Clutch Control

The A/C clutch control relay is ECM controlled to delay A/C clutch engagement .3 second after A/C is turned on. This allows the IAC to adjust engine RPM before the A/C clutch engages. The ECM also causes the relay to disengage the A/C clutch during Wide Open Throttle (WOT) operation. The A/C clutch control relay is energized when the ECM provides a ground path for circuit No. 366.

1. This test checks operation of A/C cycling switch.
2. This test checks to see if the ECM is controlling the A/C clutch control relay.
3. This test checks for open circuit on either side of relay coil.

Fig 1: Chart C10, Schematic, A/C Clutch Control (3.3L "A" Body)

Fig 2: Flow Chart C10, A/C Clutch Control (3.3L "A" Body)