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Chart C-10:

A/C Circuit:

CIRCUIT DESCRIPTION:
The A/C relay is ECM controlled to delay A/C clutch engagement 0.3 seconds 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 WOT operation. The A/C relay is energized when the ECM provides a ground path for CKT 366.

TEST DESCRIPTION: Numbers below refer to circled numbers on the diagnostic chart.
1. Checks A/C low pressure cutout switch.
2. Verifies that the A/C request signal is present at the ECM.