Chart C-10: A/C Clutch Control Diagnosis (Impulse): Notes

When A/C is turned on, ECM supplies ground for A/C control relay. Battery voltage is supplied to A/C clutch solenoid through thermo switch relay. This relay is part of A/C on/off switch circuit. If A/C system exhibits high pressure or overheating condition, the system will be turned off by A/C high pressure safety switch or by A/C thermo switch circuit.