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Home >> Isuzu >> 2003 >> Axiom Base, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing >> Modules & Relays >> Relays >> A/C Compressor Clutch
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A/C Compressor Clutch

A/C Compressor Clutch relay is located in underhood fuse/relay box. A 12-volt signal is supplied to A/C request input of PCM when A/C is selected through the A/C control switch. A/C compressor clutch relay is controlled through PCM. This allows PCM to modify idle air control position prior to A/C clutch engagement for better idle quality. If engine operating conditions are within their specified calibrated acceptable ranges, PCM will enable the A/C compressor relay. This is done by providing a ground path for the A/C relay coil within the PCM. When A/C compressor relay is enabled, battery voltage is supplied to A/C compressor clutch coil. PCM will enable A/C compressor clutch whenever engine is running and A/C has been requested. PCM will not enable A/C compressor clutch if any of the following conditions are met:

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