Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Compressor Clutch Relay: Description and Operation

The ECM controls the A/C compressor clutch relay. When the A/C is turned on, the ECM delays the clutch engagement of the A/C compressor to allow the IAC valve to raise the engine idle speed to compensate for the added load. The ECM also causes the relay to disengage the A/C clutch at wide open throttle, high pressure power steering pump loads and hot engine restarts. The A/C is also disabled if coolant temperature exceeds 125~C