Mojave has no support for the Celeron G1840, High Sierra - it works fine, in the Mojave - as if the XCPM is turned off (turned on in the configuration), I tried different settings, versions of the clover.
P.S. AppleHDA had to be removed - buggy.
P.P.S. HWmonitor only reads three fan slots - CPU 4pin, CHAFAN1 and 3pin fan for power (perhaps, because there imac only 3 fans on the aimag, it can add fans when changing the settings of the clover on the macpro.)