Connect scantool to Data Link Cable (DLC)
Warm engine up to normal operating temperature.
Turn "OFF" electrical devices and A/C.
Monitor " APS", "APS1", "APS2 " parameter on the scantool.
Specification : at idle( 0% ) APS 1 : 600mV~800mV
APS 2 : 1/2 of APS 1