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Home >> Suzuki >> 2007 >> SX4 Base, Automatic >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine General Information And Diagnosis >> Diagnostic Information and Procedures >> ECM Power and Ground Circuit Check >> Circuit Description

Circuit Description

When the ignition switch is turned ON, the main relay turns ON (the contact point closes) and the main power is supplied to ECM. And then ECM supplies 5 V power to each sensor (EVAP leak check pressure sensor, A/C refrigerant pressure sensor, APP sensor and TP sensor).

If 5 V power circuit to each sensors from ECM is shorted to ground, ECM stops engine and emission control operation.

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