Power Supply

KL30 - Battery Voltage: B+ is the main supply of operating voltage to the ECM which is provided by the Power Module through the Integrated Voltage Supply Module (IVM). The IVM simply provides a splice point to provide B+ to the ECM.







Power Supplies: The component power supplies (KL15 and ECM Relays) are fused to the ME 9.2 ECM and output components. The fuses and relays are housed in the Integrated Voltage Supply Module (IVM) located in the Electronic Box. The fuses are separately replaceable, the relays are integral in the IVM.

KL15 - Ignition Switch Signal: When the ignition is switched "on" the ECM is informed from the CAS Module that the engine is about to be started via a "wakeup" call (15w) over the PT CAN line. The ECM also receives a "hardwire" KL15 input from the CAS Module. The ECM activates a ground circuit to the IVM to energize three relays providing operating power to the ECM and engine management components. KL15 "off" removes the ECM operating voltage and the KL15 signal from the PT CAN bus.

KL50 E - Start Request Signal: The momentary start request is transmitted from the CAS Module to inform the ECM to activate the starter relay (in the IVM) and activate engine management components.

Ground: Multiple ground paths are necessary to complete current flow through the ECM.