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Home >> Jeep >> 2023 >> Grand Cherokee Altitude, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 32 (Hybrid Control Processor Module (HCP) - DTCS P1C8E-00 To P2535-00) >> DTC Troubleshooting >> P2535-00 Ignition Switch On/Start Position Circuit High >> Theory Of Operation

Theory Of Operation

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The Keyless Ignition Switch sends a LIN bus signal to the Radio Frequency (RF) Hub. The RF Hub sends a Controller Area Network (CAN) message to the Body Control Module (BCM) which in turn activates the Run/Start relay that provides a hard wired 12 volt signal to the Powertrain Control Module (PCM) and Hybrid Control Processor (HCP) located inside the Power Inverter Module (PIM).