General Information

Engine Control

P0563 System Voltage High - General Information

Component Location





General Description

The ECM provides ground to one side of the coil of the main relay and the other side is connected to the battery. The ECM monitors battery voltage and the voltage after the main relay.

DTC Description

During engine running, if system voltage is above 16 V, ECM sets P0563. MIL (Malfunction Indication Lamp) turns on when the malfunction lasts till consecutive 2 driving cycle.

DTC Detecting Condition





Specification





Diagnostic Circuit Diagram





Signal Waveform & Data
















Fig 1) Normal waveforms of IG, L terminal of alternator during charge warning lamp is ON
Fig 2) Normal waveforms of IG, L terminal of alternator during charge warning lamp is OFF
Fig 3) Normal waveforms of COM, FR terminal of alternator at idle
Fig 4) Normal waveforms of COM, FR terminal of alternator under connector disconnected condition