ENGINE (DIAGNOSTICS)(H4DOTC) > Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0563 SYSTEM VOLTAGE HIGH

ENGINE (DIAGNOSTICS)(H4DOTC) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)

DTC P0563 SYSTEM VOLTAGE HIGH

DTC DETECTING CONDITION:

Immediately at fault recognition

TROUBLE SYMPTOM:

Charge warning light illuminates.

CAUTION:

After servicing or replacing faulty parts, perform Clear Memory Mode , and Inspection Mode .

WIRING DIAGRAM:

STEP	CHECK	YES	NO
1.CHECK GENERATOR. 1) Start the engine. 2) Run the engine at idle after warming up. 3) Measure the voltage between generator terminal B and chassis ground. Terminals Generator B terminal (+) — Chassis ground (−):	Is the voltage less than 16.2 V?		Repair the generator.
2.CHECK GENERATOR. 1) Run the engine at 5,000 rpm. 2) Measure the voltage between generator terminal B and chassis ground. Terminals Generator B terminal (+) — Chassis ground (−):	Is the voltage less than 16.2 V?		Repair the generator.
3.CHECK BATTERY TERMINAL. Turn the ignition switch to OFF.	Are the positive and negative battery terminals installed tightly?		Tighten the clamp of terminal.
4.CHECK INPUT VOLTAGE OF ECM. 1) Run the engine at idle. 2) Measure the voltage between ECM and chassis ground. Connector & terminal (B134) No. 7 (+) — Chassis ground (−): (B135) No. 2 (+) — Chassis ground (−):	Is the voltage less than 16.2 V?		Repair the harness connector between the ECM, battery and main relay.
5.CHECK POOR CONTACT OF CONNECTORS.	Is there poor contact of connectors between ECM, generator or battery?	Repair the connector.
6.CHECK ECM. 1) Connect all connectors. 2) Clear the memory. 3) Perform the Inspection Mode. 4) Read the DTC.	Is the same DTC as current diagnosis still output?	Replace the generator.
7.CHECK FOR ANY OTHER DTC ON DISPLAY.	Are other DTCs output?	Check the appropriate DTC using the “List of Diagnostic Trouble Code (DTC)”.	Even if DTC is detected, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again. NOTE: In this case, temporary poor contact of connector may be the cause.