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 repairing or replacing the defective part, perform the 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 securely?		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 ECM, battery and main relay.
5.CHECK FOR POOR CONTACT OF CONNECTORS.	Is there poor contact in connectors between ECM, generator and 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 displayed?	Replace the generator.
7.CHECK FOR ANY OTHER DTC ON DISPLAY.	Are other DTCs displayed?	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 fault condition, and reperform the check. NOTE: In this case, there may be a temporary connector contact failure.