JLG 510AJ Service Manual - Manual (Page 165)

SECTION 3 - CHASSIS AND TURNTABLE
3121181 – JLG Lift – 3-123
DTC 563- Battery Voltage (VBat) High
• System voltage to ECM
• Check Condition- Key on, Engine Cranking or Running
• Fault Condition- Battery voltage to ECM greater than x
volts while the engine is running as defined in the diagnos-
tic calibration
• Corrective Action(s)- Illuminate MIL and/or sound audible
warning or illuminate secondary warning lamp, disable
adaptive fueling correction for remainder of key cycle
• Non-emissions related fault
The battery voltage powers the ECM and must be within limits
to correctly operate throttle acutator, power supplies, and
other powered devices that the ECM controls.
This fault will set if the ECM detects system voltage greater
than x volts while the engine is running or cranking as defined
in the diagnostic calibration.