JLG 450A_AJ Series II Service Manual - Manual (Page 235)

SECTION 3 - CHASSIS & TURNTABLE
3121180 – JLG Lift – 3-185
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 diag-
nostic calibration.
• Corrective Action(s)- Illuminate MIL and/or sound audi-
ble warning or illuminate secondary warning lamp, dis-
able adaptive fueling correction for remainder of key
cycle.
• Non-emissions related fault.
Battery voltage powers the ECM and must be within limits
to correctly operate throttle actuator, power supplies, and
other powered devices the ECM controls.
This fault sets if the ECM detects system voltage greater
than x volts while engine is running or cranking as defined
in diagnostic calibration.