JLG 450A_AJ Series II Service Manual - Manual (Page 233)

SECTION 3 - CHASSIS & TURNTABLE
3121180 – JLG Lift – 3-183
DTC 562- Battery Voltage (VBat) Low
• System voltage to ECM.
• Check Condition- Key on, Engine on.
• Fault Condition- Battery voltage to ECM less than x
volts while the engine is operating at y RPM or greater
as defined in the diagnostic 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 less than
x volts while the engine is operating at y RPM as defined
in diagnostic calibration as the alternator should be charg-
ing the system.