JLG 510AJ Service Manual - Manual (Page 163)

SECTION 3 - CHASSIS AND TURNTABLE
3121181 – JLG Lift – 3-121
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 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 actuator, power supplies, and
other powered devices that the ECM controls.
This fault will set if the ECM detects system voltage less than x
volts while the engine is operating at y RPM as defined in the
diagnostic calibration as the alternator should be charging the
system.