JLG 1250AJP Service Manual - Manual (Page 205)

SECTION 3 - 1CHASSIS & TURNTABLE
3121171 – JLG Lift – 3-157
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
The battery voltage powers the ECM and must be within
limits to correctly operate throttle actuator, power sup-
plies, 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.
BLACK
RED/TAN