ECM SYSTEM
WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, DM
1-185
(15) Battery Voltage (DTC 562, 563)
DTC 562-Battery Voltage (VBat) Low
• Hardware: System voltage to ECM
• Enabling Conditions: Key on, Engine running above 1000 min
-1
(rpm)
• Set Conditions: Battery voltage to ECM less than 9.00 V for longer than 5 seconds
• Corrective Action(s): Illuminate MIL and disable fuel adaptive learn for the remainder of key cycle
• Non-emissions related fault
• Possible Causes: Low charging system output, low voltage input into ECM, faulty battery
DTC 563-Battery Voltage (VBat) High
• Hardware: System voltage to ECM
• Enabling Conditions: Key on, Engine running
• Set Conditions: Battery voltage to ECM greater than 16.0 V for longer than 3 seconds while the engine is running
• Corrective Action(s): Illuminate MIL and disable fuel adaptive learn for remainder of key cycle
• Non-emissions related fault
• Possible Causes: Charging system overcharging
The battery voltage powers the ECM and must be within limits to correctly operate injector drivers, ignition coils,
throttle, power supplies, and other powered devices that the ECM controls.
The fault of DTC 562 will set if the ECM detects system voltage less than 9.00 V while the engine is operating at
above 1000 min
-1
(rpm) as defined in the diagnostic calibration as the alternator should be charging the system. The
adaptive learn is disabled to avoid improper adaptive learning due to the inability to correctly time injector firings.
The fault of DTC 563 will set if the ECM detects system voltage greater than 16.0 V for longer than 3 seconds
while the engine is running. The adaptive learn is disabled to avoid improper adaptive learning.
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