Toyota Celica 2005 Repair Manual page 765

DI−566
DTC P0560
MONITOR DESCRIPTION
The battery supplies electricity to the ECM even when the ignition switch is OFF. This electricity allows the
ECM to store data such as DTC history, freeze frame data, fuel trim values, and other data. If the battery
voltage falls below a minimum level, the ECM will conclude that there is a fault in the power supply circuit.
The next time the engine starts, the ECM will turn on the MIL and a DTC will be set.
DTC No.
P0560 Open in back up power source circuit
HINT:
If DTC P0560 appears, the ECM does not store other DTC.
MONITOR STRATEGY
Related DTCs
Required sensors/components
Frequency of operation
Duration
MIL operation
Sequence of operation
*1: The DTC is set immediately. The MIL will be illuminated after the engine starts in the next time.
TYPICAL MALFUNCTION THRESHOLDS
Item
The monitor will run whenever this DTC is
not present
Stand−by RAM
TYPICAL MALFUNCTION THRESHOLDS
Detection Criteria
Battery voltage
2005 CELICA (RM1131U)
DIAGNOSTICS
System Voltage
DTC Detecting Condition
ECM
Continuous
3 sec.
Immediate (*1)
None
Minimum
− ENGINE (2ZZ−GE)
S Open in back up power source circuit
S EFI fuse
S ECM
P0560
Specification
See page DI−295
Initialized
764
Trouble Area
System voltage malfunction
Maximum
Threshold
Less than 3.5 V
DI38N−16