P0560

2GR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0560: System Voltage

DTC P0560 - System Voltage

MONITOR DESCRIPTION

The battery supplies electricity to the ECM even when the ignition switch is off. This power allows the ECM to store data such as DTC history, freeze frame data and fuel trim values. If the battery voltage falls below a minimum level, these memories are cleared and the ECM determines that there is a malfunction in the power supply circuit. When the engine is next started, the ECM illuminates the MIL and sets the DTC.





HINT: If DTC P0560 is set, the ECM does not store other DTCs.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





WIRING DIAGRAM





INSPECTION PROCEDURE
HINT: Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

PROCEDURE

1. CHECK FUSE (EFI NO. 1 FUSE)




(a) Remove the EFI No. 1 fuse from the engine room relay block.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:





(c) Reinstall the EFI No. 1 fuse.
NG -- REPLACE FUSE (EFI NO. 1 FUSE)
OK -- Continue to next step.
2. INSPECT ECM (BATT VOLTAGE)




(a) Measure the voltage according to the value(s) in the table below.
Standard voltage:






NG -- CHECK HARNESS AND CONNECTOR (ECM - EFI NO. 1 FUSE)
OK -- CHECK FOR INTERMITTENT PROBLEMS
3. CHECK HARNESS AND CONNECTOR (ECM - EFI NO. 1 FUSE)




(a) Check the harness and the connector between the EFI No. 1 fuse and ECM.
(1) Remove the EFI No. 1 fuse from the engine room relay block.
(2) Disconnect the ECM connector.
(3) Measure the resistance according to the value(s) in the table below.
Standard resistance:
Check for open







Check for short






(4) Reconnect the ECM connector.
(5) Reinstall the EFI No. 1 fuse.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - EFI NO. 1 FUSE)
OK -- CHECK AND REPLACE ENGINE ROOM RELAY BLOCK