P0560

2AZ-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 in the OFF position. 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, the memory is 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 or the data stored in the ECM is partly erased.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





WIRING DIAGRAM





INSPECTION PROCEDURE
HINT: Read freeze frame data using the Techstream. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE

1. INSPECT FUSE (EFI MAIN)




(a) Remove the EFI MAIN 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 MAIN fuse.
NG -- CHECK FOR SHORTS IN ALL HARNESSES AND CONNECTORS CONNECTED TO FUSE AND REPLACE FUSE
OK -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (ECM - EFI MAIN FUSE - BATTERY)




(a) Disconnect the negative battery terminal.
(b) Disconnect the positive battery terminal.
(c) Remove the EFI MAIN fuse from the engine room relay block.
(d) Disconnect the ECM connector.
(e) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for open):






Standard resistance (Check for short):





(f) Reinstall the EFI MAIN fuse.
(g) Reconnect the ECM connector.
(h) Reconnect the positive battery terminal.
(i) Reconnect the negative battery terminal.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. INSPECT BATTERY
(a) Check that the battery is not depleted.
OK:
Battery is not depleted
NG -- REPLACE BATTERY
OK -- Continue to next step.
4. CHECK BATTERY TERMINAL
(a) Check that the battery terminals are not loose or corroded.
OK:
Battery terminals are not loose or corroded
NG -- REPAIR OR REPLACE BATTERY TERMINAL
OK -- Continue to next step.
5. CHECK WHETHER DTC OUTPUT RECURS
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream ON.
(d) Clear DTCs DTC Check / Clear.
(e) Turn the ignition switch to OFF and turn the Techstream OFF.
(f) Start the engine and turn the Techstream ON.
(g) Select the following menu items: Powertrain / Engine and ECT / Trouble Codes.
(h) Read DTCs.

Result





B -- CHECK FOR INTERMITTENT PROBLEMS
A -- REPLACE ECM