P0560

2UZ-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 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 memory is cleared and the ECM will conclude that there is a fault in the power supply circuit. At the next engine start, the ECM will illuminate the MIL and set a DTC.





HINT: If DTC P0560 appears, the ECM does not store another DTC.

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. READ VALUE USING TECHSTREAM (BATTERY VOLTAGE)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch ON.
(c) Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Battery Voltage.
Result:






B -- INSPECT BATTERY
A -- Continue to next step.
2. INSPECT FUSE (EFI FUSE)




(a) Remove the EFI fuse from the engine room R/B.
(b) Measure the resistance of the fuse.
Standard resistance:
Below 1 Ohms
NG -- REPLACE FUSE
OK -- Continue to next step.
3. CHECK ECM (BATT VOLTAGE)




(a) Measure the voltage between terminals of the E7 and E9 ECM connectors.
Standard voltage:






OK -- CHECK FOR INTERMITTENT PROBLEMS
NG -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (ECM - EFI FUSE, EFI FUSE - BATTERY)




(a) Check the harness and the connector between the EFI fuse and ECM.
(1) Remove the EFI fuse from the engine room R/B.
(2) Disconnect the E9 ECM connector.
(3) Check the resistance between the wire harness side connectors.
Standard resistance (Check for open):






Standard resistance (Check for short):






(4) Reinstall the EFI fuse.
(5) Reconnect the ECM connector.
(b) Check the harness and the connector between the EFI fuse and battery.
(1) Remove the EFI fuse from the engine room R/B.
(2) Disconnect the negative battery cable.
(3) Check the resistance between the wire harness side connectors.
Standard resistance (Check for open):






Standard resistance (Check for short):






(4) Reinstall the EFI fuse.
(5) Reconnect the negative battery cable.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
5. INSPECT BATTERY
(a) Check that the battery is not depleted.
OK:
Battery voltage is 11 V or more.
NG -- REPLACE BATTERY
OK -- CHECK AND REPLACE ENGINE ROOM RELAY BLOCK