Dtc P0560 System Voltage

Engine. Lexus Gs430, Gs300. Uzs190 Grs190
3Uz-Fe Engine Control System. Lexus Gs430, Gs300. Uzs190 Grs190

MONITOR DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ DATA LIST (BATTERY VOLTAGE)

INSPECT FUSE (EFI)

CHECK WIRE HARNESS (ECM - EFI FUSE, EFI FUSE - BATTERY)

INSPECT BATTERY

DTC P0560 System Voltage


MONITOR DESCRIPTION

The battery supplies electricity to the ECM even when the engine 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.

DTC No.
DTC Detection Condition
Trouble Area
P0560
Open in back-up power source circuit
  1. Open in back-up power source circuit
  2. ECM

WIRING DIAGRAM


Lexus Gs430, Gs300. Uzs190 Grs190.3Uz-Fe Engine Control System.Sfi System. Dtc P0560 System Voltage


INSPECTION PROCEDURE

1.READ DATA LIST (BATTERY VOLTAGE)

  1. Connect the intelligent tester to the DLC3.

  1. Enter the following menus: Powertrain / Engine / Data List / Primary / Battery Voltage.

    Result:

    Battery voltage
    		Proceed to
    Battery voltage is 0 V
    		A
    Battery voltage is except 0 V
    		B


B
Go to step 4
A


2.INSPECT FUSE (EFI)
Lexus Gs430, Gs300. Uzs190 Grs190.3Uz-Fe Engine Control System.Sfi System. Dtc P0560 System Voltage

  1. Remove the EFI fuse from the engine room No. 2 junction block.

  1. Measure the resistance of the fuse.

    Standard resistance:
    Below 1 Ω


NG
REPLACE FUSE
OK


3.CHECK WIRE HARNESS (ECM - EFI FUSE, EFI FUSE - BATTERY)
Lexus Gs430, Gs300. Uzs190 Grs190.3Uz-Fe Engine Control System.Sfi System. Dtc P0560 System Voltage

  1. Check the wire harness between the EFI fuse and ECM.

    1. Remove the EFI fuse from the engine room No. 2 junction block.

    2. Disconnect the A6 ECM connector.

    3. Measure the resistance of the wire harness side connectors.

      Standard resistance:
      Tester Connection
      		Specified Condition
      Junction block EFI fuse terminal 2 - A6-4 (BATT)
      		Below 1 Ω
      Junction block EFI fuse terminal 2 or A6-4 (BATT) - Body ground
      		10 kΩ or higher

  1. Check the wire harness between the EFI fuse and battery.

    1. Remove the EFI fuse from the engine room No. 2 junction block.

    2. Disconnect the battery positive (+) terminal.

    3. Measure the resistance of the wire harness side connectors.

      Standard resistance:
      Tester Connection
      		Specified Condition
      Battery positive (+) terminal - Junction block EFI fuse terminal 1
      		Below 1 Ω
      Battery positive (+) terminal or junction block EFI fuse terminal 1 - Body ground
      		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


4.INSPECT BATTERY

  1. Check that the battery is not depleted.

    OK:
    Battery voltage is 11 V or more.


NG
REPLACE BATTERY
OK

CHECK FOR INTERMITTENT PROBLEMS