Lexus IS250 IS220d GSE20 ALE20 2AD-FHV ENGINE CONTROL SYSTEM
CHECK HARNESS AND CONNECTOR (EFI RELAY - ECM)
DTC P0560 System Voltage
DESCRIPTION
While the engine switch is OFF, battery voltage is supplied to terminal BATT of the ECM for storing DTCs and fuel injection feedback learning values.
| DTC No. | DTC Detection Condition | Trouble Area |
| P0560 | Condition (a) or (b) continues: (a) Significant decrease in battery voltage (b) Open in back-up power source circuit (1 trip detection logic) |
Open in back-up power source circuit Low battery voltage ECM |
- HINT:
- If DTC P0560 appears, the ECM does not store other DTCs.
WIRING DIAGRAM
INSPECTION PROCEDURE
| 1.CHECK HARNESS AND CONNECTOR (EFI RELAY - ECM) |
Check the harness and connectors between the EFI MAIN relay and ECM.
Remove the EFI MAIN relay from the engine room R/B No. 2.
Disconnect the A49 ECM connector.
Check the resistance between the wire harness side connectors
- Standard resistance (Check for open):
Tester Connection Specified Condition EFI MAIN relay (5) - BATT (A49-2) Below 1 Ω
- Standard resistance (Check for short):
Tester Connection Specified Condition EFI MAIN relay (5) or BATT (A49-2) - Body ground 10 kΩ or higher
Reinstall the EFI MAIN relay.
Reconnect the ECM connector.
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| OK | ||
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LEXUS IS250, IS220d / GSE20 ALE20