Engine. Lexus Is250, Is220D. Gse20 Ale20
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
INSPECT ECM (BATT VOLTAGE)
DESCRIPTION
The battery supplies electricity to the ECM even when the engine 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, 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 will illuminate the MIL and sets the DTC.DTC No.
| DTC Detection Condition
| Trouble Area
|
P0560
| Open in ECM back-up power source circuit
(1 trip detection logic)
| - Open in back-up power source circuit
- ECM
|
- HINT:
- If DTC P0560 is set, the ECM does not store other DTCs.
WIRING DIAGRAM
INSPECTION PROCEDURE
- HINT:
- Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, 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 (Click here).
| 1.INSPECT ECM (BATT VOLTAGE) |
Measure the voltage of the A5 and E4 ECM connectors.
- Standard voltage:
Tester Connection
| Specified Condition
|
BATT (A5-4) - E1 (E4-7)
| 9 to 14 V
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI FUSE - ECM) |
|
|
