Up to 08/2009

2GR-FE ENGINE CONTROL: SFI SYSTEM: P0560: System Voltage
P0560 - System Voltage

DESCRIPTION

The battery supplies electricity to the ECM even when the engine switch is off. 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 stored ECM data is 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 set the DTC.





HINT
If DTC P0560 is set, the ECM does not store other DTCs.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





CONFIRMATION DRIVING PATTERN





- Connect the Techstream to the DLC3.

- Turn the engine switch on (IG) and turn the Techstream on.

- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure) DTC Check / Clear.

- Turn the engine switch off.

- Turn the engine switch on (IG) and turn the Techstream on [A].

- Wait 5 seconds or more.

- Enter the following menus: Powertrain / Engine / Utility / All Readiness.

- Input the DTC: P0560.

- Check the DTC judgment result [B].





HINT
If the judgment result shows ABNORMAL, the system has a malfunction.

- If the test result is UNKNOWN, enter the following menus: Powertrain / Engine / Trouble Codes / Pending.

- Read Pending DTCs.

HINT
If a pending DTC is output, the system is malfunctioning.

- If the test result is INCOMPLETE or UNKNOWN and no pending DTC is output, perform a universal trip and check for permanent DTCs DTC Check / Clear.

HINT
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.
WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following 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 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. CHECK HARNESS AND CONNECTOR (EFI NO. 1 FUSE - ECM)

(a) Disconnect the ECM connector.





(b) Remove the EFI No. 1 fuse from the engine room relay block.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance (Check for Open):





Standard Resistance (Check for Short):





Text in Illustration





(d) Reconnect the ECM connector.

(e) Reinstall the EFI No. 1 fuse.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI NO. 1 FUSE - ECM)
OK -- Continue to next step.

2. INSPECT BATTERY

(a) Check the battery voltage.

Battery voltage:

11 to 14 V

NG -- REPLACE BATTERY
OK -- Continue to next step.

3. 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 -- CHECK FOR INTERMITTENT PROBLEMS