P0560
2AZ-FE ENGINE CONTROL: SFI SYSTEM: P0560: System Voltage
P0560 - System Voltage
MONITOR DESCRIPTION
The battery supplies electricity to the ECM even when the ignition 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 memory is cleared and the ECM determines that there is a malfunction in the power supply circuit. The next time the engine is started, the ECM illuminates the MIL and sets the DTC.
HINT
If DTC P0560 is set, the ECM does not store other DTCs or the data stored in the ECM may be partly erased.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
CONFIRMATION DRIVING PATTERN
1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure) DTC Check / Clear.
4. Turn the ignition switch off.
5. Turn the ignition switch to ON and turn the Techstream on [A].
6. Wait 5 seconds or more.
7. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
8. Input the DTC: P0560.
9. Check the DTC judgment result [B].
HINT
If the judgment result shows ABNORMAL, the system has a malfunction.
10. If the test result is UNKNOWN, enter the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending.
11. Read Pending DTCs.
HINT
If a pending DTC is output, the system is malfunctioning.
12. 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
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. INSPECT FUSE (EFI MAIN)
(a) Remove the EFI MAIN fuse from the engine room relay block.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
(c) Reinstall the EFI MAIN fuse.
NG -- REPLACE FUSE (EFI MAIN)
OK -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (ECM - EFI MAIN FUSE - BATTERY)
(a) Disconnect the negative battery terminal.
(b) Disconnect the positive battery terminal.
(c) Remove the EFI MAIN fuse from the engine room relay block.
(d) Disconnect the ECM connector.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Open):
Standard Resistance (Check for Short):
(f) Reinstall the EFI MAIN fuse.
(g) Reconnect the ECM connector.
(h) Reconnect the positive battery terminal.
(i) Reconnect the negative battery terminal.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - EFI MAIN FUSE - BATTERY)
OK -- Continue to next step.
3. INSPECT BATTERY
(a) Check that the battery is not discharged or weak.
OK:
Battery is not discharged or weak
NG -- CHARGE OR REPLACE BATTERY
OK -- Continue to next step.
4. 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 -- Continue to next step.
5. CHECK WHETHER DTC OUTPUT RECURS
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Clear the DTCs DTC Check / Clear.
(e) Turn the ignition switch to OFF and turn the Techstream OFF.
(f) Start the engine and turn the Techstream ON.
(g) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
(h) Read DTCs.
Result:
B -- CHECK FOR INTERMITTENT PROBLEMS Check for Intermittent Problems
A -- REPLACE ECM Components