P0560

1NZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0560: System Voltage
P0560 - System Voltage

DESCRIPTION

The battery supplies electricity to the ECM even when the ignition 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 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 are partly erased.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





CONFIRMATION DRIVING PATTERN





* Connect the Techstream to the DLC3.

* Turn the ignition switch to ON and turn the Techstream on.

* Clear DTCs (even if no DTCs are stored, perform the clear DTC operation).

* Turn the ignition switch off and wait for at least 30 seconds.

* Turn the ignition switch to ON and turn the Techstream on.

* Wait 5 seconds or more [A].

* Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [B].

* Read pending DTCs.

HINT
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
* Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

* Input the DTC: P0560.

* Check the DTC judgment result.





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

* If the 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 a Techstream. Freeze frame data record the engine condition when malfunctions are detected. 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 FUSE (EFI FUSE)





(a) Remove the EFI fuse from the engine room relay block.

(b) Check the resistance of the EFI fuse.

Standard resistance:

Below 1 Ohms

(c) Reinstall the EFI fuse.

NG -- CHECK FOR SHORTS IN ALL HARNESSES AND CONNECTORS CONNECTED TO FUSE AND REPLACE FUSE
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (ECM - EFI FUSE, EFI FUSE - BATTERY)





(a) Check the harness and the connector between the EFI fuse and ECM.

(1) Remove the EFI fuse from the engine room relay block.

(2) Disconnect the A21 ECM connector.

(3) Check the resistance.

Standard resistance (Check for open):





Standard resistance (Check for short):





(4) Reconnect the ECM connector.

(5) Reinstall the EFI fuse.

(b) Check the harness and the connector between the EFI fuse and battery.

(1) Remove the EFI fuse from the engine room relay block.

(2) Disconnect the positive battery terminal.

(3) Check the resistance.

Standard resistance (Check for open):





Standard resistance (Check for short):





(4) Reconnect the positive battery terminal.

(5) Reinstall the EFI fuse.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. INSPECT BATTERY

(a) Check that the battery is not depleted.

OK:

Battery is not depleted

NG -- 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 (DTC P0560)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Clear DTCs DTC Check / Clear.

(e) Turn the ignition switch off.

(f) Turn the Techstream off.

(g) Turn the ignition switch to ON and turn the Techstream on.

(h) Wait for 5 seconds or more.

(i) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

(j) Read DTCs.

Result:





B -- CHECK FOR INTERMITTENT PROBLEMS

A -- REPLACE ECM Removal