Diagnostic trouble code P0560 3UR-FE Land Cruiser

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT FUSE (EFI MAIN)

CHECK HARNESS AND CONNECTOR (EFI NO. 1 FUSE - ECM, BATTERY)

INSPECT BATTERY

CHECK BATTERY TERMINAL

CHECK WHETHER DTC OUTPUT RECURS

DTC 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 memory is 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 stores the DTC.

DTC Code	DTC Detection Condition	Trouble Area
P0560	An open in the ECM back up power source circuit (1 trip detection logic).	Open in back up power source circuit Battery Battery terminals EFI MAIN fuse ECM

HINT:

If DTC P0560 is stored, the ECM does not store other DTCs or the data stored in the ECM is partly cleared.

Wiring diagram

Inspection procedure

HINT:

Read freeze frame data using the intelligent tester. Freeze frame data records 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.

1.INSPECT FUSE (EFI MAIN)

1. Remove the EFI MAIN fuse from the engine room relay block.

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   EFI MAIN fuse	Always	Below 1 ?

NG	CHECK FOR SHORTS IN ALL HARNESSES AND CONNECTORS CONNECTED TO FUSE AND REPLACE FUSE

OK

2.CHECK HARNESS AND CONNECTOR (EFI NO. 1 FUSE - ECM, BATTERY)

1. Check the harness and the connector between the EFI MAIN fuse and ECM.

   1. Remove the EFI MAIN fuse from the engine room relay block.

   2. Disconnect the A38 ECM connector.

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

      Standard Resistance:

      Tester Connection	Condition	Specified Condition
      EFI MAIN fuse terminal 2 - A38-1 (BATT)	Always	Below 1 ?
      EFI MAIN fuse terminal 2 or A38-1 (BATT) - Body ground	Always	10 k? or higher

2. Check the harness and the connector between the EFI MAIN fuse and battery.

   1. Remove the EFI MAIN fuse from the engine room relay block.

   2. Disconnect the positive battery terminal.

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

      Standard Resistance:

      Tester Connection	Condition	Specified Condition
      Battery positive (+) terminal - EFI MAIN fuse terminal 1	Always	Below 1 ?
      Battery positive (+) terminal or EFI MAIN fuse terminal 1- Body ground	Always	10 k? or higher

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.INSPECT BATTERY

1. Check that the battery is not depleted .

   OK:

   Battery is not depleted.

NG	REPLACE BATTERY

OK

4.CHECK BATTERY TERMINAL

1. Check that the battery terminals are not loose or corroded.

   OK:

   Battery terminals are not loose or corroded.

NG	REPAIR BATTERY TERMINAL

OK

5.CHECK WHETHER DTC OUTPUT RECURS

1. Connect the intelligent tester to the DLC3.

2. Turn the engine switch on (IG) and turn the tester on.

3. Clear DTCs .

4. Turn the engine switch off and turn the tester off.

5. Start the engine and turn the tester on.

6. Enter the following menus: Powertrain / Engine and ECT / DTC.

7. Read DTCs.

   Result

   Result	Proceed to
   P0560 is output	A
   No DTC is output	B

B	CHECK FOR INTERMITTENT PROBLEMS

A
REPLACE ECM