Ab60F Automatic Transmission Transaxle. Dtc P0560 System Voltage

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 ECM 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	The voltage at terminal BATT drops excessively for 3 seconds and part of the stored values in the ECU are initialized (1 trip detection logic).	Open in back up power source circuit (to BATT terminal) Battery Battery terminals EFI MAIN fuse ECM

Related Data List
DTC No.	Data List
P0560	Battery Voltage

HINT:

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

WIRING DIAGRAM

Land Cruiser. Urj200, 202 Grj200 Vdj200.Ab60F Automatic Transmission Transaxle.Automatic Transmission System (For 1Ur-Fe).
Dtc
P0560 System Voltage

INSPECTION PROCEDURE

NOTICE:

After replacing the ECM, the new ECM needs registration (Click here) and initialization (Click here).

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, and other data from the time the malfunction occurred.
When the ignition switch is ON, even though +B voltage is present, when the voltage at terminal BATT (power supply for maintaining memorized values in the ECM) drops excessively, a DTC is stored.

1.INSPECT FUSE (EFI MAIN)

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

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 Ω

Go to step 7

OK

2.CHECK HARNESS AND CONNECTOR (ENGINE ROOM RELAY BLOCK - ECM, BATTERY)

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 ECM connector.
3. Measure the resistance according to the value(s) in the table below.
  
  Standard Resistance (Check for Open):
  for LHD
  Tester Connection
  Condition
  Specified Condition
  EFI MAIN fuse (2) - A38-20 (BATT)
  Always
  Below 1 Ω
  for RHD
  Tester Connection
  Condition
  Specified Condition
  EFI MAIN fuse (2) - A52-20 (BATT)
  Always
  Below 1 Ω
  
  Standard Resistance (Check for Short):
  for LHD
  Tester Connection
  Condition
  Specified Condition
  EFI MAIN fuse (2) or A38-20 (BATT) - Body ground
  Always
  10 kΩ or higher
  for RHD
  Tester Connection
  Condition
  Specified Condition
  EFI MAIN fuse (2) or A52-20 (BATT) - Body ground
  Always
  10 kΩ or higher

for LHD
Tester Connection	Condition	Specified Condition
EFI MAIN fuse (2) - A38-20 (BATT)	Always	Below 1 Ω

for RHD
Tester Connection	Condition	Specified Condition
EFI MAIN fuse (2) - A52-20 (BATT)	Always	Below 1 Ω

for LHD
Tester Connection	Condition	Specified Condition
EFI MAIN fuse (2) or A38-20 (BATT) - Body ground	Always	10 kΩ or higher

for RHD
Tester Connection	Condition	Specified Condition
EFI MAIN fuse (2) or A52-20 (BATT) - Body ground	Always	10 kΩ or higher

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 cable from the positive (+) battery terminal.
3. Measure the resistance according to the value(s) in the table below.
  Standard Resistance (Check for Open):
  Tester Connection
  Condition
  Specified Condition
  Battery positive terminal - EFI MAIN fuse (1)
  Always
  Below 1 Ω
  Standard Resistance (Check for Short):
  Tester Connection
  Condition
  Specified Condition
  Battery positive terminal or EFI MAIN fuse (1) - Body ground
  Always
  10 kΩ or higher

Go to step 8

OK

3.INSPECT BATTERY

Check that the battery is not depleted.
OK:
Battery is not depleted.

Go to step 9

OK

4.CHECK BATTERY TERMINAL

Check that the battery terminals are not loose or corroded.
OK:
Battery terminals are not loose or corroded.

Go to step 10

OK

5.CHECK WHETHER DTC OUTPUT RECURS

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON and turn the tester on.

Clear the DTCs (Click here).

Turn the ignition switch off.

Turn the ignition switch to ON for 3 seconds.

Enter the following menus: Powertrain / ECT / DTC.

Read the DTCs.
Result
Result
Proceed to
P0560 is output
A
No DTC is output
B

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

END

A

6.REPLACE ECM

Replace the ECM (Click here).

Go to step 11

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

Go to step 11

8.REPAIR OR REPLACE HARNESS OR CONNECTOR

Go to step 11

9.REPLACE BATTERY

Go to step 11

10.REPAIR OR REPLACE BATTERY TERMINAL

NEXT

11.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

Connect the intelligent tester to the DLC3.

Clear the DTCs (Click here).

Turn the ignition switch off.

Turn the ignition switch to ON for 3 seconds.

Enter the following menus: Powertrain / ECT / DTC.

Confirm that the DTC is not output again.

END