DTC P0560 System Voltage

DESCRIPTION

The battery supplies electricity to the ECM even when the ignition switch is off. This power source 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 No.	DTC Detection Condition	Trouble Area
P0560	Open in the ECM backup power source circuit (1 trip detection logic).	Open in backup power source circuit Battery Battery terminals EFI MAIN fuse ECM

HINT:

If DTC P0560 is stored, the ECM becomes unable to store some DTCs. Also, all DTCs and some of the data stored in the ECM are cleared every time the ignition switch is turned off.

WIRING DIAGRAM

Dtc P0560 System Voltage. 1GR-FE ENGINE CONTROL. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

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 GTS. 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.CHECK HARNESS AND CONNECTOR (ECM - BATTERY)

Disconnect the ECM connector.

Disconnect the cable from the positive (+) battery terminal.

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

Standard Resistance:
for LHD
Tester Connection Condition Specified Condition
Battery positive terminal - A38-1 (BATT) Always Below 1 Ω
Battery positive terminal or A38-1 (BATT) - Body ground Always 10 kΩ or higher
for RHD
Tester Connection Condition Specified Condition
Battery positive terminal - A52-1 (BATT) Always Below 1 Ω
Battery positive terminal or A52-1 (BATT) - Body ground Always 10 kΩ or higher

for LHD
Tester Connection	Condition	Specified Condition
Battery positive terminal - A38-1 (BATT)	Always	Below 1 Ω
Battery positive terminal or A38-1 (BATT) - Body ground	Always	10 kΩ or higher

for RHD
Tester Connection	Condition	Specified Condition
Battery positive terminal - A52-1 (BATT)	Always	Below 1 Ω
Battery positive terminal or A52-1 (BATT) - Body ground	Always	10 kΩ or higher

Reconnect the ECM connector.

Reconnect the cable to the positive (+) battery terminal.

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2.INSPECT BATTERY

Check that the battery is not depleted.

OK:
Battery is not depleted.

REPLACE BATTERY

OK

3.CHECK BATTERY TERMINAL

Check that the battery terminals are not loose or corroded.

OK:
Battery terminals are not loose or corroded.

REPAIR OR REPLACE BATTERY TERMINAL

OK

4.CHECK WHETHER DTC OUTPUT RECURS

Connect the GTS to the DLC3.

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

Clear the DTCs ().

Turn the ignition switch off and turn the GTS off.

Start the engine and turn the GTS on.

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

Read the DTCs.

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

CHECK FOR INTERMITTENT PROBLEMS ()

REPLACE ECM ()