Engine Control System - SFI System

2GR-FSE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0560: System Voltage
P0560 - System Voltage

DESCRIPTION

The battery supplies electricity to the ECM even when the power 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, 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 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





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 Freeze Frame Data.

PROCEDURE

1. CHECK FUSE (EFI FUSE)





(a) Remove the EFI fuse from the engine room No. 1 junction block.

(b) Measure 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. INSPECT INTEGRATION NO.1 RELAY

(a) Remove the integration relay (Unit A) from the engine room No. 1 relay block.





(b) Measure the resistance of the integration relay.

Standard resistance:





(c) Reinstall the integration relay.

NG -- REPLACE INTEGRATION NO.1 RELAY
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (ECM - BATTERY)

(a) Disconnect the cable from the battery negative terminal and positive terminal.

(b) Disconnect the A53 ECM connector.

(c) Measure the resistance.

Standard resistance (Check for open):





Standard resistance (Check for short):





(d) Reconnect the ECM connector.

(e) Reconnect the cable to the battery positive terminal and negative terminal.

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

4. INSPECT BATTERY

(a) Check that the battery is not depleted.

OK:

Battery is not depleted

NG -- REPLACE BATTERY
OK -- Continue to next step.

5. 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.

6. CHECK WHETHER DTC OUTPUT RECURS

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG) and turn the Techstream on.

(c) Clear DTCs DTC Check / Clear.

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

(e) Read the DTCs.

Result:





B -- CHECK FOR INTERMITTENT PROBLEMS

A -- REPLACE ECM Removal