ECD SYSTEM, Diagnostic DTC:P0562

DTC Code DTC Name
P0562 System Voltage Low

DESCRIPTION

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 No. DTC Detection Condition Trouble Area
P0562

When ECM supply voltage falls below 1.25 V for 5 seconds.

(1 trip detection logic)

  • ECM power supply circuit

  • ECM

WIRING DIAGRAM

A004OB5E02

CAUTION / NOTICE / HINT

Note


  • When replacing the ECM, the ECM needs Registration and Initialization Click here.

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

Tech Tips


  • When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. Then after installing the new ECM, perform all of the initialization/registrations for the "Learning Values Write" function by following the instructions shown on the GTS display.

  • 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, and other data from the time the malfunction occurred.

PROCEDURE


  1. READ VALUE USING GTS (BATTERY VOLTAGE)


    1. Connect the GTS to the DLC3.

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

    3. Enter the following menus: Powertrain / Engine and ECT / Data List / Battery Voltage.

    4. Read the value.

      OK
      11 to 14 V

    OK

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

    NG

  2. CHECK HARNESS AND CONNECTOR


    1. Disconnect the negative (-) battery terminal.

    2. Disconnect the positive (+) battery terminal.

    3. Disconnect the ECM connector.

    4. Remove the EFI MAIN relay from the engine room No. 1 relay block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A83-4 (E1) - Body ground Always Below 1 Ω
      A83-5 (E2) - Body ground Always Below 1 Ω
      A83-17 (E3) - Body ground Always Below 1 Ω
      A83-18 (E4) - Body ground Always Below 1 Ω
      A83-15 (BATT) - positive (+) battery terminal Always Below 1 Ω
      A83-2 (+B) - 5 (EFI MAIN relay holder) Always Below 1 Ω
      A83-14 (+B2) - 5 (EFI MAIN relay holder) Always Below 1 Ω
      A83-1 (+B3) - 5 (EFI MAIN relay holder) Always Below 1 Ω
      A83-9 (MREL) - 2 (EFI MAIN relay holder) Always Below 1 Ω
      3 (EFI MAIN relay holder) - positive (+) battery terminal Always Below 1 Ω
      1 (EFI MAIN relay holder) - Body ground Always Below 1 Ω
      A83-15 (BATT) or positive (+) battery terminal - Body ground Always 10 kΩ or higher
      A83-2 (+B) or 5 (EFI MAIN relay holder) - Body ground Always 10 kΩ or higher
      A83-14 (+B2) or 5 (EFI MAIN relay holder) - Body ground Always 10 kΩ or higher
      A83-1 (+B3) or 5 (EFI MAIN relay holder) - Body ground Always 10 kΩ or higher
      A83-9 (MREL) or 2 (EFI MAIN relay holder) - Body ground Always 10 kΩ or higher
      3 (EFI MAIN relay holder) or positive (+) battery terminal - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (IGSW VOLTAGE)


    1. A004SI4E04
      Text in Illustration
      *a

      Front view of wire harness connector

      (to ECM)

      Disconnect the ECM connector.

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A83-37 (IGSW) - Body ground Ignition switch ON 11 to 14 V

    NG

    INSPECT IG2 RELAY Click here

    OK

  4. INSPECT EFI MAIN RELAY


    1. Inspect the EFI MAIN relay Click here.


    NG

    REPLACE EFI MAIN RELAY Click here

    OK

  5. CHECK WHETHER DTC OUTPUT RECURS (DTC P0562)


    1. Connect the GTS to the DLC3.

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

    3. Clear the DTCs Click here.

    4. Turn the ignition switch off and wait for 60 seconds or more [A].

    5. Perform road test [B].

    6. Repeat [A] and [B] for the number of trips detected.

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

    8. Read the DTCs.

      Result
      Result Proceed to
      No DTC output A
      DTC P0562 B

    A

    END

    B

    REPLACE ECM Click here

  6. INSPECT IG2 RELAY


    1. Inspect the IG2 relay Click here.


    NG

    REPLACE IG2 RELAY Click here

    OK

  7. CHECK HARNESS AND CONNECTOR


    1. Disconnect the negative (-) battery terminal

    2. Disconnect the positive (+) battery terminal

    3. Disconnect the ECM connector.

    4. Remove the EFI MAIN relay from the engine room No. 1 relay block.

    5. Remove the No. 1 integration relay from the engine room No. 1 relay block.

    6. Remove the power management control ECU (w/ Entry and Start System).

    7. Disconnect the ignition switch connector (w/o Entry and Start System).

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A83-37 (IGSW) - 1B-8 Always Below 1 Ω
      1C-1 - positive (+) battery terminal Always Below 1 Ω
      1B-6 - Body ground Always Below 1 Ω
      1B-7 - D98-6 (IG2) Always Below 1 Ω
      1B-7 - D113-8 (IG2D) Always Below 1 Ω
      A83-37 (IGSW) or 1B-8 - Body ground Always 10 kΩ or higher
      1C-1 or positive (+) battery terminal - Body ground Always 10 kΩ or higher
      1B-7 or D98-6 (IG2) - Body ground Always 10 kΩ or higher
      1B-7 or D113-8 (IG2D) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (w/o Entry and Start System) A
      OK (w/ Entry and Start System) B
      NG C

    B

    CHECK ENTRY AND START SYSTEM Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    A

  8. INSPECT IGNITION SWITCH ASSEMBLY


    1. Inspect the ignition switch assembly Click here.


    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    NG

  9. REPLACE IGNITION SWITCH ASSEMBLY


    1. Replace the ignition switch assembly Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  10. CHECK ENTRY AND START SYSTEM


    1. Check the entry and start system Click here


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  11. REPLACE EFI MAIN RELAY


    1. Replace the EFI MAIN relay.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  12. REPLACE IG2 RELAY


    1. Replace the IG2 relay.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  13. REPAIR OR REPLACE HARNESS OR CONNECTOR


    1. Repair or replace the harness or connector.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  14. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

  15. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

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

    3. Clear the DTCs Click here.

    4. Turn the ignition switch off and wait for 60 seconds or more [A].

    5. Perform road test [B].

    6. Repeat [A] and [B] for the number of trips detected.

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

    8. Confirm that the DTC is not output again.


    NEXT

    END