ECD SYSTEM(for Swirl Control Valve), 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

A311425E04

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.

Tip:

  • 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

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  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

      A76-4 (E1) - Body ground

      Always

      Below 1 Ω

      A76-5 (E2) - Body ground

      Always

      Below 1 Ω

      A76-17 (E3) - Body ground

      Always

      Below 1 Ω

      A76-18 (E4) - Body ground

      Always

      Below 1 Ω

      A76-15 (BATT) - positive (+) battery terminal

      Always

      Below 1 Ω

      A76-2 (+B) - 3 (EFI MAIN relay holder)*1

      A76-2 (+B) - 5 (EFI MAIN relay holder)*2

      Always

      Below 1 Ω

      A76-14 (+B2) - 3 (EFI MAIN relay holder)*1

      A76-14 (+B2) - 5 (EFI MAIN relay holder)*2

      Always

      Below 1 Ω

      A76-1 (+B3) - 3 (EFI MAIN relay holder)*1

      A76-1 (+B3) - 5 (EFI MAIN relay holder)*2

      Always

      Below 1 Ω

      A76-9 (MREL) - 2 (EFI MAIN relay holder)

      Always

      Below 1 Ω

      5 (EFI MAIN relay holder) - positive (+) battery terminal*1

      3 (EFI MAIN relay holder) - positive (+) battery terminal*2

      Always

      Below 1 Ω

      1 (EFI MAIN relay holder) - Body ground

      Always

      Below 1 Ω

      A76-15 (BATT) or positive (+) battery terminal - Body ground

      Always

      10 kΩ or higher

      A76-2 (+B) or 3 (EFI MAIN relay holder) - Body ground*1

      A76-2 (+B) or 5 (EFI MAIN relay holder) - Body ground*2

      Always

      10 kΩ or higher

      A76-14 (+B2) or 3 (EFI MAIN relay holder) - Body ground*1

      A76-14 (+B2) or 5 (EFI MAIN relay holder) - Body ground*2

      Always

      10 kΩ or higher

      A76-1 (+B3) or 3 (EFI MAIN relay holder) - Body ground*1

      A76-1 (+B3) or 5 (EFI MAIN relay holder) - Body ground*2

      Always

      10 kΩ or higher

      A76-9 (MREL) or 2 (EFI MAIN relay holder) - Body ground

      Always

      10 kΩ or higher

      5 (EFI MAIN relay holder) or positive (+) battery terminal - Body ground*1

      3 (EFI MAIN relay holder) or positive (+) battery terminal - Body ground*2

      Always

      10 kΩ or higher

      • *1: for LHD

      • *2: for RHD

    REPAIR OR REPLACE HARNESS OR CONNECTORClick here

  3. CHECK HARNESS AND CONNECTOR (IGSW VOLTAGE)

    1. U121925E02

      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

      A76-37 (IGSW) - Body ground

      Ignition switch ON

      11 to 14 V
      Table 1. Text in Illustration

      *a

      Front view of wire harness connector

      (to ECM)

    INSPECT IG2 RELAYClick here

  4. INSPECT EFI MAIN RELAY

    1. Inspect the EFI MAIN relay (Click hereClick here).

    REPLACE EFI MAIN RELAYClick here

  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.

      Table 2. Result

      Result

      Proceed to

      No DTC output

      A

      DTC P0562

      B

    END

    REPLACE ECMClick here

  6. INSPECT IG2 RELAY

    1. Inspect the IG2 relay (Click hereClick here).

    REPLACE IG2 RELAYClick here

  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

      A76-37 (IGSW) - 1A-4

      Always

      Below 1 Ω

      1C-1 - positive (+) battery terminal

      Always

      Below 1 Ω

      1A-2 - Body ground

      Always

      Below 1 Ω

      1A-3 - H6-6 (IG2)

      Always

      Below 1 Ω

      1A-3 - H70-8 (IG2D)

      Always

      Below 1 Ω

      A76-37 (IGSW) or 1A-4 - Body ground

      Always

      10 kΩ or higher

      1C-1 or positive (+) battery terminal - Body ground

      Always

      10 kΩ or higher

      1A-3 or H6-6 (IG2) - Body ground

      Always

      10 kΩ or higher

      1A-3 or H70-8 (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

    CHECK ENTRY AND START SYSTEMClick here

    REPAIR OR REPLACE HARNESS OR CONNECTORClick here

  8. INSPECT IGNITION SWITCH ASSEMBLY

    1. Inspect the ignition switch assembly (Click here).

    REPAIR OR REPLACE HARNESS OR CONNECTORClick here

  9. REPLACE IGNITION SWITCH ASSEMBLY

    1. Replace the ignition switch assembly (Click here).

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  10. CHECK ENTRY AND START SYSTEM

    1. Check the entry and start system (Click here)

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  11. REPLACE EFI MAIN RELAY

    1. Replace the EFI MAIN relay.

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  12. REPLACE IG2 RELAY

    1. Replace the IG2 relay.

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  13. REPAIR OR REPLACE HARNESS OR CONNECTOR

    1. Repair or replace the harness or connector.

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  14. REPLACE ECM

    1. Replace the ECM (Click here).

  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.

    END