SFI SYSTEM (w/ Electronic Throttle Control System), Diagnostic DTC:P0562, P0563

DTC Code DTC Name
P0562 System Voltage Low
P0563 System Voltage High

DESCRIPTION

When the ignition switch is turned to ON, the battery voltage is applied to terminal +B of the ECM.

DTC No. DTC Detection Condition Trouble Area
P0562 Battery voltage is between 2.5 V and 10 V when 180 seconds or more have elapsed since engine start (3 trip detection logic)

  • Open or short in backup power source circuit

  • Tired battery

  • Electrical over work

  • Generator

  • ECM
P0563 Battery voltage is 17 V or more when vehicle speed is 25 km/h (16 mph) or more, after 180 seconds or more have elapsed since engine start (3 trip detection logic).

  • Generator

  • Battery (If 24 V battery is installed, DTC P0563 is output)

  • ECM

Tech Tips


  • DTC P0562 is detected when the engine idles for 180 seconds or more.

  • DTC P0563 is detected when the vehicle speed is 25 km/h (16 mph) or more and 180 seconds or more have elapsed since engine start.

WIRING DIAGRAM

A0137XAE01

INSPECTION PROCEDURE

Note

After replace the ECM, perform electronic throttle learning Click here.

Tech Tips

Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. 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.

PROCEDURE


  1. CHECK OUTPUT DTCS


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON and turn the intelligent tester ON.

    3. Select the following menu items: Powertrain / Engine and ECT / DTC.

    4. Read DTCs.

      Result
      Display (DTC Output) Proceed To
      P0562 A
      P0563 B

    B

    INSPECT CHARGING SYSTEM AND BATTERY Click here

    A

  2. INSPECT FUSE (EFI FUSE)


    1. A0136TCE01

      Remove the EFI fuse from the engine room R/B.

    2. Measure the EFI fuse resistance.

      Standard resistance
      Below 1 Ω

    3. Reinstall the EFI fuse.


    NG

    CHECK FOR SHORT IN ALL HARNESSES AND COMPONENTS CONNECTED TO FUSE

    OK

  3. CHECK HARNESS AND CONNECTOR (ENGINE ROOM R/B - ECM)


    1. A0136MJE01

      Remove the engine room R/B.

    2. Remove the engine room R/B lower cover.

    3. Disconnect the B26 ECM connector.

    4. Measure the resistance.

      Standard resistance (Check for open)
      Tester Connection Specified Condition
      +B (B26-3) - Engine room R/B (1C-5) Below 1 Ω
      Engine room R/B (1C-5) - Battery cable Below 1 Ω
      Standard resistance (Check for short)
      Tester Connection Specified Condition
      +B (B26-3) or Engine room R/B (1C-5) and (5) - Body ground 10 kΩ or higher

    5. Reinstall the engine room R/B.

    6. Reconnect the ECM connector.


    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

  4. INSPECT CHARGING SYSTEM AND BATTERY


    NG

    REPAIR OR REPLACE CHARGING SYSTEM AND BATTERY

    OK

    REPLACE ECM