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

A0137VNE01

INSPECTION PROCEDURE

Note

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

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

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.

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

PROCEDURE


  1. CHECK OUTPUT DTCS


    1. Connect the intelligent tester to the DLC3.

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

    3. Enter the following menus: Powertrain / Engine and ECT / DTC.

    4. Read DTCs.

      Result
      Result Proceed to
      P0562 A
      P0563 B

    B

    CHECK CHARGING SYSTEM AND BATTERY Click here

    A

  2. CHECK HARNESS AND CONNECTOR (ENGINE ROOM RELAY BLOCK - ECM)


    1. A0138JPE01

      Remove the engine room relay block.

    2. Remove the engine room relay block lower cover.

    3. Disconnect the ECM connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Switch Condition Specified Condition
      B26-24 (+B) - 1C-5 Always Below 1 Ω
      1C-5 - Battery cable Ignition switch ON Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      B26-24 (+B) or 1C-5 - Body ground Always 10 kΩ or higher

    5. Reinstall the engine room relay block.

    6. Reconnect the ECM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK CHARGING SYSTEM AND BATTERY


    1. Check charging system and battery Click here.


    NG

    REPAIR OR REPLACE CHARGING SYSTEM AND BATTERY

    OK

    REPLACE ECM Click here