SFI SYSTEM, Diagnostic DTC:P0562, P0563

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

DESCRIPTION

When the ignition switch is turned 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 power source circuit

  • Battery

  • Electrical over work

  • Generator

  • ECM
P0563 Battery voltage is 10 V or less when 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

A01VL75E01

CAUTION / NOTICE / HINT

Note


  • Perform idle learning after replacing the ECM 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 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, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE


  1. CHECK FOR DTC (DTC P0562 OR P0563)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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

    5. Read pending DTCs.

      Result
      Result Proceed to
      DTC P0562 is output A
      DTC P0563 is output B

    B

    CHECK CHARGING SYSTEM AND BATTERY Click here

    A

  2. CHECK HARNESS AND CONNECTOR (ECM - NO. 1 INTEGRATION RELAY)


    1. Disconnect the A93 ECM connector.

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A93-2 (+B) - 1E-4 Always Below 1 Ω
      A93-1 (+B1) - 1E-4 Always Below 1 Ω
      A93-2 (+B) or 1E-4 - Body ground Always 10 kΩ or higher
      A93-1 (+B1) or 1E-4 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK CHARGING SYSTEM AND BATTERY


    1. Check charging system and battery Click here.


    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE CHARGING SYSTEM AND BATTERY