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SFI SYSTEM, Diagnostic DTC:P0562, P0563

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

When turn the ignition switch is 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

  • 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
Tip:

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

  • DTC P0562 or 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.

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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

  • Perform electronic throttle learning after replacing the ECM (Click here).

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

Tip:

Read freeze frame data using the intelligent tester. 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.

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PROCEDURE


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    CHECK FOR DTC (DTC P0562 OR P0563)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the tester on.

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

    5. Read pending DTCs.

      Table 1. Result
      Result Proceed to
      DTC P0562 is output A
      DTC P0563 is output B

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


    1. Disconnect the 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
      A71-24 (+B) - 1E-4 Always Below 1 Ω
      A71-23 (+B2) - 1E-4 Always Below 1 Ω
      A71-24 (+B) or 1E-4 - Body ground Always 10 kΩ or higher
      A71-23 (+B2) or 1E-4 - Body ground Always 10 kΩ or higher

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

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    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