SFI SYSTEM, Diagnostic DTC:P0562 and 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.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P0562

System Voltage Low

Battery voltage is between 2.5 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

Comes on

DTC stored

P0563

System Voltage High

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

Comes on

DTC stored

WIRING DIAGRAM

A326910E01

CONFIRMATION DRIVING PATTERN

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.

  • 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.

CAUTION / NOTICE / HINT

Note:

After replacing the ECM, perform idle learning.

Click here

Tip:

Read freeze frame data using the GTS. 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 DTC

    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 the DTCs.

      Powertrain > Engine and ECT > Trouble Codes

      Result

      Result

      Proceed to

      DTC P0562 is output

      A

      DTC P0563 is output

      B
    B

    CHECK CHARGING SYSTEM AND BATTERYClick here

    A

  2. CHECK HARNESS AND CONNECTOR (ECM - EFI-MAIN RELAY)

    1. Disconnect the ECM connector.

    2. Disconnect the driver side junction block assembly connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      A34-2 (+B) - 3C-7

      Always

      Below 1 Ω

      A34-1 (+B1) - 3C-7

      Always

      Below 1 Ω

      A34-2 (+B) or 3C-7 - Body ground

      Always

      10 kΩ or higher

      A34-1 (+B1) or 3C-7 - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK CHARGING SYSTEM AND BATTERY

    1. Check charging system and battery.

      w/ stop and start system:Click hereClick here

      w/o stop and start system:Click here

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE ECM

    Click hereClick here

    NG

    REPAIR OR REPLACE CHARGING SYSTEM AND BATTERY