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STOP AND START SYSTEM, Diagnostic DTC:P0562

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DTC Code DTC Name
P0562 System Voltage Low
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DESCRIPTION

This description and the following Inspection Procedure are for DTC P0562 which is stored in the engine stop and start ECU. The engine stop and start ECU monitors the +B terminal voltage while the generator is not generating power (the engine is stopped due to Stop and Start system control). If the voltage is low, this DTC will be stored. The engine stop and start ECU monitors the AM21 terminal voltage while ignition switch is ON. If the voltage is low, this DTC will be stored.

DTC No. DTC Detection Condition Trouble Area
P0562

All of the following conditions continue for 2 seconds or more (1 trip detection logic):


  • +B terminal voltage 9 V or less.

  • During engine is stopped due to stop and start system control.

  • Battery

  • Harness or connector

  • NO. 1 integration relay

  • Engine stop and start ECU
P0562

All of the following conditions continue for 3 seconds or more (1 trip detection logic):


  • Open in the AM21 terminal circuit

  • DTC P060B (AD converter malfunction) is not detected after 0.5 seconds have passed since turning the ignition switch to ON.

  • Battery

  • Harness or connector

  • ECU-B NO.2 fuse

  • Engine stop and start ECU
Tip:

DTCs for the Stop and Start system are not cleared even if the malfunction has been repaired. After repairing the malfunction, be sure to clear the DTCs (Click here).


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  1. After troubleshooting, perform the following steps to recheck for DTCs and check if the Stop and Start system operates normally.

    Tip:

    • If the battery terminal has been disconnected, the stop and start will be prohibited. In this case, drive the vehicle for 15 to 40 minutes to permit the stop and start operation.

    • Allow the engine to idle for 3 minutes after the engine warms up and check that the engine speed is within 50 rpm of the target idle speed.


    1. for Manual Transaxle


      1. Connect the intelligent tester to the DLC3.

      2. Clear the DTCs (Click here).

      3. Start the engine and warm it up.

      4. Drive the vehicle at 20 km/h (12.4 mph) or more.

      5. Stop the vehicle, allow the engine to stop due to Stop and Start system control and wait for 3 seconds or more.

      6. Depress the clutch pedal to allow the engine to restart.

        Tip:

        If the engine cranks slowly when the engine is restarted, it can be determined that battery voltage is low.

      7. Check that no DTCs are output (Click here).

    2. for CVT


      1. Connect the intelligent tester to the DLC3.

      2. Clear the DTCs (Click here).

      3. Start the engine and warm it up.

      4. Drive the vehicle at 20 km/h (12.4 mph) or more.

      5. Stop the vehicle, allow the engine to stop due to Stop and Start system control and wait for 3 seconds or more.

      6. Release the brake pedal to allow the engine to restart. (with the shift lever in D)

        Tip:

        If the engine cranks slowly when the engine is restarted, it can be determined that battery voltage is low.

      7. Check that no DTCs are output (Click here).

  2. Check if the Stop and Start system operates normally.

    Tip:

    If the battery terminal has been disconnected, the stop and start will be prohibited. In this case, drive the vehicle for 15 to 40 minutes to permit the stop and start operation.


    1. for Manual transaxle


      1. Warm up the engine.

      2. Turn the air conditioning system off.

      3. Drive the vehicle at 7 km/h (4.3 mph) or more.

      4. Stop the vehicle. Move the shift lever to neutral and release the clutch pedal.

      5. Check that the engine stops.

      6. Depress the clutch pedal and check that the engine restarts.

    2. for CVT


      1. Warm up the engine.

      2. Turn the air conditioning system off.

      3. Drive the vehicle at 7 km/h (4.3 mph) or more.

      4. Stop the vehicle with the shift lever in D and depressed the brake pedal.

      5. Check that the engine stops.

      6. Release the brake pedal and check that the engine restarts.

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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

Note:

  • If the engine stop and start ECU is being replaced, download the number of starter operations to the tester from the old ECU before removing it, and then upload the number of starter operations from the tester to the new engine stop and start ECU after installing the ECU (Click here).

  • After the engine stop and start ECU is replaced or after an air conditioner kit is installed, clear the A/C information stored in the engine stop and start ECU (Click here).

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

  • After the engine stop and start ECU or airbag sensor assembly (yaw rate sensor) is replaced, initialize and calibrate 0 point of deceleration sensor (Click here).

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PROCEDURE


  1. Click here

    READ VALUE USING INTELLIGENT TESTER (BATTERY VOLTAGE)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

      Tip:

      Do not start the engine.

    3. Turn the tester on.

    4. Turn off all electrical systems.

    5. Enter the following menus: Powertrain / Stop and Start / Data List / Battery Voltage.

    6. Read the battery voltage displayed on the tester screen.

      Table 1. Result
      Result Proceed to
      4 to 14 V A
      Below 4 V B

  2. Click here

    INSPECT NO. 1 INTEGRATION RELAY (EFI RELAY)


    1. A01VG2WE02

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

    2. Disconnect the No. 1 integration relay connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1C-1 - 1D-22 Battery voltage not applied 10 kΩ or higher
      Battery voltage applied to terminals 1D-7 and 1E-10 Below 1 Ω
      Table 2. Text in Illustration
      *a

      Component without harness connected:

      (No. 1 Integration Relay)

    4. Reconnect the No. 1 integration relay connector.

    5. Reinstall the No. 1 integration relay.


  3. Click here

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


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

    2. Disconnect the No. 1 integration relay connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1E-10 - Body ground Always Below 1 Ω

    4. Reconnect the No. 1 integration relay connector.

    5. Reinstall the No. 1 integration relay.


    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  4. Click here

    CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - ENGINE STOP AND START ECU)


    1. Disconnect the A53 engine stop and start ECU connector.

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

    3. Disconnect the integration relay connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1D-22 (integration relay) - A53-11 (+B) Always Below 1 Ω
      1D-22 (integration relay) - Body ground Always 10 kΩ or higher
      A53-11 (+B) - Body ground Always 10 kΩ or higher

    5. Reconnect the integration relay connector.

    6. Reinstall the integration relay.

    7. Reconnect the A53 engine stop and start ECU connector.


    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  5. Click here

    CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - BATTERY AND BODY GROUND)


    1. A01VFMNE01

      Disconnect the A53 and F75 engine stop and start ECU connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      A53-13 (AM21) - Body ground Always 9.5 to 14 V
      Table 3. Text In Illustration
      *a

      Front view of wire harness connector

      (to Engine Stop and Start ECU)
    3. A01VLVHE01

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F75-6 (GND) - Body ground Always Below 1 Ω
      Table 4. Text In Illustration
      *a

      Front view of wire harness connector

      (to Engine Stop and Start ECU)

    4. Reconnect the A53 and F75 engine stop and start ECU connector.


    • OK

      REPLACE ENGINE STOP AND START ECU (Click here)

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR