STOP AND START SYSTEM, Diagnostic DTC:P0562

DTC Code DTC Name
P0562 System Voltage Low

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.

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.

  • Vehicle stopped while idling.

  • Battery

  • Harness or connector

  • Engine stop and start ECU

Tech Tips

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.


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

    Tech Tips


    • If the ECM learned values have been cleared by disconnecting the battery or for another reason, Stop and Start system control will be prohibited until ECM learning completes.

    • 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. 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.

      Tech Tips

      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.

    Tech Tips

    If the battery terminal has been disconnected, the ECO OFF indicator will be illuminated. In this case, drive the vehicle for 15 to 40 minutes to turn off the indicator.


    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.

WIRING DIAGRAM

A011ABBE01

INSPECTION PROCEDURE

Note


  • If the engine stop and start ECU is being replaced, register the previously recorded number of starter operations into the new engine stop and start 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.

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (BATTERY VOLTAGE)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

      Tech Tips

      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.

      Result
      Result Proceed to
      4 to 14 V A
      Below 4 V B

    B

    INSPECT INTEGRATION NO.1 RELAY (EFI RELAY) Click here

    A

    CHECK BATTERY AND CHARGING SYSTEM Click here

  2. INSPECT INTEGRATION NO.1 RELAY (EFI RELAY)


    1. A0119FDE02
      Text in Illustration
      *1

      Component without harness connected:

      (Integration Relay)

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

    2. Disconnect the integration relay connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1A-1 - 1C-1 Battery voltage not applied 10 kΩ or higher
      Battery voltage applied to terminals 1B-2 and 1C-3 Below 1 Ω

    4. Reconnect the integration relay connector.

    5. Reinstall the integration relay.


    NG

    REPLACE INTEGRATION NO.1 RELAY

    OK

  3. CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY - BODY GROUND)


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

    2. Disconnect the integration relay connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1C-3 - Body ground Always Below 1 Ω

    4. Reconnect the integration relay connector.

    5. Reinstall the integration relay.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY - ENGINE STOP AND START ECU)


    1. Disconnect the 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
      1C-1 (integration relay) - D79-6 (+B) Always Below 1 Ω
      1C-1 (integration relay) - Body ground Always 10 kΩ or higher
      D79-6 (+B) - Body ground Always 10 kΩ or higher

    5. Reconnect the integration relay connector.

    6. Reinstall the integration relay.

    7. Reconnect the engine stop and start ECU connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the engine stop and start ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D78-6 (E1) - Body ground Always Below 1 Ω

    3. Reconnect the engine stop and start ECU connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ENGINE STOP AND START ECU Click here