STOP AND START SYSTEM, Diagnostic DTC:P0617

DTC Code DTC Name
P0617 Starter Relay Circuit High

DESCRIPTION

When the engine is started by stop and start control, the engine stop and start ECU controls the starter assembly by activating the ST NO. 1 relay (for starter pinion operation) via voltage from terminal STA and then, using its built-in starter delay circuit, activating the ST NO. 2 relay (for starter motor operation) via voltage from terminal STA2.

If overcurrent is detected in the starter relay circuit, the engine stop and start ECU stores DTC P0617 and blinks the stop and start cancel indicator light.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Memory
P0617 Starter Relay Circuit High

Both of the following conditions are met for 1 second (1 trip detection logic):


  • Ignition switch ON

  • Overcurrent to ST NO. 1 relay or ST NO. 2 relay is detected.

  • Wire harness or connector

  • ST NO. 1 relay

  • ST NO. 2 relay

  • Engine stop and start ECU

 Blinks DTC stored

CONFIRMATION DRIVING PATTERN

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. Tech Tips


    • If the cable is disconnected from the battery terminal, stop and start control is prohibited until refresh charge is completed.

      In this case, let the vehicle idle with the battery temperature at 11°C (51°F) or higher for 5 to 60 minutes to complete the refresh charge. (The refresh charge is complete when the Data List item Status of Battery Charge Control changes from "Refresh Charge Mode".)

    • If the GTS is not available and the Data List item Status of Battery Charge Control cannot be checked, charge the battery by idling the engine for approximately 5 to 60 minutes or driving the vehicle, and then drive the vehicle and check that stop and start control operates.

      If the engine is started with the hood open, the system determines that a jump start has occurred. Therefore, make sure that the hood is closed before starting the engine and driving the vehicle.

    • After the refresh charge completes, turn the engine switch off, wait for at least 30 seconds, and then start the engine again.

      If the vehicle enters refresh charge mode again while the engine is idling, the initial refresh charge did not properly complete, so wait for the refresh charge to complete.

    • 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.

    CONFIRMATION AFTER TROUBLESHOOTING


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Clear the DTCs.

      Click here


      Powertrain > Stop and Start > Clear DTCs

    4. Start the engine and warm it up.

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

      CAUTION:

      When performing Confirmation Driving Pattern, obey all speed limits and traffic laws.

    6. for Automatic Transmission:

      Depress the brake pedal and stop the vehicle.

      for Manual Transmission:

      Stop the vehicle, move the shift lever to neutral and release the clutch pedal.

    7. Keep the engine stopped by stop and start control for 1 second or more. (for Automatic Transmission: Keep the shift lever in D.)

    8. for Automatic Transmission:

      Release the brake pedal with the shift lever in D to start the engine.

      for Manual Transmission:

      Depress the clutch pedal and start the engine.

      Tech Tips

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

    9. Check that DTCs are not output.

      Click here


      Powertrain > Stop and Start > Trouble Codes

  2. Tech Tips


    • If the cable is disconnected from the battery terminal, stop and start control is prohibited until refresh charge is completed.

      In this case, let the vehicle idle with the battery temperature at 11°C (51°F) or higher for 5 to 60 minutes to complete the refresh charge. (The refresh charge is complete when the Data List item Status of Battery Charge Control changes from "Refresh Charge Mode".)

    • If the GTS is not available and the Data List item Status of Battery Charge Control cannot be checked, charge the battery by idling the engine for approximately 5 to 60 minutes or driving the vehicle, and then drive the vehicle and check that stop and start control operates.

      If the engine is started with the hood open, the system determines that a jump start has occurred. Therefore, make sure that the hood is closed before starting the engine and driving the vehicle.

    • After the refresh charge completes, turn the engine switch off, wait for at least 30 seconds, and then start the engine again.

      If the vehicle enters refresh charge mode again while the engine is idling, the initial refresh charge did not properly complete, so wait for the refresh charge to complete.

    STOP AND START SYSTEM OPERATION CHECK


    1. Start the engine and warm it up.

    2. Turn the air conditioning system off.

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

      CAUTION:

      When performing Confirmation Driving Pattern, obey all speed limits and traffic laws.

    4. for Automatic Transmission:

      Depress the brake pedal and stop the vehicle.

      for Manual Transmission:

      Stop the vehicle, move the shift lever to neutral and release the clutch pedal.

    5. Allow the engine to stop by stop and start control. (for Automatic Transmission: Keep the shift lever in D.)

    6. for Automatic Transmission:

      Release the brake pedal with the shift lever in D to start the engine.

      for Manual Transmission:

      Depress the clutch pedal and start the engine.

WIRING DIAGRAM


  1. for Automatic Transmission:

    B00261IE04
    B00290WE01

  2. for Manual Transmission:

    B00246EE01
    B0024X1E01

CAUTION / NOTICE / HINT

Note


  • Before replacing the engine stop and start ECU, read the number of starter operations and total number of engine starts and write it into a new engine stop and start ECU.

    Click here

  • After replacing the engine stop and start ECU or air conditioning amplifier assembly, reset and perform learning of the air conditioning information in the engine stop and start ECU.

    Click here

  • After replacing the engine stop and start ECU or airbag sensor assembly, clear and calibrate the deceleration sensor zero point in the engine stop and start ECU.

    Click here

  • for Automatic Transmission:

    When the engine stop and start ECU is replaced, check the electromagnetic oil pump.

    Click here

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

Tech Tips

Using the GTS, read the freeze frame data before troubleshooting. System condition information is recorded as freeze frame data the moment a DTC is stored. This information can be useful when troubleshooting.

Click here

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - BBC FUSE)


    1. Disconnect the G125 engine stop and start ECU connector.

    2. Remove the BBC NO. 1 and BBC NO. 3 fuses from the engine room relay block and junction block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G125-1 (BIN2) - BBC NO. 1 fuse terminal 2 Always Below 1 Ω
      G125-3 (BIN1) - BBC NO. 3 fuse terminal 2 Always Below 1 Ω
      G125-1 (BIN2) - Body ground Always 10 kΩ or higher
      G125-3 (BIN1) - Body ground Always 10 kΩ or higher
      BBC NO. 3 fuse terminal 2 - Body ground Always 10 kΩ or higher
      BBC NO. 1 fuse terminal 2 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - ST NO. 1, ST NO. 2 RELAY)


    1. Disconnect the G125 and G126 engine stop and start ECU connectors.

    2. Remove the ST NO. 1 and ST NO. 2 relays from the engine room relay block and junction block.

    3. Remove the BBC NO. 1 and BBC NO. 3 fuses from the engine room relay block and junction block.

    4. w/ Entry and Start System:

      Disconnect the G70 certification ECU (smart key ECU assembly) connector.

    5. for Automatic Transmission:

      Disconnect the C24 park/neutral position switch assembly connector.

    6. for Manual Transmission:

      Disconnect the B2 clutch start switch assembly (for lower) connector.

    7. Disconnect the G85 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G126-21 (STA) - ST NO. 1 relay terminal 2 Always Below 1 Ω
      G126-23 (STA2) - ST NO. 2 relay terminal 2 Always Below 1 Ω
      G126-21 (STA) - Body ground Always 10 kΩ or higher
      ST NO. 1 relay terminal 2 - Body ground Always 10 kΩ or higher
      G126-23 (STA2) - Body ground Always 10 kΩ or higher
      ST NO. 2 relay terminal 2 - Body ground Always 10 kΩ or higher
      G125-1 (BIN2) - G126-21 (STA) Always 10 kΩ or higher
      G125-3 (BIN1) - G126-21 (STA) Always 10 kΩ or higher
      G125-1 (BIN2) - G126-23 (STA2) Always 10 kΩ or higher
      G125-3 (BIN1) - G126-23 (STA2) Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK ENGINE STOP AND START ECU


    1. Disconnect the G126 engine stop and start ECU connector.

      B0027LUC02
      *a

      Component without harness connected

      (Engine Stop and Start ECU)

      		 - -

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G126-21 (STA) - G126-6 (DGND) Always 10 kΩ or higher
      G126-23 (STA2) - G126-6 (DGND) Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE ENGINE STOP AND START ECU Click here

    OK

  4. INSPECT RELAY (ST NO. 1, ST NO. 2 RELAY)


    1. Inspect the ST NO. 1 relay.

      Click here

    2. Inspect the ST NO. 2 relay.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    REPLACE RELAY (ST NO. 1, ST NO. 2 RELAY)