STOP AND START SYSTEM, Diagnostic DTC:P0335

DTC Code DTC Name
P0335 Engine Speed Sensor Circuit (NE Circuit)

DESCRIPTION

The crank position sensor sends an engine speed signal (NE signal) to the ECM. The engine speed signal is then sent directly from the NEO terminal of the ECM to the engine stop and start ECU. Additionally, the ECM sends the engine speed to the engine stop and start ECU via CAN communication. The engine stop and start ECU compares the NE signal and engine speed received via CAN communication to check for errors in the NE signal.

If the NE signal is abnormal, the engine stop and start ECU will blink the stop and start cancel indicator light and stores DTC P0335.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Memory
P0335 Engine Speed Sensor Circuit (NE Circuit)

All of the following conditions are met for 10 seconds (2 trip detection logic):


  • Normal communication between the ECM and the engine stop and start ECU.

  • Engine speed (NE signal) is below 6000 rpm.

  • Difference between the NE signal that is sent directly from ECM and the engine speed that is sent via CAN is 200 rpm or higher.

Both of the following conditions are met for 2 seconds or more (1 trip detection logic):


  • Starter is operating.

  • No NE signal input.

  • Wire harness or connector

  • Crank position sensor

  • ECM

  • Engine stop and start ECU

 Blinks DTC stored

CONFIRMATION DRIVING PATTERN

Tech Tips

DTCs for the stop and start system are not cleared automatically even if the malfunction has been repaired. After repairing the malfunction, be sure to clear the DTCs.

Click here


  1. CONFIRMATION AFTER TROUBLESHOOTING

    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 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". (Usually, idling the engine for 5 to 60 minutes with the battery fluid temperature at 11°C (52°F) or higher, the refresh charge will be completed.)

    • 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 it is warmed up and check that the engine idle speed is within 50 rpm of the target idle speed.


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG) and turn the GTS on.

    3. Clear the DTCs.

      Click here


      Powertrain > Stop and Start > Clear DTCs

    4. Start the engine and wait for at least 15 seconds.

    5. Check that DTCs are not output.

      Click here


      Powertrain > Stop and Start > Trouble Codes
      B007WL4E07

  2. STOP AND START SYSTEM OPERATION CHECK

    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 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". (Usually, idling the engine for 5 to 60 minutes with the battery fluid temperature at 11°C (52°F) or higher, the refresh charge will be completed.)

    • 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.


    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. Depress the brake pedal and stop the vehicle.

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

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

WIRING DIAGRAM

B007Z5ME22
*a Certification ECU (Smart Key ECU Assembly)
*b Crank Position Sensor
*c Engine Stop and Start ECU
*d CAN Communication Line

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, airbag sensor assembly*1 or yaw rate and acceleration sensor*2, clear and calibrate the deceleration sensor zero point in the engine stop and start ECU.

    Click here


    • *1: for Optitron Meter Type

    • *2: for TFT Meter Type

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 DTC OUTPUT (SFI SYSTEM)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Trouble Codes.


      Powertrain > Engine > Trouble Codes

    5. Read the DTCs

      Result
      Result Proceed to
      SFI system DTCs are output A
      SFI system crank position sensor circuit DTC is output B

    B

    GO TO SFI SYSTEM Click here

    A

  2. READ VALUE USING GTS (Engine Spd (NE Signal))


    1. Connect the GTS to the DLC3

    2. Start the engine.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Stop and Start / Data List / Engine Spd (NE Signal).

    5. According to the display on the GTS, read the Data List.


      Powertrain > Stop and Start > Data List
      Tester Display
      Engine Spd (NE Signal)
      OK
      Engine speed signal is input (the speeds displayed on the tachometer and the GTS are almost the same).
      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

  3. CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - ECM)


    1. Turn the engine switch off.

    2. Disconnect the A66 engine stop and start ECU connector.

    3. Disconnect the A46 ECM connector.

    4. Disconnect the A74 certification ECU (smart key ECU assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A66-10 (NE) - A46-30 (NEO) Always Below 1 Ω
      A66-10 (NE) - Body ground Always 10 kΩ or higher
      A46-30 (NEO) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the A66 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
      A66-6 (DGND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK ENGINE STOP AND START ECU (NE SIGNAL INPUT)


    1. Connect an oscilloscope to terminals A66-10 (NE) and A66-6 (DGND).

      B00804XC73
      *a

      Component with harness connected

      (Engine Stop and Start ECU)

      		 - -

    2. Start the engine.

    3. B007Y6SE01
      *a 5 V/DIV.
      *b 2 ms./DIV.

      Check the signal waveform according to the condition(s) in the table below.

      Item Condition
      Tester Connection A66-10 (NE) - A66-6 (DGND)
      Tool Setting 5 V/DIV., 2 ms./DIV.
      Condition Idling with warm engine
      Result
      Result Proceed to

      Pulse generation

      (See waveform)

      		 A
      Stuck at 0 to 1.5 V B
      Stuck at 8 to 14 V C

    A

    REPLACE ENGINE STOP AND START ECU Click here

    C

    GO TO SFI SYSTEM Click here

    B

  6. CHECK ENGINE STOP AND START ECU (NE TERMINAL VOLTAGE)


    1. Disconnect the A46 ECM connector.

      B00804XC74
      *a

      Component with harness connected

      (Engine Stop and Start ECU)

      		 - -

    2. Turn the engine switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A66-10 (NE) - A66-6 (DGND) Engine switch on (IG) 8 to 14 V

      Tech Tips

      DTCs may be stored during this inspection. Check for DTCs and clear them using the GTS.

      Result
      Proceed to
      OK
      NG

    OK

    GO TO SFI SYSTEM Click here

    NG

    REPLACE ENGINE STOP AND START ECU Click here