STOP AND START SYSTEM, Diagnostic DTC:P0335

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

DESCRIPTION

The crankshaft 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.

In addition, the ECM sends the engine speed value to the engine stop and start ECU via CAN communication, and the engine stop and start ECU compares the NE signal and the engine speed to check for errors in the NE signal.

If any errors are detected, the engine stop and start ECU cancels stop and start control.

DTC No. DTC Detection Condition Trouble Area
P0335

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


  • Starter is operating.

  • No NE signal input.

  • Wire harness or connector

  • Crankshaft position sensor

  • ECM

  • Engine stop and start ECU

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. CONFIRMATION AFTER TROUBLESHOOTING

    Tech Tips


    • When the cable is disconnected from the negative (-) battery terminal, stop and start control is prohibited for a certain amount of time. After connecting the cable, drive the vehicle until stop and start control is permitted (approximately 15 to 40 minutes).

    • 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 GTS to the DLC3.

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

    3. Clear the DTCs Click here.

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

    5. Check that DTCs are not output Click here.

      A01IOYZE05

  2. STOP AND START SYSTEM OPERATION CHECK

    Tech Tips

    When the cable is disconnected from the negative (-) battery terminal, stop and start control is prohibited for a certain amount of time. After connecting the cable, drive the vehicle until stop and start control is permitted (approximately 15 to 40 minutes).


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

    4. 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.

    6. Depress the clutch pedal and start the engine.

WIRING DIAGRAM

A01IRSPE01

INSPECTION PROCEDURE

Note


  • Before replacing the engine stop and start ECU, read the number of starter operations 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 yaw rate sensor, perform deceleration sensor zero point clear and calibration Click here.

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 (ECD SYSTEM)


    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

      Result
      Result Proceed to
      No ECD system DTCs are output A
      ECD system DTC P0335 is output B

    B

    GO TO ECD 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. Read the value displayed on the GTS screen.

      OK
      Engine speed signal is input (the speeds displayed on the tachometer and the GTS are almost the same).

    NG

    CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - ECM) Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here

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


    1. Turn the ignition switch to OFF

    2. Disconnect the A74 engine stop and start ECU connector.

    3. Disconnect the A76 ECM connector.

    4. w/ Entry and Start System:

      Disconnect the power management control ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A74-10 (NE) - A76-6 (NEO) Always Below 1 Ω
      A74-10 (NE) - Body ground Always 10 kΩ or higher
      A76-6 (NEO) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the A73 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
      A73-8 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Connect an oscilloscope to the A74-10 (NE) and A73-8 (GND) terminals of the engine stop and start ECU connector.

      A01IOHTE16
      Text in Illustration
      *a

      Component with harness connected

      (Engine Stop and Start ECU)

      		 - -

    2. Start the engine.

    3. A01ITW1E01

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

      Item Condition
      Tester Connection A74-10 (NE) - A73-8 (GND)
      Tool Setting 5 V/DIV, 2 ms/DIV
      Condition Idling
      Result
      Result Proceed to
      Stuck at 0 to 1.5 V A
      Stuck at 8 to 14 V B
      Pulse generation (See waveform) C

    B

    GO TO ECD SYSTEM Click here

    C

    REPLACE ENGINE STOP AND START ECU Click here

    A

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


    1. Disconnect the ECM connector.

      A01IOHTE16
      Text in Illustration
      *a

      Component with harness connected

      (Engine Stop and Start ECU)

      		 - -

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A74-10 (NE) - A73-8 (GND) Ignition switch ON 8 to 14 V

      Tech Tips

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


    NG

    REPLACE ENGINE STOP AND START ECU Click here

    OK

    GO TO ECD SYSTEM Click here