STOP AND START SYSTEM(for 3ZR-FAE), 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

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

CONFIRMATION AFTER TROUBLESHOOTING
Tech Tips
- If the cable is disconnected from the negative (-) battery terminal, stop and start control is prohibited until refresh charge is completed. In this case, drive the vehicle approximately 5 to 40 minutes until refresh charge is completed and stop and start control operation is permitted.
- 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 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 wait for at least 15 seconds.
5. Check that DTCs are not output.
  
  Click here
  
  Powertrain > Stop and Start > Trouble Codes
STOP AND START SYSTEM OPERATION CHECK

Tech Tips

If the cable is disconnected from the negative (-) battery terminal, stop and start control is prohibited until refresh charge is completed. In this case, drive the vehicle approximately 5 to 40 minutes until refresh charge is completed and stop and start control operation is permitted.
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

CAUTION / NOTICE / HINT

Note

When replacing the engine stop and start ECU with a new one, make sure to download the previous status (number of starter operations) of the old engine stop and start ECU. After replacing the engine stop and start ECU, turn the ignition switch to ON and wait 20 seconds, then confirm that "OK" is displayed for the Data List item "Oper Prohibition (O/P Air Bleeding)". Then upload the previous status (number of starter operations) to the 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

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

CHECK DTC OUTPUT (SFI SYSTEM)

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

Powertrain > Engine and ECT > Trouble Codes

Read the DTCs

Result

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

GO TO SFI SYSTEM Click here

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

Connect the GTS to the DLC3
Start the engine.
Turn the GTS on.
Enter the following menus: Powertrain / Stop and Start / Data List / Engine Spd (NE Signal).

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

USE SIMULATION METHOD TO CHECK Click here

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

Turn the ignition switch off.
Disconnect the A66 engine stop and start ECU connector.
Disconnect the A62 ECM connector.
w/ Entry and Start System:

Disconnect the G82 certification ECU (smart key ECU assembly) connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
A66-10 (NE) - A62-30 (NEO)	Always	Below 1 Ω
A66-10 (NE) - Body ground	Always	10 kΩ or higher
A62-30 (NEO) - Body ground	Always	10 kΩ or higher

Result

Proceed to
OK
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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

Disconnect the A65 engine stop and start ECU connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
A65-8 (GND) - Body ground	Always	Below 1 Ω

Result

Proceed to
OK
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK ENGINE STOP AND START ECU (NE SIGNAL INPUT)

Connect an oscilloscope to terminals A66-10 (NE) and A65-8 (GND).

*a
Component with harness connected

(Engine Stop and Start ECU)
- -
Start the engine.


*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) - A65-8 (GND)
Tool Setting	5 V/DIV., 2 ms./DIV.
Condition	Idling with warm engine

Result

Proceed to

Pulse generation

(See waveform)

Stuck at 0 to 1.5 V

Stuck at 8 to 14 V

REPLACE ENGINE STOP AND START ECU Click here

GO TO SFI SYSTEM Click here

CHECK ENGINE STOP AND START ECU (NE TERMINAL VOLTAGE)

Disconnect the A62 ECM connector.

*a
Component with harness connected

(Engine Stop and Start ECU)
- -
Turn the ignition switch to ON.

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

Standard Voltage

Tester Connection	Condition	Specified Condition
A66-10 (NE) - A65-8 (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.

Result

Proceed to
OK
NG

GO TO SFI SYSTEM Click here

REPLACE ENGINE STOP AND START ECU Click here