Dtc P0335 Crankshaft Position Sensor A Circuit

Engine. Lexus Gs430, Gs300. Uzs190 Grs190
3Uz-Fe Engine Control System. Lexus Gs430, Gs300. Uzs190 Grs190

DESCRIPTION

MONITOR DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT CRANKSHAFT POSITION SENSOR

CHECK WIRE HARNESS (CRANKSHAFT POSITION SENSOR - ECM)

CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR)

CHECK CRANKSHAFT TIMING PULLEY (TEETH OF PLATE)

DTC P0335 Crankshaft Position Sensor "A" Circuit

DTC P0339 Crankshaft Position Sensor "A" Circuit Intermittent


DESCRIPTION

The crankshaft position sensor system consists of a crankshaft position sensor plate and a magnetic coil.
The sensor plate has 34 teeth and is installed on the crankshaft. The pickup coil is made of windings, an iron core and magnet. The sensor plate rotates and as each tooth passes through the pickup coil, a pulse signal is created. The pickup coil generates 34 signals for each engine revolution. Based on these signals, the ECM calculates the crankshaft position and engine RPM. Using these calculations, the fuel injection time and ignition timing are controlled.

DTC No.
DTC Detection Condition
Trouble Area
P0335
No crankshaft position sensor signal to ECM during cranking (2 trip detection logic)
  1. Open or short in crankshaft position sensor circuit
  2. Crankshaft position sensor
  3. Crankshaft timing pulley
  4. ECM
P0335
No crankshaft position sensor signal to ECM with engine at 450 rpm or more (2 trip detection logic)
  1. Open or short in crankshaft position sensor circuit
  2. Crankshaft position sensor
  3. Crankshaft timing pulley
  4. ECM
P0339
No crankshaft position sensor signal to ECM is input for 0.05 seconds or more, and conditions (a) and (b) are met:
(a) 1,000 rpm or more
(b) Starter is OFF
  1. Open or short in crankshaft position sensor circuit
  2. Crankshaft position sensor
  3. Crankshaft timing pulley
  4. ECM

  1. Lexus Gs430, Gs300. Uzs190 Grs190.3Uz-Fe Engine Control System.Sfi System. Dtc P0335 Crankshaft Position Sensor A Circuit
    Reference: Inspection using an oscilloscope.
    The correct waveform is as shown.
    Tester Connection
    		Specified Condition
    E8-19 (VV1+) - E8-31 (NE-)
    		Correct waveform is as shown
    E6-19 (VV2+) - E8-31 (NE-)
    		Correct waveform is as shown
    E8-32 (NE+) - E8-31 (NE-)
    		Correct waveform is as shown

MONITOR DESCRIPTION

If there is no signal from the crankshaft position sensor even though the engine is revolving, the ECM interprets this as a malfunction of the sensor.
This monitor runs for 10 seconds (the first 10 seconds of engine idle) after the engine is started.

WIRING DIAGRAM


Lexus Gs430, Gs300. Uzs190 Grs190.3Uz-Fe Engine Control System.Sfi System. Dtc P0335 Crankshaft Position Sensor A Circuit


INSPECTION PROCEDURE

HINT:
  1. Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, if the air-fuel ratio was LEAN or RICH, and other data from the time the malfunction occurred.
  2. The engine speed can be confirmed in the Data List using the intelligent tester. Enter the following menus: Powertrain / Engine / Data List / Primary / Engine Speed. If no NE signals are sent from the crankshaft position sensor even though the engine is running, the engine speed will be indicated as zero. If the voltage output of the crankshaft position sensor is insufficient, the engine speed will be indicated as lower than the actual RPM.
1.INSPECT CRANKSHAFT POSITION SENSOR
Lexus Gs430, Gs300. Uzs190 Grs190.3Uz-Fe Engine Control System.Sfi System. Dtc P0335 Crankshaft Position Sensor A Circuit

  1. Disconnect the E3 crankshaft position sensor connector.

  1. Measure the resistance of the sensor.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1 - 2
    		Cold
    		1,630 to 2,740 Ω
    1 - 2
    		Hot
    		2,065 to 3,225 Ω
    NOTICE:
    In the above section, the terms "cold" and "hot" refer to the temperature of the coils.
    "Cold" means approximately -10 to 50°C (14 to 122°F).
    "Hot" means approximately 50 to 100°C (122 to 212°F).


NG
REPLACE CRANKSHAFT POSITION SENSOR
OK


2.CHECK WIRE HARNESS (CRANKSHAFT POSITION SENSOR - ECM)
Lexus Gs430, Gs300. Uzs190 Grs190.3Uz-Fe Engine Control System.Sfi System. Dtc P0335 Crankshaft Position Sensor A Circuit

  1. Disconnect the E3 crankshaft position sensor connector.

  1. Disconnect the E8 ECM connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    E3-1 - E8-32 (NE+)
    		Below 1 Ω
    E3-2 - E8-31 (NE-)
    		Below 1 Ω
    E3-1 or E8-32 (NE+) - Body ground
    		10 kΩ or higher
    E3-2 or E8-31 (NE-) - Body ground
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


3.CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR)
Lexus Gs430, Gs300. Uzs190 Grs190.3Uz-Fe Engine Control System.Sfi System. Dtc P0335 Crankshaft Position Sensor A Circuit

  1. Check the sensor installation.

    OK:
    Sensor is installed correctly.


NG
SECURELY REINSTALL SENSOR
OK


4.CHECK CRANKSHAFT TIMING PULLEY (TEETH OF PLATE)

  1. Check the teeth of the crankshaft timing pulley.

    OK:
    Timing pulley's teeth have no deformation or cracks.


NG
REPLACE CRANKSHAFT TIMING PULLEY
OK

REPLACE ECM