Toyota Venza: Crankshaft Position Sensor "A" Circuit (P0335,P0339)

Toyota Venza Service Manual / 1ar-fe Engine Control / Sfi System / Crankshaft Position Sensor "A" Circuit (P0335,P0339)

DESCRIPTION

The crankshaft position sensor system consists of a crank angle sensor plate and a pickup coil.

The sensor plate has 34 teeth and is installed on the crankshaft. The pickup coil is made of wound copper wire, an iron core and magnet. The sensor plate rotates and, as each tooth passes by the pickup coil, a pulse signal is created. The pickup coil generates 34 signals per crankshaft revolution. Based on these signals, the ECM calculates the crankshaft position and engine speed. Using these calculations, the fuel injection time and ignition timing are controlled.

DTC No.	DTC Detection Condition	Trouble Area
P0335	One of the following condition is met (1 trip detection logic): No crankshaft position sensor signal to ECM while cranking No crankshaft position sensor signal to ECM while engine running Missing crankshaft position sensor signal despite camshaft position sensor signal inputs normal after engine cranked	Open or short in crankshaft position sensor circuit Crankshaft position sensor Crankshaft (crank angle sensor plate) ECM
P0339	All of the following conditions are met (1 trip detection logic): (a) The engine speed is 1000 rpm or more. (b) No crankshaft position sensor signal for 0.05 seconds or more. (c) 3 seconds or more have elapsed since the starter signal switched from ON to OFF.	Open or short in crankshaft position sensor circuit Crankshaft position sensor Crankshaft (crank angle sensor plate) ECM

DTC No.

DTC Detection Condition

Trouble Area

P0335

One of the following condition is met (1 trip detection logic):

No crankshaft position sensor signal to ECM while cranking

No crankshaft position sensor signal to ECM while engine running
Missing crankshaft position sensor signal despite camshaft position sensor signal inputs normal after engine cranked

Open or short in crankshaft position sensor circuit
Crankshaft position sensor
Crankshaft (crank angle sensor plate)
ECM

P0339

All of the following conditions are met (1 trip detection logic):

(a) The engine speed is 1000 rpm or more.

(b) No crankshaft position sensor signal for 0.05 seconds or more.

Open or short in crankshaft position sensor circuit
Crankshaft position sensor
Crankshaft (crank angle sensor plate)
ECM

Reference: Inspection using an oscilloscope.

HINT:

Grounding failure of the shielded wire may cause noise in waveforms.

Terminal No. (Symbol)	Tool Setting	Condition
B58-74 (NE+) - B58-120 (NE-)	5 V/DIV, 20 ms/DIV	Idling

MONITOR DESCRIPTION

If there is no signal from the crankshaft position sensor despite the crankshaft revolving, the ECM interprets this as a malfunction of the sensor.

MONITOR STRATEGY

Related DTCs	P0335: Crankshaft Position Sensor Range Check/Rationality P0335: Crankshaft Position Sensor Verify Pulse Input
Required Sensors/Components (Main)	Crankshaft position sensor
Required Sensors/Components (Related)	Camshaft position sensor
Frequency of Operation	Continuous
Duration	-: Verify pulse input case 1 4.7 seconds: Verify pulse input case 2 0.016 seconds: Range check/rationality
MIL Operation	Immediate
Sequence of Operation	None

TYPICAL ENABLING CONDITIONS

P0335: Crankshaft Position Sensor Range Check/Rationality

Monitor runs whenever the following DTCs are not stored	None
All of the following conditions are met	-
Time after starter OFF to ON	3 seconds or more
Number of camshaft position sensor signal pulses	6 times
Battery voltage	7 V or higher
Minimum battery voltage while starter ON	Below 11 V
Camshaft position sensor circuit fail	Not detected

P0335: Crankshaft Position Sensor Verify Pulse Input (Case 1)

Monitor runs whenever the following DTCs are not stored	None
All of the following conditions are met	-
Starter	OFF
Engine speed	600 rpm or more
Time after starter ON to OFF	3 seconds or more

P0335: Crankshaft Position Sensor Verify Pulse Input (Case 2)

Monitor runs whenever the following DTCs are not stored	None
Both of the following conditions are met	-
Starter	ON
Minimum battery voltage while starter ON	Below 11 V

TYPICAL MALFUNCTION THRESHOLDS

P0335: Crankshaft Position Sensor Range Check/Rationality

Number of crankshaft position sensor signal pulses

132 times or less, and 174 times or more

P0335: Crankshaft Position Sensor Verify Pulse Input

Crankshaft position sensor signal

No signal

COMPONENT OPERATING RANGE

Crankshaft position sensor

Crankshaft position sensor output voltage fluctuates while crankshaft revolving
34 crankshaft position sensor signals per crankshaft revolution

CONFIRMATION DRIVING PATTERN

Connect the Techstream to the DLC3.
Turn the ignition switch to ON and turn the Techstream on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure) (See page ).

Turn the ignition switch off and wait for at least 30 seconds.
Turn the ignition switch to ON and turn the Techstream on.
Start the engine.
Idle the engine for 20 seconds or more [A].
Enter the following menus: Powertrain / Engine / Trouble Codes [B].
Read the Pending DTCs.
HINT:
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
Enter the following menus: Powertrain / Engine / Utility / All Readiness.
Input the DTC: P0335 or P0339.

Check the DTC judgment result.

Techstream Display	Description
NORMAL	DTC judgment completed System normal
ABNORMAL	DTC judgment completed System abnormal
INCOMPLETE	DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions
N/A	Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

HINT:

If the judgment result shows NORMAL, the system is normal.
If the judgment result shows ABNORMAL, the system has a malfunction.
If the judgment result shows INCOMPLETE or N/A, perform steps [A] and [B] again.

If no pending DTC is output, perform a universal trip and check for permanent DTCs (See page ).
HINT:
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

HINT:

After performing the inspection procedure for the crankshaft position sensor, if DTC P0335 is output again, check the following items related to the camshaft position sensor.
- Installation condition of the camshaft position sensor
- Installation condition of the camshaft
- Connection of the camshaft position sensor connector
If no problem is found through this diagnostic troubleshooting procedure, there may be a mechanical problem with the engine.
Check the engine speed. The engine speed can be checked by using the Techstream. To check, follow the procedure below:
1. Connect the Techstream to the DLC3.
2. Start the engine.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Data List / Engine Speed.
- The engine speed may be indicated as zero despite the crankshaft revolving normally. This is caused by a lack of NE signals from the crankshaft position sensor. Alternatively, the engine speed may be indicated as less than the actual engine speed if the crankshaft position sensor output voltage is insufficient.
Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, 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.

PROCEDURE

1.	READ VALUE USING TECHSTREAM (ENGINE SPEED)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Enter the following menus: Powertrain / Engine / Data List / Engine Speed.

(e) Start the engine.

(f) Read the values displayed on the Techstream while the engine is running.

OK:

Correct values are displayed.

HINT:

To check the engine speed change, display the graph on the Techstream.
If the engine does not start, check the engine speed while cranking.
If the engine speed indicated on the Techstream remains at zero (0), there may be an open or short in the crankshaft position sensor circuit.

CHECK FOR INTERMITTENT PROBLEMS

2.	INSPECT CRANKSHAFT POSITION SENSOR (RESISTANCE)

(a) Inspect the crankshaft position sensor (See page ).

REPLACE CRANKSHAFT POSITION SENSOR

3.	CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM)

(a) Disconnect the crankshaft position sensor connector.

(b) Disconnect the ECM connector.

Standard Resistance (Check for Open):

Tester Connection	Condition	Specified Condition
B35-1 - B58-74 (NE+)	Always	Below 1 Ω
B35-2 - B58-120 (NE-)	Always	Below 1 Ω

Standard Resistance (Check for Short):

Tester Connection	Condition	Specified Condition
B35-1 or B58-74 (NE+) - Body ground	Always	10 kΩ or higher
B35-2 or B58-120 (NE-) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR)

(a) Check the crankshaft position sensor installation.

OK:

Sensor is installed correctly.

SECURELY REINSTALL SENSOR

5.	INSPECT CRANKSHAFT (TEETH OF CRANK ANGLE SENSOR PLATE)

(a) Check the teeth of the crank angle sensor plate.

OK:

Crank angle sensor plate does not have any cracks or deformation.

REPLACE ECM

REPLACE CRANKSHAFT

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