SFI SYSTEM, Diagnostic DTC:P0335, P0337, P0338, P0339

DTC Code	DTC Name
P0335	Crankshaft Position Sensor "A" Circuit
P0337	Crankshaft Position Sensor "A" Circuit Low Input
P0338	Crankshaft Position Sensor "A" Circuit High Input
P0339	Crankshaft Position Sensor "A" Circuit Intermittent

DESCRIPTION

The crankshaft position sensor system consists of a crankshaft angle sensor rotor and Magnetoresistive Element (MRE) type sensor. The crankshaft angle sensor rotor has 34 teeth at 10° intervals (2 teeth are missing for detecting top dead center), and is installed to the rear end of the crankshaft. The crankshaft position sensor generates 34 signals per crankshaft revolution. The ECM uses the G2 signal to distinguish between the cylinders, and uses the NE signal to detect the crankshaft position and engine speed.

DTC No.	DTC Detection Condition	Trouble Area
P0335	Either condition is met: No crankshaft position sensor signal is sent to the ECM while cranking (1 trip detection logic). No crankshaft position sensor signal is sent to the ECM at an engine speed of 600 rpm or more (1 trip detection logic).	Open or short in crankshaft position sensor circuit Crankshaft position sensor Crankshaft angle sensor rotor ECM
P0337	Output voltage of crankshaft position sensor is 0.3 V or less for 4 seconds (1 trip detection logic).	Open or short in crankshaft position sensor circuit Crankshaft position sensor Crankshaft angle sensor rotor ECM
P0338	Output voltage of crankshaft position sensor is 4.7 V or higher for 4 seconds (1 trip detection logic).	Open or short in crankshaft position sensor circuit Crankshaft position sensor Crankshaft angle sensor rotor ECM
P0339	Under conditions (a), (b) and (c), no crankshaft position sensor signal is sent to the ECM for 0.05 seconds or more (1 trip detection logic): (a) Engine speed is 1000 rpm or more. (b) Starter signal is off. (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 angle sensor rotor ECM

Reference: Inspection using an oscilloscope.

Standard

for RHD
Tester Connection	Tool Setting	Condition	Specified Condition
C46-110 (NE+) - C46-111 (NE-)	5 V/DIV., 20 msec./DIV.	Cranking or idling	The correct waveform is as shown
C46-90 (G2) - C46-89 (G2-)	5 V/DIV., 20 msec./DIV.	Cranking or idling	The correct waveform is as shown

for LHD
Tester Connection	Tool Setting	Condition	Specified Condition
C45-110 (NE+) - C45-111 (NE-)	5 V/DIV., 20 msec./DIV.	Cranking or idling	The correct waveform is as shown
C45-90 (G2) - C45-89 (G2-)	5 V/DIV., 20 msec./DIV.	Cranking or idling	The correct waveform is as shown

Tech Tips

G2 is the camshaft position sensor signal, and NE is the crankshaft position sensor signal.

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.

When the sensor output voltage remains at below 0.3 V, or higher than 4.7 V for more than 4 seconds, the ECM stores a DTC.

CONFIRMATION DRIVING PATTERN

Start the engine and run it at idle for 20 seconds or more.

WIRING DIAGRAM

INSPECTION PROCEDURE

Tech Tips

If no problem is found by this diagnostic troubleshooting procedure, check for problems by referring to the engine mechanical section.
The engine speed can be checked by using the GTS. To perform the check, follow the procedures below:

Connect the GTS to the DLC3.
Start the engine.
Turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Engine Speed.

The engine speed may be indicated as zero despite the engine running normally. This is caused by a lack of NE signals from the crankshaft position sensor. Alternatively, the engine speed may be indicated as lower than the actual engine speed if the crankshaft position sensor output voltage is insufficient.

Read freeze frame data using the GTS. Freeze frame data records the engine conditions when malfunctions are detected. 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

READ VALUE USING GTS (ENGINE SPEED)
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 and ECT / Data List / All Data / Engine Speed.
5. Start the engine.
6. Read the values displayed on the GTS while the engine is running.
  
  Standard
  
  Correct values are displayed.
  Tech Tips
  - To check the engine speed change, display the graph on the GTS.
  - If the engine does not start, check the engine speed while cranking.
  - If the engine speed indicated on the GTS remains zero (0), there may be an open or short in the Crankshaft Position sensor circuit.
NG
INSPECT CRANKSHAFT POSITION SENSOR (SENSOR POWER SOURCE) Click here

OK

CHECK FOR INTERMITTENT PROBLEMS Click here

Standard
Correct values are displayed.

INSPECT CRANKSHAFT POSITION SENSOR (SENSOR POWER SOURCE)

Text in Illustration
*a	Front view of wire harness connector (to Crankshaft Position Sensor)

Disconnect the crankshaft position sensor connector.

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

Standard Voltage

Tester Connection	Switch Condition	Specified Condition
C114-3 (VC) - Body ground	Engine switch on (IG)	4.5 to 5.0 V

CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM) Click here

CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM)

Disconnect the crankshaft position sensor connector.
Disconnect the ECM connector.

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

Standard Resistance

for RHD
Tester Connection	Condition	Specified Condition
C114-1 (NE+) - C46-110 (NE+)	Always	Below 1 Ω
C114-2 (NE-) - C46-111 (NE-)	Always	Below 1 Ω
C114-1 (NE+) or C46-110 (NE+) - Body ground	Always	10 kΩ or higher
C114-2 (NE-) or C46-111 (NE-) - Body ground	Always	10 kΩ or higher

for LHD
Tester Connection	Condition	Specified Condition
C114-1 (NE+) - C45-110 (NE+)	Always	Below 1 Ω
C114-2 (NE-) - C45-111 (NE-)	Always	Below 1 Ω
C114-1 (NE+) or C45-110 (NE+) - Body ground	Always	10 kΩ or higher
C114-2 (NE-) or C45-111 (NE-) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR)
1. Check the crankshaft position sensor installation.
  
  OK
  
  Sensor is installed correctly.
NG
SECURELY REINSTALL SENSOR Click here

OK
INSPECT CRANKSHAFT ANGLE SENSOR ROTOR (TEETH OF SENSOR ROTOR)
1. Check the teeth of the sensor rotor.
  
  OK
  
  Sensor rotor does not have any cracks or deformation.
NG
REPLACE CRANKSHAFT ANGLE SENSOR ROTOR Click here

OK
REPLACE CRANKSHAFT POSITION SENSOR
1. Replace the crankshaft position sensor Click here.
NEXT

OK
Sensor is installed correctly.

OK
Sensor rotor does not have any cracks or deformation.

CHECK WHETHER DTC OUTPUT RECURS (DTC P0335, P0337, P0338 AND/OR P0339)

Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Clear DTCs Click here.
Start the engine.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

Read DTCs.

Result
Result	Proceed to
No DTC is output	A
P0335, P0337, P0338 or P0339 is output	B

Tech Tips

If the engine does not start, replace the ECM.

REPLACE ECM Click here

END

CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM)

Disconnect the crankshaft position sensor connector.
Disconnect the ECM connector.

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

Standard Resistance

for RHD
Tester Connection	Condition	Specified Condition
C114-3 (VC) - C46-66 (VCV2)	Always	Below 1 Ω
C114-3 (VC) or C46-66 (VCV2) - Body ground	Always	10 kΩ or higher

for LHD
Tester Connection	Condition	Specified Condition
C114-3 (VC) - C45-66 (VCV2)	Always	Below 1 Ω
C114-3 (VC) or C45-66 (VCV2) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE ECM Click here