2GR-FKS (ENGINE CONTROL): SFI SYSTEM: P033511,P033515,P03351F,P03352A,P033531; Crankshaft Position Sensor "A" Circuit Short to Ground; 2018 - 2020 MY Sienna [11/2017

The crankshaft position sensor system consists of a crankshaft position sensor plate and Magneto Resistance Element (MRE) type sensor. The crankshaft position sensor plate has 34 teeth at 10° intervals (2 teeth are missing for detecting top dead center), and is installed on the crankshaft. The crankshaft position sensor generates 34 signals per crankshaft revolution. The ECM uses the NE signal to detect the crankshaft position and engine speed.

Reference: Inspection using an oscilloscope.

HINT:

The correct waveform is as shown.

ECM Terminal Name	Between NE+ and NE-
Tester Range	2 V/DIV., 20 ms./DIV.
Condition	Idling with warm engine

MONITOR DESCRIPTION

The crankshaft position sensor signal (NE signal) is not received by the ECM when the engine is being cranked.
The crankshaft position sensor signal (NE signal) is not received by the ECM when the engine is running.
The engine stalls and the engine speed signal value decreases rapidly (under normal conditions the engine speed will decrease gradually).
The crankshaft position sensor output voltage is above or below the threshold.

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

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

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

P0337 and P0338: Crankshaft Position Sensor Range Check (Low Voltage, High Voltage)

TYPICAL MALFUNCTION THRESHOLDS

P0335: Crankshaft Position Sensor Verify Pulse Input (Case 1 and Case 2)

P0337: Crankshaft Position Sensor Range Check (Low Voltage)

P0338: Crankshaft Position Sensor Range Check (High Voltage)

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

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).
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 [A].
Idle the engine for 20 seconds or more [B].
Enter the following menus: Powertrain / Engine / Trouble Codes [C].
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: P033511, P033515, P03351F, P03352A or P033531.

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

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, perform steps [A] and [B] again.
[A] to [C]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
When clearing the permanent DTCs, do not disconnect the cable from the battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

HINT:

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 Techstream. To perform the check, follow the procedures 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 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 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

(h) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.