Toyota Yaris: Sfi System / Crankshaft Position Sensor "A" Circuit Intermittent (P03351F,P03352A,P033531)

• Reference: Inspection using an oscilloscope.

  Click here

• 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).

1. Connect the GTS to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the GTS on.
4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
5. Turn the ignition switch off and wait for at least 30 seconds.
6. Start the engine.
7. Idle the engine for 20 seconds or more [A].
8. Run the engine at an engine speed of 1000 rpm for 5 seconds or more [B].
9. Turn the GTS on.
10. Enter the following menus: Powertrain / Engine / Trouble Codes [C].
11. 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.
12. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
13. Input the DTC: P03351F, P03352A or P033531.
14. Check the DTC judgment result.

    GTS 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 is NORMAL, the system is normal.
    • If the judgment result is ABNORMAL, the system has a malfunction.
    • If the judgment result is INCOMPLETE, perform steps [A] through [C] again.

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 GTS. To perform the check, follow the procedures below:
  1. Connect the GTS to the DLC3.
  2. Turn the ignition switch to ON.
  3. Turn the GTS on.
  4. Enter the following menus: Powertrain / Engine / Data List / Engine Speed.
  5. Start the engine.
  • 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. 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.

HINT:

• 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 at zero (0), there may be an open or short in the crankshaft position sensor circuit.

Crankshaft Position Sensor "A" Circuit Short to Ground (P033511,P033515)

DESCRIPTION The crankshaft position sensor system consists of a crankshaft position sensor plate and Magneto-Resistive 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...

Camshaft Position Sensor "A" Bank 1 or Single Sensor No Signal (sub) (P034000)

DESCRIPTION Refer to DTC P034011. Click here DTC No. Detection Item DTC Detection Condition Trouble Area MIL Note P034000 Camshaft Position Sensor "A" Bank 1 or Single Sensor No Signal (sub) No camshaft position sensor (for intake camshaft) signal to the sub ECM while engine running ECM Comes on SAE: P0340 MONITOR DESCRIPTION While the engine is running, when the VV1 (VV2) signal is not input to the sub CPU even though the VV1 (VV2) signal is input to the main CPU, the ECM judges that a malfunction has occurred in an internal ECM circuit, and illuminates the MIL and stores a DTC...

Other information:

Toyota Yaris XP210 (2020-2025) Reapir and Service Manual: Pre-ignition Detected (P137800)

DESCRIPTION If sudden early ignition (pre-ignition) occurs continuously in a short period of time, a DTC is stored. This pre-ignition is a phenomenon inherent in boosted engines. Atomized engine oil and detached deposits (carbon) cause ignition and promote knocking during low-speed, high-output operation...

Toyota Yaris XP210 (2020-2025) Owner's Manual: Rear Window Defogger

The rear window defogger clears fog from the rear window. The ignition must be switched ON to use the defogger. Press the switch to turn on the rear window defogger. The rear window defogger operates for about 15 minutes and then turns off automatically...