Toyota Yaris: Sfi System / Crankshaft Position Sensor "A" Circuit Short to Ground (P033511,P033515)

Toyota Yaris XP210 (2020-2022) Reapir and Service Manual / Engine & Hybrid System / G16e-gts (engine Control) / Sfi System / 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. The crankshaft position sensor generates 34 signals per crankshaft revolution. The ECM uses the crankshaft position sensor signal (NE signal) to detect the crankshaft position and engine speed.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Note

P033511

Crankshaft Position Sensor "A" Circuit Short to Ground

The crankshaft position sensor output voltage is less than 0.3 V for 4 seconds or more (1 trip detection logic).

  • Open or short in crankshaft position sensor circuit
  • Crankshaft position sensor
  • ECM

Comes on

SAE: P0337

P033515

Crankshaft Position Sensor "A" Circuit Short to Battery or Open

The crankshaft position sensor output voltage is higher than 4.7 V for 4 seconds or more (1 trip detection logic).

  • Open or short in crankshaft position sensor circuit
  • Crankshaft position sensor
  • ECM

Comes on

SAE: P0338

  • 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

If the output voltage transmitted by the crankshaft position sensor remains low or high, the ECM interprets this as a malfunction in the sensor circuit, illuminates the MIL and stores a DTC.

MONITOR STRATEGY

Required Sensors/Components (Main)

Crankshaft position sensor

Required Sensors/Components (Related)

Camshaft position sensor

Frequency of Operation

Continuous

CONFIRMATION DRIVING PATTERN

  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. Turn the ignition switch to ON.
  7. Turn the GTS on.
  8. Start the engine.
  9. Idle the engine for 20 seconds or more.
  10. Enter the following menus: Powertrain / Engine / Trouble Codes.
  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: P033511 or P033515.
  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.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

HINT:

  • 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.

PROCEDURE

1.

READ VALUE USING GTS (ENGINE SPEED)

(a) Enter the following menus.

Powertrain > Engine > Data List

Tester Display

Engine Speed

(b) Start the engine.

(c) Read the values displayed on the GTS while the engine is running.

Standard:

Correct values are displayed.

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.
OK

CHECK FOR INTERMITTENT PROBLEMS

NG

2.

CHECK HARNESS AND CONNECTOR

HINT:

Make sure that the connector is properly connected. If it is not, securely connect it and check for DTCs again.

(a) Disconnect the crankshaft position sensor connector.

(b) Turn the ignition switch to ON.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

f1-3(VCNE) - Body ground

Ignition switch ON

4.5 to 5.5 V

f1-1(NE+) - Body ground

Ignition switch ON

3.0 to 5.0 V

*a

Front view of wire harness connector

(to Crankshaft Position Sensor)

(d) Turn the ignition switch off and wait for at least 30 seconds.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

f1-3(VCNE) - f1-1(NE+)

Ignition switch off

1.425 to 1.575 kΩ

f1-2(NE-) - Body ground

Always

Below 1 Ω

OK

REPLACE CRANKSHAFT POSITION SENSOR

NG

3.

CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM)

(a) Disconnect the crankshaft position sensor connector.

(b) Disconnect the ECM connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

f1-3(VCNE) - D104-116(VCNE)

Always

Below 1 Ω

f1-1(NE+) - D104-92(NE+)

Always

Below 1 Ω

f1-2(NE-) - D104-115(NE-)

Always

Below 1 Ω

f1-3(VCNE) or D104-116(VCNE) - Body ground and other terminals

Always

10 kΩ or higher

f1-1(NE+) or D104-92(NE+) - Body ground and other terminals

Always

10 kΩ or higher

f1-2(NE-) or D104-115(NE-) - Body ground and other terminals

Always

10 kΩ or higher

OK

REPLACE ECM

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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    Categories

    Break-In Period

    No special break-in is necessary, but a few precautions in the first 600 miles (1,000 km) may add to the performance, economy, and life of the vehicle.

    Do not race the engine. Do not maintain one constant speed, either slow or fast, for a long period of time. Do not drive constantly at full-throttle or high engine rpm for extended periods of time. Avoid unnecessary hard stops. Avoid full-throttle starts.

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