Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001FCPY
Model Year Start: 2019 Model: Corolla Hatchback Prod Date Range: [06/2018 - 03/2019]
Title: M20A-FKS (ENGINE CONTROL): SFI SYSTEM: P033531; Crankshaft Position Sensor "A" No Signal; 2019 - 2020 MY Corolla Corolla Hatchback [06/2018 - 03/2019]

DTC

P033531

Crankshaft Position Sensor "A" No Signal

DESCRIPTION

Refer to DTC P033511.

Click here 2019 - 2020 MY Corolla Corolla Hatchback [06/2018 - 03/2019]; M20A-FKS (ENGINE CONTROL): SFI SYSTEM: P033511; Crankshaft Position Sensor "A" Circuit Short to Ground+

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P033531

Crankshaft Position Sensor "A" No Signal

Diagnosis condition:

  • 3 seconds or more have elapsed after the engine started

Abnormal condition:

  • The engine stalls and the engine speed signal value decreases rapidly.

Malfunction time:

  • -

Trip logic:

  • 1 trip detection logic

Detection conditions:

  • Continuous

Sensors/components used for detection (Main):

  • Crankshaft position sensor

Sensors/components used for detection (Related):

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

Comes on

DTC stored

SAE Code: P0335
  • Reference: Inspection using an oscilloscope.

    Click here 2019 - 2020 MY Corolla Corolla Hatchback [06/2018 - 03/2019]; M20A-FKS (ENGINE CONTROL): SFI SYSTEM: P033511; Crankshaft Position Sensor "A" Circuit Short to Ground+

MONITOR DESCRIPTION

When the engine speed fluctuates abnormally during engine stall judgment, the ECM determines that the crankshaft position sensor circuit is malfunctioning and illuminates the MIL and stores a DTC.(Under normal circumstances, the engine speed gradually decreases.)

MONITOR STRATEGY

Related DTCs

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

-

MIL Operation

Immediate

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

Monitor runs whenever the following DTCs are not stored

None

All of the following conditions are met

-

Battery voltage

Higher than 6 V

Crankshaft position sensor voltage

0.3 to 4.7 V

Starter

Off

Engine speed (Top dead center)

600 rpm or higher

Engine speed (30°CA)

600 rpm or higher

TYPICAL MALFUNCTION THRESHOLDS

Crankshaft position sensor signal

No signal

CONFIRMATION DRIVING PATTERN

Refer to DTC P03351F.

Click here 2019 - 2020 MY Corolla Corolla Hatchback [06/2018 - 03/2019]; M20A-FKS (ENGINE CONTROL): SFI SYSTEM: P03351F; Crankshaft Position Sensor "A" Circuit Intermittent+

WIRING DIAGRAM

Refer to DTC P033511.

Click here 2019 - 2020 MY Corolla Corolla Hatchback [06/2018 - 03/2019]; M20A-FKS (ENGINE CONTROL): SFI SYSTEM: P033511; Crankshaft Position Sensor "A" Circuit Short to Ground+

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. Turn the engine switch on (IG).
    3. Turn the Techstream 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 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.

CHECK DTC OUTPUT (DTC P033531 AND P033511 OR P033515)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine / Trouble Codes.

(e) Read the DTCs.

Powertrain > Engine > Trouble Codes

Result

Proceed to

DTC P033531 is output

A

DTC P033531 and P033511 or P033515 are output

B

HINT:

  • If DTC P033511 or P033515 is output, perform troubleshooting for it first.
B

GO TO DTC CHART 2019 MY Corolla Corolla Hatchback [06/2018 - 01/2019]; M20A-FKS (ENGINE CONTROL): SFI SYSTEM: DIAGNOSTIC TROUBLE CODE CHART 2020 MY Corolla Corolla Hatchback [01/2019 - 03/2019]; M20A-FKS (ENGINE CONTROL): SFI SYSTEM: DIAGNOSTIC TROUBLE CODE CHART

A

2.

CHECK TERMINAL VOLTAGE AND INTERNAL RESISTANCE (CRANKSHAFT POSITION SENSOR AND ECM)

*a

Front view of wire harness connector

(to Crankshaft Position Sensor)

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 engine switch on (IG).

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

Z4-3 (VCNE) - Body ground

Engine switch on (IG)

4.5 to 5.5 V

Z4-1 (NE+) - Body ground

Engine switch on (IG)

3.0 to 5.0 V

(d) Turn the engine switch off.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

Z4-2 (NE-) - Body ground

Engine switch off

Below 1 Ω
NG

GO TO STEP 5

OK

3.

INSPECT CRANKSHAFT POSITION SENSOR

(a) Remove the crankshaft position sensor.

Click here 2019 MY Corolla Corolla Hatchback [06/2018 - 01/2019]; M20A-FKS (ENGINE CONTROL): CRANKSHAFT POSITION SENSOR: REMOVAL 2020 MY Corolla Corolla Hatchback [01/2019 - 03/2019]; M20A-FKS (ENGINE CONTROL): CRANKSHAFT POSITION SENSOR: REMOVAL

(b) Confirm that there is no oil on the connecting parts of the crankshaft position sensor connector.

OK:

There is no oil on the connecting parts of the crankshaft position sensor connector

NG

REPLACE CRANKSHAFT POSITION SENSOR 2019 MY Corolla Corolla Hatchback [06/2018 - 01/2019]; M20A-FKS (ENGINE CONTROL): CRANKSHAFT POSITION SENSOR: REMOVAL 2020 MY Corolla Corolla Hatchback [01/2019 - 03/2019]; M20A-FKS (ENGINE CONTROL): CRANKSHAFT POSITION SENSOR: REMOVAL

OK

4.

INSPECT CRANKSHAFT POSITION SENSOR

*a

Component without harness connected

(Crankshaft Position Sensor)

(a) Disconnect the crankshaft position sensor connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

3 (VCNE) - 1 (NE+)

Always

10 kΩ or higher

3 (VCNE) - 2 (NE-)

Always

10 kΩ or higher

1 (NE+) - 2 (NE-)

Always

10 kΩ or higher
OK

REPLACE ECM 2019 MY Corolla Corolla Hatchback [06/2018 - 01/2019]; M20A-FKS (ENGINE CONTROL): ECM: REMOVAL 2020 MY Corolla Corolla Hatchback [01/2019 - 03/2019]; M20A-FKS (ENGINE CONTROL): ECM: REMOVAL

NG

REPLACE CRANKSHAFT POSITION SENSOR 2019 MY Corolla Corolla Hatchback [06/2018 - 01/2019]; M20A-FKS (ENGINE CONTROL): CRANKSHAFT POSITION SENSOR: REMOVAL 2020 MY Corolla Corolla Hatchback [01/2019 - 03/2019]; M20A-FKS (ENGINE CONTROL): CRANKSHAFT POSITION SENSOR: REMOVAL

5.

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

Z4-3 (VCNE) - C76-116 (VCNE)

Always

Below 1 Ω

Z4-1 (NE+) - C76-93 (NE+)

Always

Below 1 Ω

Z4-2 (NE-) - C76-115 (NE-)

Always

Below 1 Ω

Z4-3 (VCNE) or C76-116 (VCNE) - Body ground and other terminals

Always

10 kΩ or higher

Z4-1 (NE+) or C76-93 (NE+) - Body ground and other terminals

Always

10 kΩ or higher

Z4-2 (NE-) or C76-115 (NE-) - Body ground and other terminals

Always

10 kΩ or higher
OK

REPLACE ECM 2019 MY Corolla Corolla Hatchback [06/2018 - 01/2019]; M20A-FKS (ENGINE CONTROL): ECM: REMOVAL 2020 MY Corolla Corolla Hatchback [01/2019 - 03/2019]; M20A-FKS (ENGINE CONTROL): ECM: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR