Toyota Corolla Cross: Crankshaft Position Sensor "A" Circuit Intermittent (P03351F)

DESCRIPTION

Refer to DTC P033511.

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• Reference: Inspection using an oscilloscope.

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MONITOR DESCRIPTION

When the engine is running and no crankshaft position sensor signal is received for 0.05 seconds or more, the ECM determines that the crankshaft position sensor circuit is malfunctioning and stores a DTC.

MONITOR STRATEGY

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.

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• When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.

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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 [A].
7. Run the engine at an engine speed of 1000 rpm for 5 seconds or more [B].
8. Turn the GTS on.
9. Enter the following menus: Powertrain / Engine / Trouble Codes [C].
10. 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.
11. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
12. Proceed to the next screen and enter the DTC to be checked.
13. 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.
    • [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 auxiliary 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

Refer to DTC P033511.

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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 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

(a) Read the DTCs.

HINT:

If DTC P033511, P033515 or P033531 is output, perform troubleshooting for those DTCs first.

B

GO TO DTC CHART

A

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) While jiggling the ECM connector, measure the voltage according to the table below.

Standard Voltage:

HINT:

By jiggling the connector while performing the inspection, it is possible to confirm that the terminals are contacting with sufficient pressure.

(d) Turn the ignition switch off.

(e) While jiggling the ECM connector, measure the resistance according to the table below.

Standard Resistance:

HINT:

By jiggling the connector while performing the inspection, it is possible to confirm that the terminals are contacting with sufficient pressure.

NG

GO TO STEP 4

OK

(a) Visually check the crankshaft position sensor for damage.

(b) Check the crankshaft position sensor installation condition.

OK:

The crankshaft position sensor does not have any damage and is installed properly.

OK

REPLACE CRANKSHAFT POSITION SENSOR

NG

SECURELY REINSTALL CRANKSHAFT POSITION SENSOR

(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:

OK

REPLACE ECM

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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