Code No. P0335: Crank Angle Sensor System


OPERATION



  • Output signal is supplied to the engine-ECU connector terminal SGT from the crank angle sensor connector terminal and is earthed to the engine-ECU connector terminal SGTE from the crank angle sensor connector terminal.
  • A power voltage of 5 V is applied to the crank angle sensor connector terminal from the engine-ECU connector terminal 5V.

FUNCTION



  • The crank angle sensor detects the crank angle and inputs a pulse signal to the engine-ECU.
  • In response to the signal, the engine-ECU controls the injector, etc.

TROUBLE JUDGMENT


Check Condition, Judgement Criterion
  • Normal signal pattern has not been input for cylinder identification from the crank angle sensor signal and camshaft position sensor signal for 2 seconds.
Check Condition
  • Engine is being cranked.
Judgement Criterion
  • Crank angle sensor output voltage has not changed (no pulse signal is input) for 2 seconds.

FAIL-SAFE AND BACKUP FUNCTION



  • None

PROBABLE CAUSES



  • Failed crank angle sensor
  • Open/short circuit or harness damage in crank angle sensor circuit or loose connector contact
  • Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III data list

  • Data list reference table (Refer to ).

  1. Item 2: Crank angle sensor

Q. Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).
Go to Step 2.

STEP 2. Perform voltage measurement at crank angle sensor connector.

  • Disconnect connector, and measure at harness side.
  • Ignition switch: "ON"
  • Voltage between terminal engine-ECU SGT line and body earth.
OK: 4.9 - 5.1 V

Q. Is the check result normal?
Go to Step 5.
Go to Step 3.

STEP 3. Check harness between crank angle sensor connector terminal and engine-ECU connector terminal SGT.

  • Check output line for open/short circuit.

Q. Is the check result normal?
Go to Step 4.
Repair or replace the connector, or repair the damaged harness wire.

STEP 4. M.U.T.-III data list

  • Data list reference table (Refer to ).

  1. Item 2: Crank angle sensor

Q. Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).
Replace the engine-ECU.

STEP 5. Perform voltage measurement at crank angle sensor connector.

  • Disconnect connector, and measure at harness side.
  • Ignition switch: "ON"
  • Voltage between terminal engine-ECU 5V line and body earth.
OK: 4.9 - 5.1 V

Q. Is the check result normal?
Go to Step 7.
Go to Step 6.

STEP 6. Check harness between crank angle sensor connector terminal and engine-ECU connector terminal 5V.

  • Check power supply line for open/short circuit.

Q. Is the check result normal?
Go to Step 4.
Repair or replace the connector, or repair the damaged harness wire.

STEP 7. Perform resistance measurement at crank angle sensor connector.

  • Disconnect connector, and measure at harness side.
  • Resistance between terminal engine-ECU SGTE line and body earth.
OK: Continuity (2 Ω or less)

Q. Is the check result normal?
Go to Step 9.
Go to Step 8.

STEP 8. Check harness between crank angle sensor connector terminal and engine-ECU connector terminal SGTE.

  • Check earthing line for open circuit and damage.

Q. Is the check result normal?
Go to Step 4.
Repair or replace the connector, or repair the damaged harness wire.

STEP 9. Perform output wave pattern measurement at crank angle sensor connector (Using an oscilloscope).

  • Use special tool test harness (MB991709) to connect connector, and measure at pick-up harness.
  • Engine: Idling
  • Transmission: Neutral <M/T> or P range <CVT>
  • Voltage between terminal engine-ECU SGT line and earth.
OK: Waveforms should be displayed on inspection procedure using an oscilloscope (Refer to ), its maximum value should be 4.8 V or more, and its minimum value should be 0.6 V or less. There must be no noise in the output wave pattern.

Q. Is the check result normal?
Go to Step 4.
Go to Step 10.

STEP 10. Check harness between crank angle sensor connector terminal and engine-ECU connector terminal 5V.

  • Check power supply line for damage.

Q. Is the check result normal?
Go to Step 11.
Repair or replace the connector, or repair the damaged harness wire.

STEP 11. Check harness between crank angle sensor connector terminal and engine-ECU connector terminal SGT.

  • Check output line for damage.

Q. Is the check result normal?
Go to Step 12.
Repair or replace the connector, or repair the damaged harness wire.

STEP 12. Replace the crank angle sensor

  • After replacing the crank angle sensor, reconfirm whether the diagnosis code is set.

Q. Is the diagnosis code set?
Replace the crank angle sensor sensing ring.
Check end.