Posted in MMC L200

P0335 – Crank Angle Sensor System MMC L200 IV

 Posted by  Posted on September 28, 2020

OPERATION

  • A power voltage of 5 V is applied to the crank angle sensor power terminal (terminal No. 3) from the engine-ECU (terminal No. 68) and earthed to engine-ECU (terminal No. 91) from the crank angle sensor (terminal No. 1).
  • The sensor signal is inputted to the engine-ECU (terminal No. 67) from the crank angle sensor output terminal (terminal No. 2).

    • FUNCTION

  • The crank angle sensor detects the crank angle (position) and inputs a pulse signal to the engine-ECU.
  • In response to the signal, the engine ECU detects the engine speed, controls the fuel injection timing and fuel injection quantity, etc.

    • TROUBLE JUDGEMENT

  • Battery positive voltage is 6 – 16 V.
  • The number of output pulses from the crank angle sensor per engine rotation is one or less.

    • PROBABLE CAUSES

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

    • DIAGNOSIS PROCEDURE

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

  • Refer to Data List Reference Table
  • Item 2: Engine revolution

    • Q. Is the check result normal?

    STEP 2. Connector check: A-07 crank angle sensor connector

    Q. Is the check result normal?

    STEP 3. Perform voltage measurement at A-07 crank angle sensor connector.

  • Use special tool test harness (MB991709) to connect connector, and measure at pick-up harness.
  • Ignition switch: ON
  • Voltage between terminal No. 2 and earth.

    • Q. Is the check result normal?

    STEP 4. Perform voltage measurement at C-105 engine-ECU connector.

  • Measure engine-ECU terminal voltage.
  • Disconnect A-07 crank angle sensor connector.
  • Ignition switch: ON
  • Voltage between terminal No. 67 and earth.

    • Q. Is the check result normal?

    STEP 5. Connector check: C-105 engine-ECU connector

    Q. Is the check result normal?

  • Check output line for open circuit and damage.

    • STEP 6. Connector check: C-105 engine-ECU connector

    Q. Is the check result normal?

    STEP 7. Check harness between A-07 (terminal No. 2) crank angle sensor connector and C-105 (terminal No. 67) engine-ECU connector.

  • Check output line for short circuit.

    • Q. Is the check result normal?

    STEP 8. M.U.T.-III data list

  • Refer to Data List Reference Table
  • Item 2: Engine revolution

    • Q. Is the check result normal?

    STEP 9. Perform voltage measurement at A-07 crank angle sensor connector.

  • Use special tool test harness (MB991709) to connect connector, and measure at pick-up harness.
  • Ignition switch: ON
  • Voltage between terminal No. 3 and earth.

    • Q. Is the check result normal?

    STEP 10. Connector check: C-105 engine-ECU connector

    Q. Is the check result normal?

  • Check power supply line for open/short circuit and damage.

    • STEP 11. Perform resistance measurement at A-07 crank angle sensor connector.

  • Disconnect connector, and measure at harness side.
  • Resistance between terminal No. 1 and earth.

    • Q. Is the check result normal?

    STEP 12. Connector check: C-105 engine-ECU connector

    Q. Is the check result normal?

    STEP 13. Check harness between A-07 (terminal No. 1) crank angle sensor connector and C-105 (terminal No. 91) engine-ECU connector.

  • Check earthing line for open circuit and damage.

    • Q. Is the check result normal?

    STEP 14. Perform output wave pattern measurement at A-07 crank angle sensor (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 <A/T>
  • Voltage between terminal No. 2 and earth.

    • Q. Is the check result normal?

    STEP 15. Check the crankshaft sensing blade.

    Q. Is the check result normal?

    STEP 16. M.U.T-III data list

  • Refer to Data List Reference Table
  • Item 2: Engine revolution

    • Q. Is the check result normal?

    Author: admin