Code No. P0335: Crank Angle Sensor System

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 JUDGMENT

Check Condition

Battery positive voltage is 6 - 16 V.

Judgment Criterion

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?

	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. Connector check: A-07 crank angle sensor connector

Q. Is the check result normal?

Go to Step 3.

Repair or replace the connector.

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.

OK: 4.9 - 5.1 V

Q. Is the check result normal?

Go to Step 9.

Go to Step 4.

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.

OK: 4.9 - 5.1 V

Q. Is the check result normal?

Go to Step 5.

Go to Step 6.

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

Q. Is the check result normal?

Check output line for open circuit and damage.

Repair or replace the connector.

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

Q. Is the check result normal?

Go to Step 7.

Repair or replace the connector.

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

note

Before checking harness, check intermediate connector A-133, and repair if necessary.

Check output line for short circuit.

Q. Is the check result normal?

Go to Step 8.

Repair the damaged harness wire.

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

Refer to Data List Reference Table

Item 2: Engine revolution

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. When the engine-ECU is replaced, write the chassis number (Refer to GROUP 00 - Precautions Before Service - How to Perform Chassis Number Writing

). After replacing the engine-ECU, register the injector identification code and learn fuel injection (Refer to GROUP 00 - Precautions Before Service - What The Common Rail Engine Learns

). After registering the injector identification code, the vehicle equipped with the DPF carries out the forcible DPF regeneration. (Refer to GROUP 17 - Emission Control - Diesel Particulate Filter (DPF) System - Forcible DPF Regeneration

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.

OK: 4.9 - 5.1 V

Q. Is the check result normal?

Go to Step 11.

Go to Step 10.

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.

Repair or replace the connector.

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.

OK: Continuity (2 Ω or less)

Q. Is the check result normal?

Go to Step 14.

Go to Step 12.

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

Q. Is the check result normal?

Go to Step 13.

Repair or replace the connector.

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

note

Before checking harness, check intermediate connector A-133, and repair if necessary.

Check earthing line for open circuit and damage.

Q. Is the check result normal?

Go to Step 8.

Repair the damaged harness wire.

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.

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 valve should be 0.6 V or less with no noise in waveform.

Q. Is the check result normal?

Go to Step 8.

Go to Step 15.

STEP 15. Check the crankshaft sensing blade.

Q. Is the check result normal?

	Go to Step 16.

	Replace the crankshaft sensing blade

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

Refer to Data List Reference Table

Item 2: Engine revolution

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 crank angle sensor