Code No. P0335: Crank Angle Sensor System

OPERATION

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

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 JUDGEMENT

Check Condition

While engine is being cranked.

Judgement Criterion

There is no pulse signal input from the crank angle sensor, and a pulse signal of the camshaft position sensor is detected 30 times or more.

Check Condition

During engine running.

Judgement Criteria

A pulse signal from the crank angle sensor continues 264 times and engine speed is less than 440 r/min.
A crank angle sensor signal pattern is not normal.
Malfunction is detected twice or more since the ignition switch is turned ON.

Check Condition

During engine running.

Judgement Criterion

A crank angle sensor signal pattern is not normal for 2 seconds and engine speed is more than 440 r/min.

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 ).

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 of open circuit, and short circuit in SGT line between crank angle sensor connector and engine-ECU connector.

Q. Is the check result normal?

	Go to Step 4.

	Repair the connector(s) or wiring harness.

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

Data list reference table (Refer to ).

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 of open circuit, and short circuit in 5V line between crank angle sensor connector and engine-ECU connector.

Q. Is the check result normal?

	Go to Step 4.

	Repair the connector(s) or wiring harness.

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

Disconnect connector, and measure at harness side.
Resistance between terminal engine-ECU DGND 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 of open circuit, and damage in DGND line between crank angle sensor connector and engine-ECU connector.

Q. Is the check result normal?

	Go to Step 4.

	Repair the connector(s) or wiring harness.

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>, 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 of damage in 5V line between crank angle sensor connector and engine-ECU connector.

Q. Is the check result normal?

	Go to Step 11.

	Repair the connector(s) or wiring harness.

STEP 11. Check of damage in SGT line between crank angle sensor connector and engine-ECU connector.

Q. Is the check result normal?

	Go to Step 12.

	Repair the connector(s) or wiring harness.

STEP 12. Replace the crank angle sensor

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

Q. Is the diagnosis code stored?

	Replace the crank angle sensor sensing ring.

	Check end.