Code No. P0335: Crank Angle Sensor System

OPERATION

Power is supplied to the crank angle sensor connector terminal from the engine control relay connector terminal 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, 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 ).

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 power supply line and body earth.

OK: System voltage

Q. Is the check result normal?

	Go to Step 6.

	Repair or replace the connector(s), or check and repair the harness of open circuit, and short circuit in power supply line between crank angle sensor connector and engine control relay connector.

STEP 6. 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 8.

	Go to Step 7.

STEP 7. 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 8. 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
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 9.

STEP 9. Check of damage in power supply line between crank angle sensor connector and engine control relay connector.

Q. Is the check result normal?

	Go to Step 10.

	Repair the connector(s) or wiring harness.

STEP 10. Check of damage in SGT 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 the crankshaft sensing blade.

Q. Is the check result normal?

	Go to Step 12.

	Replace the crankshaft sensing blade.

STEP 12. M.U.T.-II/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 crank angle sensor.