13A-DTC P0335: Crankshaft Position Sensor Circuit

DTC P0335: Crankshaft Position Sensor Circuit

CIRCUIT OPERATION

The crankshaft position sensor power is supplied from the ECM terminal 5V.
Ground terminal of the crankshaft position sensor is grounded with ECM terminal SGTE.
A 5-volt voltage is applied on the crankshaft position sensor output terminal from the ECM terminal SGT. The crankshaft position sensor generates a pulse signal when the output terminal is opened and grounded.

TECHNICAL DESCRIPTION

The crankshaft position sensor detects the crank angle (position) of each cylinder, and converts that data to pulse signals, then which are input to the ECM.
When the engine is running, the crankshaft position sensor outputs a pulse signal.
The ECM checks whether pulse signal is input while the engine is cranking.

DESCRIPTIONS OF MONITOR METHODS

Crankshaft position sensor signal does not change.
Crankshaft position sensor signal is not normal pattern.

MONITOR EXECUTION

Continuous

MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)

Other Monitor (There is no temporary DTC stored in memory for the item monitored below)

Not applicable

Sensor (The sensor below is determined to be normal)

Not applicable

DTC SET CONDITIONS <Circuit continuity>

Logic Flow Chart

Check Condition

Engine is being cranked.

Engine speed is higher than 500 r/min excluding during cranking.

Judgment Criterion

Crankshaft position sensor output voltage has not changed (no pulse signal is input) for 2 seconds.

DTC SET CONDITIONS <Range/Performance problem - alignment>

Logic Flow Chart

Check Condition

Engine is being cranked.

Engine speed is higher than 500 r/min excluding during cranking.

Judgment Criterion

Normal signal pattern has not been input for cylinder identification from the crankshaft position sensor signal and camshaft position sensor signal for 2 seconds.

FAIL-SAFE AND BACKUP FUNCTION

Engine stops.

OBD-II DRIVE CYCLE PATTERN

Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 23 .

TROUBLESHOOTING HINTS (The most likely causes for this code to be stored are: )

Crankshaft position sensor failed.
Open or shorted crankshaft position sensor circuit, or harness damage, or connector damage.
Crankshaft position sensing ring failed
ECM failed.

DIAGNOSIS

Required Special Tools:

MB992744: Vehicle Communication Interface-Lite (V.C.I.-Lite)
MB992745: V.C.I.-Lite Main Harness A
MB992747: V.C.I.-Lite USB Cable Short
MB992748: V.C.I.-Lite USB Cable Long
MB991958: Scan Tool (M.U.T.-III Sub Assembly)

MB991824: Vehicles Communication Interface (V.C.I.)
MB991827: M.U.T.-III USB Cable
MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)

MB991709: Test Harness
MB992110: Power Plant ECU Check Harness

STEP 1. Using scan tool (M.U.T.-III), check data list item 2: Crankshaft Position Sensor.

caution

To prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III).

(1) Connect scan tool (M.U.T.-III). Refer to HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)

(2) Start the engine and run at idle.

(3) Set scan tool (M.U.T.-III) to the data reading mode for item 2, Crankshaft Position Sensor.

The tachometer and engine speed indicated on the scan tool should match.

(4) Turn the ignition switch to the "LOCK" (OFF) position.

Is the sensor operating properly?

It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions

Go to Step 2.

STEP 2. Using the oscilloscope, check the crankshaft position sensor.

Engine: Idling
Transmission: P range
Voltage between terminal SGT and ground.

OK: Waveforms should be displayed on inspection procedure using an oscilloscope (Refer to

Is the wave pattern normal?

Go to Step 13.

Go to Step 3.

STEP 3. Measure the sensor supply voltage at crankshaft position sensor harness side connector.

(1) Disconnect the crankshaft position sensor connector and measure at the harness side.

(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal SGT line and ground.

Voltage should be between 4.9 and 5.1 volts.

(4) Turn the ignition switch to the "LOCK" (OFF) position.

Is the measured voltage between 4.9 and 5.1 volts?

Go to Step 6.

Go to Step 4.

STEP 4. Measure the sensor supply voltage at ECM connector by using power plant ECU check harness special tool MB992110.

(1) Disconnect all ECM connectors. Connect the power plant ECU check harness special tool MB992110 between the separated connectors.

(2) Disconnect the crankshaft position sensor connector.

(3) Turn the ignition switch to the "ON" position.

(4) Measure the voltage between terminal SGT and ground.

Voltage should be between 4.9 and 5.1 volts.

(5) Turn the ignition switch to the "LOCK" (OFF) position.

Is the measured voltage between 4.9 and 5.1 volts?

Repair or replace the connector(s), or check and repair the harness of open circuit in SGT line between crankshaft position sensor connector and ECM connector. Then go to Step 14.

Go to Step 5.

STEP 5. Check of short circuit to ground in SGT line between crankshaft position sensor connector and ECM connector.

Is the harness wire in good condition?

Go to Step 13.

Repair the connector(s) or wiring harness. Then go to Step 14.

STEP 6. Measure the power supply voltage at crankshaft position sensor harness side connector.

(1) Disconnect the crankshaft position sensor connector and measure at the harness side.

(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal 5V line and ground.

Voltage should be battery positive voltage.

(4) Turn the ignition switch to the "LOCK" (OFF) position.

Is battery positive voltage (approximately 12 volts) present?

Go to Step 8.

Go to Step 7.

STEP 7. Check of short to ground and open circuit in 5V line between crankshaft position sensor connector and ECM connector.

Is the harness wire in good condition?

Go to Step 13.

Repair the connector(s) or wiring harness. Then go to Step 14.

STEP 8. Check the continuity at crankshaft position sensor harness side connector.

(1) Disconnect the crankshaft position sensor connector and measure at the harness side.

(2) Check for the continuity between terminal SGTE line and ground.

Continuity (2 ohms or less)

Does continuity exist?

Go to Step 10.

Go to Step 9.

STEP 9. Check of open circuit and harness damage in SGTE line between crankshaft position sensor connector and ECM connector.

Is the harness wire in good condition?

Go to Step 13.

Repair the connector(s) or wiring harness. Then go to Step 14.

STEP 10. Check of harness damage in 5V line between ECM connector and crankshaft position sensor connector.

Is the harness wire in good condition?

Go to Step 11.

Repair the connector(s) or wiring harness. Then go to Step 14.

STEP 11. Check of harness damage in SGT line between ECM connector and crankshaft position sensor connector.

Is the harness wire in good condition?

Go to Step 12.

Repair the connector(s) or wiring harness. Then go to Step 14.

STEP 12. Check the crankshaft position sensing ring.

Is the crankshaft position sensing ring in good condition?

Replace the crankshaft position sensor. Then go to Step 13.

Replace the crankshaft sensing ring. Then go to Step 13.

STEP 13. Using scan tool (M.U.T.-III), check data list item 2: Crankshaft Position Sensor.

(1) Turn the ignition switch to the "ON" position.

(2) Set scan tool (M.U.T.-III) to the data reading mode for item 2, Crankshaft Position Sensor.

The tachometer and engine speed indicated on the scan tool should match.

(3) Turn the ignition switch to the "LOCK" (OFF) position.

Is the sensor operating properly?

It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions

Replace the ECM (Refer to Removal and Installation

). Then go to Step 14.

STEP 14. Test the OBD-II drive cycle.

(1) Carry out a test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 23

(2) Check the diagnostic trouble code (DTC).

Is DTC P0335 stored?

Retry the troubleshooting.

The inspection is complete.