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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 DGND.
  • 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.
or
  • Engine speed is more than 500 r/min excluding during cranking.
Judgment Criterion
  • Crankshaft position sensor output voltage does not change (no pulse signal is input) for 2 seconds.
 
 
DTC SET CONDITIONS <Range/Performance problem - alignment>
Logic Flow Chart
Check Condition
  • Engine is being cranked.
or
  • Engine speed is more than 500 r/min excluding during cranking.
Judgment Criterion
  • Normal signal pattern is not inputted for cylinder identification from the crankshaft position sensor signal and camshaft position sensor signal for 2 seconds.
 
 
FAIL-SAFE AND BACKUP FUNCTION
  • None
 
 
OBD-II DRIVE CYCLE PATTERN
  • Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 22 .
 
 
TROUBLESHOOTING HINTS (The most likely causes for this code to be stored are:)
  • Crankshaft position sensor failed.
  • Open or shorted crankshaft position sensor circuit, 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
STEP 1. Using scan tool (M.U.T.-III), check data list item 2: Crankshaft Position Sensor.
cautionTo 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.
(1) Disconnect the crankshaft position sensor connector and connect the test harness special tool MB991709 between the separated connectors. (All terminals should be connected.)
(2) Connect the oscilloscope probe to terminal SGT line of the crankshaft position sensor connector.
noteWhen checking with the ECM side connector, connect the oscilloscope probe to the ECM connector terminal SGT by backprobing.
(3) Start the engine and run at idle.
(4) Check the wave pattern.
  • The wave pattern should show a pattern similar to the illustration.
(5) Turn the ignition switch to the "LOCK" (OFF) position.
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 5V 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 backprobing.
(1) Do not disconnect the connector.
(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 by backprobing.
  • 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 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 5V 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? present?
Go to Step 8.
Go to Step 7.
 
STEP 7. Check of open circuit and short circuit to ground 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 DGND 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 DGND 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 crankshaft position sensor connector and ECM connector.
Is the harness wire in good condition?
Replace the crankshaft position sensor. Then go to Step 12.
Repair the connector(s) or wiring harness. Then go to Step 14.
 
STEP 12. Check the trouble symptoms.
(1) Carry out a test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 22 .
(2) Check the diagnostic trouble code (DTC).
Is DTC P0335 stored?
Replace the crankshaft sensing ring. Then go to Step 14.
The inspection is complete.
 
STEP 13. Using scan tool (M.U.T.-III), check data list item 2: Crankshaft Position Sensor.
(1) Start the engine and run at idle.
(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 22 .
(2) Check the diagnostic trouble code (DTC).
Is DTC P0335 stored?
Retry the troubleshooting.
The inspection is complete.