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DTC P0335: Crankshaft
Position Sensor Circuit
CIRCUIT OPERATION
- The crankshaft position sensor power is supplied from
the ECM (terminal No. 9).
- Terminal No. 2 of the crankshaft position sensor is grounded with ECM (terminal
No. 24).
- A 5-volt voltage is applied on the crankshaft position sensor output terminal (terminal
No. 3) from the ECM (terminal No. 8). 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
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)
Other Monitor (There is no temporary DTC stored in memory
for the item monitored below)
Sensor (The sensor below is determined to be normal)
DTC SET CONDITIONS <Circuit continuity>
Logic Flow Chart
Check Condition
or
- Engine speed is more than 500 r/min excluding during cranking.
Judgement 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
or
- Engine speed is more than 500 r/min excluding during cranking.
Judgement 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
OBD-II DRIVE CYCLE PATTERN
Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern
23 
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TROUBLESHOOTING HINTS (The most likely causes for this code to be set 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.
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Required Special Tools:
- MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: V.C.I.
- MB991827: USB Cable
- MB991910: Main Harness A
- MB991709: Test Harness
- MB992110: Power Plant ECU Check Harness
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STEP 1. Using scan tool MB991958, check data list item
2: Crankshaft Position Sensor.
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| caution |
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK"
(OFF) position before connecting or disconnecting scan tool MB991958.
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(1)Connect scan tool MB991958 to the data link connector.
(2)Start the engine and run at idle.
(3)Set scan tool MB991958 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.
Q.
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.
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STEP 2. Using the oscilloscope, check the crankshaft position sensor.
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(1)Disconnect the crankshaft position sensor connector B-105 and connect the test
harness special tool (MB991709) between the separated connectors (All terminals should be connected).
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(2)Connect the oscilloscope probe to terminal No. 3 of the crankshaft position sensor connector.
| note |
When measuring with the ECM side connector, disconnect all ECM connectors. Connect the
check harness special tool (MB992110) between the separated connectors. Then connect the oscilloscope
probe to the check harness connector terminal No. 8.
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(3)Start the engine and run at idle.
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(4)Check the waveform.
- The waveform should show a pattern similar to the illustration.
(5)Turn the ignition switch to the "LOCK" (OFF) position.
Q.
Is the waveform normal?
Go to Step 3.
Go to Step 5.
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STEP 3. Check harness connector B-105 at crankshaft position sensor
and harness connector B-108 at ECM for damage.
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Q.
Are the harness connectors in good condition?
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Go to Step 4.
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Repair or replace them. Refer to GROUP 00E, Harness Connector Inspection .
Then go to Step 20.
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STEP 4. Using scan tool MB991958, check data list item 2: Crankshaft
Position Sensor.
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(1)Start the engine and run at idle.
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(2)Set scan tool MB991958 to the data reading mode for item 2, Crankshaft Position
Sensor.
- The tachometer and engine speed indicated on the scan tool should match.
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(3)Turn the ignition switch to the "LOCK" (OFF) position.
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Q.
Is the sensor operating properly?
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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 .
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Replace the ECM. When the ECM is replaced, register the ID code. Refer to GROUP
42B, Diagnosis - ID Code Registration Necessity Judgment Table <Vehicles with KOS> or
GROUP 42C, Diagnosis - ID Codes Registration Judgment Table <Vehicles with WCM> .
Then go to Step 20.
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STEP 5. Check harness connector B-105 at crankshaft position sensor
for damage.
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Q.
Is the harness connector in good condition?
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Go to Step 6.
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Repair or replace it. Refer to GROUP 00E, Harness Connector Inspection .
Then go to Step 20.
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STEP 6. Measure the sensor supply voltage at crankshaft position sensor
harness side connector B-105.
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(1)Disconnect the connector B-105 and measure at the harness side.
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(2)Turn the ignition switch to the "ON" position.
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(3)Measure the voltage between terminal No. 3 and ground.
- Voltage should be between 4.9 and 5.1 volts.
(4)Turn the ignition switch to the "LOCK" (OFF) position.
Q.
Is the measured voltage between 4.9 and 5.1 volts?
Go to Step 10.
Go to Step 7.
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STEP 7. Check harness connector B-108 at ECM for damage.
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Q.
Is the harness connector in good condition?
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Go to Step 8.
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Repair or replace it. Refer to GROUP 00E, Harness Connector Inspection .
Then go to Step 20.
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STEP 8. Measure the sensor supply voltage at ECM connector B-108 by
using power plant ECU check harness special tool MB992110.
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(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 B-105.
(3)Turn the ignition switch to the "ON" position.
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(4)Measure the voltage between terminal No. 8 and ground.
- Voltage should be between 4.9 and 5.1 volts.
(5)Turn the ignition switch to the "LOCK" (OFF) position.
Q.
Is the measured voltage between 4.9 and 5.1 volts?
Repair harness wire between crankshaft position sensor connector B-105 (terminal
No. 3) and ECM connector B-108 (terminal No. 8) because of open circuit. Then go to Step 20.
Go to Step 9.
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STEP 9. Check for short circuit to ground between crankshaft position
sensor connector B-105 (terminal No. 3) and ECM connector B-108 (terminal No. 8).
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Q.
Is the harness wire in good condition?
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Replace the ECM. When the ECM is replaced, register the ID code. Refer to GROUP
42B, Diagnosis - ID Code Registration Necessity Judgment Table <Vehicles with KOS> or
GROUP 42C, Diagnosis - ID Codes Registration Judgment Table <Vehicles with WCM> .
Then go to Step 20.
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Repair it. Then go to Step 20.
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STEP 10. Measure the sensor supply voltage at crankshaft position
sensor harness side connector B-105.
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(1)Disconnect the connector B-105 and measure at the harness side.
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(2)Turn the ignition switch to the "ON" position.
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(3)Measure the voltage between terminal No. 1 and ground.
- Voltage should be between 4.9 and 5.1 volts.
(4)Turn the ignition switch to the "LOCK" (OFF) position.
Q.
Is the measured voltage between 4.9 and 5.1 volts?
Go to Step 13.
Go to Step 11.
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STEP 11. Check harness connector B-108 at ECM for damage.
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Q.
Is the harness connector in good condition?
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Go to Step 12.
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Repair or replace it. Refer to GROUP 00E, Harness Connector Inspection .
Then go to Step 20.
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STEP 12. Check for open circuit and short circuit to ground between
crankshaft position sensor connector B-105 (terminal No. 1) and ECM connector B-108 (terminal No.
9).
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Q.
Is the harness wire in good condition?
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Replace the ECM. When the ECM is replaced, register the ID code. Refer to GROUP
42B, Diagnosis - ID Code Registration Necessity Judgment Table <Vehicles with KOS> or
GROUP 42C, Diagnosis - ID Codes Registration Judgment Table <Vehicles with WCM> .
Then go to Step 20.
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Repair it. Then go to Step 20.
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STEP 13. Check the continuity at crankshaft position sensor harness
side connector B-105.
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(1)Disconnect the connector B-105 and measure at the harness side.
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(2)Check for the continuity between terminal No. 2 and ground.
- Continuity (2 ohms or less)
Q.
Does continuity exist?
Go to Step 16.
Go to Step 14.
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STEP 14. Check harness connector B-108 at ECM for damage.
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Q.
Is the harness connector in good condition?
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Go to Step 15.
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Repair or replace it. Refer to GROUP 00E, Harness Connector Inspection .
Then go to Step 20.
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STEP 15. Check for open circuit and harness damage between crankshaft
position sensor connector B-105 (terminal No. 2) and ECM connector B-108 (terminal No. 24).
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Q.
Is the harness wire in good condition?
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Replace the ECM. When the ECM is replaced, register the ID code. Refer to GROUP
42B, Diagnosis - ID Code Registration Necessity Judgment Table <Vehicles with KOS> or
GROUP 42C, Diagnosis - ID Codes Registration Judgment Table <Vehicles with WCM> .
Then go to Step 20.
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Repair it. Then go to Step 20.
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STEP 16. Check harness connector B-108 at ECM for damage.
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Q.
Is the harness connector in good condition?
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Go to Step 17.
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Repair or replace it. Refer to GROUP 00E, Harness Connector Inspection .
Then go to Step 20.
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STEP 17. Check for harness damage between ECM connector B-108 (terminal
No. 9) and crankshaft position sensor connector B-105 (terminal No. 1).
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Q.
Is the harness wire in good condition?
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Go to Step 18.
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Repair it. Then go to Step 20.
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STEP 18. Check for harness damage between crankshaft position sensor
connector B-105 (terminal No. 3) and ECM connector B-108 (terminal No. 8).
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Q.
Is the harness wire in good condition?
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Go to Step 19.
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Repair it. Then go to Step 20.
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STEP 19. Check the crankshaft position sensing ring.
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Q.
Is the crankshaft position sensing ring in good condition?
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Replace the crankshaft position sensor. Then go to Step 20.
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Replace the crankshaft sensing ring. Then go to Step 20.
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STEP 20. Test the OBD-II drive cycle.
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(1)Carry out a test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II
Drive Cycle - Pattern 23 .
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(2)Check the diagnostic trouble code (DTC).
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Retry the troubleshooting.
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The inspection is complete.
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