DTC P0017: Crankshaft/camshaft (exhaust) Position Sensor Phase Problem

TECHNICAL DESCRIPTION

The ECM checks the variable valve timing system for malfunction.

DESCRIPTIONS OF MONITOR METHODS

MONITOR EXECUTION

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)

Camshaft position sensor
Crankshaft position sensor
Engine coolant temperature sensor
Throttle position sensor
Engine oil control valve

DTC SET CONDITIONS

Logic Flow Chart

Check Conditions

Engine speed is between 594 r/min and 1,500 r/min.
Engine coolant temperature is between 20°C (68°F) and 88°C (190°F).
Exhaust engine oil control valve is "OFF".
1 second has elapsed after the above mentions have been met.

Judgment Criterion

The close timing of the exhaust valve is faster than -15 degrees (ATDC) <Except for California> or -12 degrees (ATDC) <California> for 10 seconds.

The close timing of the exhaust valve is slower than 15 degrees (ATDC) <Except for California> or 18 degrees (ATDC) <California> for 10 seconds.

OBD-II DRIVE CYCLE PATTERN

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

Timing chain in out of place.
Loose timing chain.
Exhaust variable valve timing sprocket tooth coming off.
ECM failed.

DIAGNOSIS

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

STEP 1. Using the oscilloscope, measure output wave pattern at crankshaft position sensor and exhaust camshaft position sensor.

(1)Disconnect the crankshaft position sensor connector B-105 and connect the test harness special tool (MB991709) between the separated connectors.

(2)Connect the oscilloscope probe to the crankshaft position sensor side connector terminal No. 3.
(3)Disconnect the exhaust camshaft position sensor connector B-107, and connect test harness special tool (MB991709) between the separated connectors.

(4)Connect the oscilloscope probe to the exhaust camshaft position sensor side connector terminal No. 3.

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 (crankshaft position sensor) and terminal No. 7 (exhaust camshaft position sensor).

(5)Start the engine and run at idle.

(6)Check the waveform.

The waveform should show a pattern similar to the illustration.

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

Q. Is the waveform normal?

Go to Step 2.

Go to Step 3.

STEP 2. Check the trouble symptoms.

(1)Carry out a test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 20

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

Q. Is DTC P0017 set?

	Replace the ECM. When the ECM is replaced, register the ID code. Refer to GROUP 42B, Diagnosis - ID Code Registration Judgment Table <Vehicles with KOS> or GROUP 42C, Diagnosis - ID Codes Registration Judgment Table <Vehicles with WCM> . Then go to Step 4.

	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 .

STEP 3. Check timing mark on the timing chain.

Q. Is timing chain in out of place?

	Repair it. Then go to Step 4.

	Check the following items, and repair or replace the defective items. Check the timing chain loose. Check the exhaust variable valve timing sprocket tooth coming off. Then go to Step 4.

STEP 4. 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 20

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

Q. Is DTC P0017 set?

	Retry the troubleshooting.

	The inspection is complete.