Lexus NX: Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A) (P0016)

Lexus NX Service Manual / Engine & Hybrid System / 2ar-fxe (engine Control) / Sfi System / Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A) (P0016)

DESCRIPTION

In the VVT (Variable Valve Timing) system, the appropriate intake valve open and close timing is controlled by the ECM. The ECM performs intake valve control by performing the following: 1) controlling the intake camshaft and camshaft timing oil control valve assembly, and operating the camshaft timing gear assembly; and 2) changing the relative positions of the camshaft and crankshaft.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory
P0016	Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A)	Deviation in the crankshaft position sensor signal and camshaft position sensor signal (2 trip detection logic).	Valve timing Camshaft timing oil control valve assembly Oil control valve filter Camshaft timing gear assembly ECM	Comes on	DTC stored

MONITOR DESCRIPTION

To monitor the correlation of the intake camshaft position and crankshaft position, the ECM checks the VVT learned value while the engine is idling. The VVT learned value is calibrated based on the camshaft position and crankshaft position. The intake valve timing is set to the most retarded angle while the engine is idling. If the VVT learned value is out of the specified range in consecutive driving cycles, the ECM illuminates the MIL and stores DTC P0016.

MONITOR STRATEGY

Related DTCs	P0016: Camshaft timing misaligned at idling
Required Sensors/Components (Main)	Camshaft timing gear assembly
Required Sensors/Components (Related)	Camshaft position sensor Crankshaft position sensor
Frequency of Operation	Continuous
Duration	Within 1 minute
MIL Operation	2 driving cycles
Sequence of Operation	None

TYPICAL ENABLING CONDITIONS

Monitor runs whenever the following DTCs are not stored	None
Engine speed	900 to 1100 rpm

TYPICAL MALFUNCTION THRESHOLDS

Either of the following conditions is met	A or B
A. VVT learning value at maximum retarded valve timing (bank 1)	Less than 22°CA (Crankshaft Angle)
B. VVT learning value at maximum retarded valve timing (bank 1)	More than 47°CA (Crankshaft Angle)

CONFIRMATION DRIVING PATTERN

Connect the Techstream to the DLC3.
Turn the power switch on (IG) and turn the Techstream on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the power switch off and wait for at least 30 seconds.
Turn the power switch on (IG) and turn the Techstream on [A].
Put the engine in inspection mode (maintenance mode).
Click here
Start the engine and warm it up until the engine coolant temperature reaches 73°C (163°F) or higher [B].
Idle the engine for 5 minutes or more [C].
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [D].
Read the pending DTCs.
HINT:
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
Input the DTC: P0016.

Check the DTC judgment result.

Techstream Display	Description
NORMAL	DTC judgment completed System normal
ABNORMAL	DTC judgment completed System abnormal
INCOMPLETE	DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions
N/A	Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

HINT:

If the judgment result shows NORMAL, the system is normal.
If the judgment result shows ABNORMAL, the system has a malfunction.
If the judgment result shows INCOMPLETE or N/A, perform steps [E] through [G].

With the engine running, drive the vehicle at 60 km/h (37 mph) for 2 to 3 minutes [E].
CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.

HINT:

If the engine stops, further depress the accelerator pedal to restart the engine.
Idle the engine for 5 minutes or more [F].
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [G].
Read the pending DTCs.
HINT:
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
Check the DTC judgment result.
If the judgment result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs.
Click here
HINT:
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.

CAUTION / NOTICE / HINT

HINT:

The monitor for this DTC detects when the timing chain is shifted by one tooth or more.
Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE

1.	CHECK FOR ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0016)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

(e) Read the DTCs.

Powertrain > Engine and ECT > Trouble Codes

Result	Proceed to
DTC P0016 is output	A
DTC P0016 and other DTCs are output	B

HINT:

If any DTCs other than P0016 are output, troubleshoot those DTCs first.

GO TO DTC CHART

2.	PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE VVT LINEAR)

HINT:

If the VVT system can be operated through the Active Test, it can be assumed that the VVT system is operating normally.

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG) and turn the Techstream on.

Click here

Powertrain > Hybrid Control > Utility

Tester Display
Inspection Mode

(d) Start the engine.

(e) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT Linear (Bank 1) / Gas Valve Control / VVT Change Angle #1.

Powertrain > Engine and ECT > Active Test

Active Test Display
Control the VVT Linear (Bank1)

Data List Display
VVT Change Angle #1

(f) Perform the Active Test. Check that the displacement angle varies.

OK:

Displacement angle varies.

HINT:

Test not possible with the shift lever in P during charge control. Move the shift lever to N to perform test.
If the DTCs are stored after the Active Test, clear the DTCs.

GO TO STEP 4

3.	CHECK ENGINE MECHANICAL SYSTEM

(a) Check for mechanical malfunctions that affect the valve timing, such as a jumped tooth or stretching of the timing chain.

GO TO STEP 7

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

4.	INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY

Click here

REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY

5.	INSPECT OIL CONTROL VALVE FILTER

Click here

REPLACE OIL CONTROL VALVE FILTER

6.	INSPECT CAMSHAFT TIMING GEAR ASSEMBLY

(a) Inspect the camshaft timing gear assembly.

Click here

HINT:

Perform "Inspection After Repair" after replacing the camshaft timing gear assembly.

Click here

REPLACE CAMSHAFT TIMING GEAR ASSEMBLY

7.	CHECK WHETHER DTC OUTPUT RECURS (DTC P0016)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Clear the DTCs.

Click here

Powertrain > Engine and ECT > Clear DTCs

(e) Turn the power switch off and wait for at least 30 seconds.

(f) Turn the power switch on (IG).

(g) Turn the Techstream on.

(h) Put the engine in inspection mode (maintenance mode).

Click here

Powertrain > Hybrid Control > Utility

Tester Display
Inspection Mode

(i) Start the engine and warm it up.

(j) Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.

(k) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending.

(l) Read the pending DTCs.

Powertrain > Engine and ECT > Trouble Codes

Result	Proceed to
DTCs are not output	A
DTC P0016 is output	B

CHECK FOR INTERMITTENT PROBLEMS

REPLACE ECM

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Lexus NX: Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A) (P0016)

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