P0016
2GR-FE ENGINE CONTROL: SFI SYSTEM: P0016, P0018: Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A)
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 (for intake camshaft), and operating the camshaft timing gear assembly; and 2) changing the relative positions of the camshaft and crankshaft.
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 (bank 1) or P0018 (bank 2).
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
CONFIRMATION DRIVING PATTERN
1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
4. Turn the engine switch off and wait for at least 30 seconds.
5. Turn the engine switch on (IG) and turn the Techstream on [A].
6. Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher [B].
7. Idle the engine for 5 minutes or more [C].
8. Enter the following menus: Powertrain / Engine / Trouble Codes [D].
9. 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.
10. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
11. Input the DTC: P0016 or P0018.
12. Check the DTC judgment result.
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].
13. Drive the vehicle for 2 to 3 minutes [E].
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
14. Idle the engine for 5 minutes or more [F].
15. Enter the following menus: Powertrain / Engine / Trouble Codes [G].
16. 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.
17. Check the DTC judgment result.
18. If the judgment result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs Reading and Clearing Diagnostic Trouble Codes.
HINT
* If a permanent DTC is output, the system is malfunctioning.
* If no permanent DTC is output, the system is normal.
INSPECTION PROCEDURE
HINT
* Bank 1 refers to the bank that includes the No. 1 cylinder*.
*: The No. 1 cylinder is the cylinder which is farthest from the transaxle.
* Bank 2 refers to the bank that does not include the No. 1 cylinder.
* 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 ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0016 OR P0018)
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Trouble Codes.
(e) Read the DTCs.
Result
HINT
If any DTCs other than P0016 or P0018 are output, troubleshoot those DTCs first.
B -- GO TO DTC CHART SFI System
A -- Continue to next step.
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) Start the engine.
(c) Turn the A/C switch on.
(d) Turn the Techstream on.
(e) Enter the following menus: Powertrain / Engine / Active Test / Control the VVT Linear (Bank 1) or Control the VVT Linear (Bank 2) / Gas Valve Control / VVT Change Angle #1 or VVT Change Angle #2.
(f) Perform the Active Test. Check that the displacement angle varies.
OK:
Displacement angle varies.
NG -- INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE CAMSHAFT)
OK -- Continue to next step.
3. ADJUST VALVE TIMING
(a) Adjust the valve timing Reassembly.
NEXT -- CHECK WHETHER DTC OUTPUT RECURS (DTC P0016 OR P0018)
4. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE CAMSHAFT) P0011
NG -- REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE CAMSHAFT) Removal
OK -- Continue to next step.
5. INSPECT OIL CONTROL VALVE FILTER AND OIL PIPE P0011
NG -- REPLACE OIL CONTROL VALVE FILTER OR OIL PIPE Disassembly
OK -- Continue to next step.
6. INSPECT CAMSHAFT TIMING GEAR ASSEMBLY
(a) Inspect the camshaft timing gear assembly Engine Unit.
HINT
Perform "Inspection After Repair" after replacing the camshaft timing gear assembly Programming and Relearning.
NG -- REPLACE CAMSHAFT TIMING GEAR ASSEMBLY Removal
OK -- Continue to next step.
7. CHECK WHETHER DTC OUTPUT RECURS (DTC P0016 OR P0018)
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.
(e) Turn the engine switch off and wait for at least 30 seconds.
(f) Turn the engine switch on (IG).
(g) Turn the Techstream on.
(h) Start the engine and warm it up.
(i) Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.
(j) Enter the following menus: Powertrain / Engine / Trouble Codes / Pending.
(k) Read the pending DTCs.
Result
B -- REPLACE ECM Removal
A -- END