P0016
2ZR-FE ENGINE CONTROL: SFI SYSTEM: P0016,P0017: Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A)
DESCRIPTION
The ECM optimizes the valve timing by using the VVT (Variable Valve Timing) system to control the intake and exhaust camshaft. The VVT system includes the ECM, the camshaft timing oil control valve and the VVT controller (camshaft timing gear assembly). The ECM sends a target duty-cycle control signal to the camshaft timing oil control valve assembly.
This control signal regulates the oil pressure supplied to the VVT controller. The VVT controller can advance or retard the intake and exhaust camshafts.
MONITOR DESCRIPTION
To monitor the correlation of the intake camshaft position and crankshaft position, the ECM checks the VVT learning value while the engine is idling. The VVT learning 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 learning value is out of specified range in consecutive driving cycles, the ECM illuminates the MIL and sets the DTC P0016.
To monitor the correlation of the exhaust camshaft position and crankshaft position, the ECM checks the VVT learning value while the engine is idling. The VVT learning value is calibrated based on the camshaft position and crankshaft position. The exhaust valve timing is set to the most advanced angle while the engine is idling. If the VVT learning value is out of specified range in consecutive driving cycles, the ECM illuminates the MIL and sets the DTC P0017.
This DTC indicates that the intake camshaft has been installed toward the crankshaft at an incorrect angle, caused by factors such as the timing chain having jumped a tooth.
This monitor begins to run after the engine has idled for 5 minutes.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
P0016
P0016:
P0017
P0017:
TYPICAL MALFUNCTION THRESHOLDS
P0016 (Intake Side)
P0016 (Intake Side):
P0017 (Exhaust Side)
P0017 (Exhaust Side):
INSPECTION PROCEDURE
HINT
Read freeze frame data using the Techstream. Freeze frame data records the engine conditions when malfunctions are detected. 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 AND P0017)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
(e) Read the DTCs.
Result:
HINT
If any DTCs other than P0016 or P0017 are output, troubleshoot those DTCs first.
B -- GO TO DTC CHART Engine Control System - SFI System
A -- Continue to next step.
2. PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY)
(a) Connect the Techstream to the DLC3.
(b) Start the engine.
(c) Turn the Techstream on.
(d) Warm up the engine.
(e) Check the camshaft timing oil control valve assembly for intake camshaft.
(1) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT System (Bank 1).
(2) Select the following Data List items: VVT Change Angle (Bank 1) and VVT OCV Duty (Bank 1).
(3) Check that the VVT Change Angle (Bank 1) varies when operating the camshaft timing oil control valve assembly (for intake camshaft) using the Techstream.
OK:
The VVT Change Angle (Bank 1) value and engine speed vary.
(f) Check the camshaft timing oil control valve assembly for exhaust camshaft.
(1) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT Exhaust Linear (Bank 1).
(2) Select the following monitor items: VVT Ex Chg Angle (Bank 1) and VVT Ex OCV Duty (Bank 1).
(3) Check that the VVT Ex Chg Angle (Bank 1) value varies when operating the camshaft timing oil control valve assembly (for exhaust camshaft) using the Techstream.
OK:
The VVT Ex Chg Angle (Bank1) value and engine speed vary.
HINT
If the VVT system can be operated using the Active Test, it can be assumed that the VVT system is operating normally.
NG -- INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE AND/OR EXHAUST CAMSHAFT)
OK -- Continue to next step.
3. ADJUST VALVE TIMING
HINT
There are no marks on the cylinder head to match-up for the purpose of checking valve timing. Valve timing can only be inspected by lining up the colored plates on the timing chain with the marks on the pulleys. It may be necessary to remove and reinstall the chain to match-up the alignment marks Removal.
NEXT -- Continue to next step.
4. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED
(a) In order to clear the ECM's learned values for valve timing, disconnect the cable from the negative (-) battery terminal for 1 minute.
(b) Reconnect the cable to the negative (-) battery terminal.
(c) Connect the Techstream to the DLC 3.
(d) Turn the ignition switch to ON.
(e) Turn the Techstream on.
(f) Clear DTCs DTC Check / Clear.
(g) Start the engine and warm it up.
(h) Allow the engine to idle for 5 minutes or more.
(i) Drive the vehicle with a city drive pattern for more than 10 minutes.
(j) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes / pending.
(k) Read the DTCs.
Result:
B -- REPLACE ECM Removal
A -- END
5. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE AND/OR EXHAUST CAMSHAFT)
HINT
Inspect the specified camshaft timing oil control valve assembly (for intake or exhaust camshaft) in accordance with the inspection result of step 2.
(a) Remove the camshaft timing oil control valve assembly (for intake or exhaust camshaft) Removal.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
(c) Apply battery voltage to terminals of the camshaft timing oil control valve assembly (for intake or exhaust camshaft). Check the valve operation.
OK:
Valve moves quickly.
(d) Reinstall the camshaft timing oil control valve assembly (for intake or exhaust camshaft) Installation.
NG -- REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (INTAKE AND/OR EXHAUST) Removal
OK -- Continue to next step.
6. INSPECT OIL CONTROL VALVE FILTER
(a) Remove the oil control valve filter Disassembly.
(b) Check that the filter is not clogged.
OK:
Filter is not clogged.
(c) Reinstall the oil control valve filter Reassembly.
NG -- REPLACE OIL CONTROL VALVE FILTER
OK -- Continue to next step.
7. REPLACE CAMSHAFT TIMING GEAR ASSEMBLY (INTAKE AND/OR EXHAUST)
HINT
Replace the specified camshaft timing gear (camshaft timing gear for intake camshaft or exhaust camshaft) in accordance with the inspection result of step 2.
(a) Replace the camshaft timing gear assembly (camshaft timing gear for intake camshaft or exhaust camshaft) Removal.
NEXT -- Continue to next step.
8. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED
(a) In order to clear the ECM learned values for valve timing, disconnect the cable from the negative (-) battery terminal for 1 minute.
(b) Reconnect the cable to the negative (-) battery terminal.
(c) Connect the Techstream to the DLC3.
(d) Turn the ignition switch to ON.
(e) Turn the Techstream on.
(f) Clear DTCs DTC Check / Clear.
(g) Start the engine and warm it up.
(h) Allow the engine to idle for 5 minutes or more.
(i) Drive the vehicle with a city drive pattern for more than 10 minutes.
(j) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
(k) Select the following menu items: Powertrain / Engine and ECT / Trouble Codes / Pending.
(l) Read the DTCs.
Result:
B -- REPLACE ECM Removal
A -- END