Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - 1UR-FE ENGINE CONTROL
CHECK FOR ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0014, P0015, P0024 OR P0025)
PERFORM ACTIVE TEST USING GTS (OPERATE CAMSHAFT TIMING OIL CONTROL VALVE)
CHECK WHETHER DTC OUTPUT RECURS (DTC P0014, P0015, P0024 OR P0025)
CHECK VALVE TIMING (CHECK FOR LOOSENESS IN TIMING CHAIN AND WHETHER TIMING CHAIN HAS JUMPED TOOTH)
INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR EXHAUST CAMSHAFT)
INSPECT OIL CONTROL VALVE FILTER
REPLACE CAMSHAFT TIMING EXHAUST GEAR ASSEMBLY
CHECK WHETHER DTC OUTPUT RECURS
DTC P0014 Camshaft Position "B" - Timing Over-Advanced or System Performance (Bank 1)
DTC P0015 Camshaft Position "B" - Timing Over-Retarded (Bank 1)
DTC P0024 Camshaft Position "B" - Timing Over-Advanced or System Performance (Bank 2)
DTC P0025 Camshaft Position "B" - Timing Over-Retarded (Bank 2)
DESCRIPTION
- HINT:
- If DTC P0014, P0015, P0024 or P0025 is output, check the VVT (Variable Valve Timing) system.
The Variable Valve Timing (VVT) system includes the ECM, camshaft timing oil control valve and VVT controller. The ECM sends a target duty cycle control signal to the camshaft timing oil control valve. This control signal regulates the oil pressure supplied to the VVT controller. Camshaft timing control is performed according to engine operating conditions such as the intake air volume, throttle valve position and engine coolant temperature. The ECM controls the camshaft timing oil control valve based on the signals transmitted by several sensors. The VVT controller regulates the exhaust camshaft angle using oil pressure through the camshaft timing oil control valve. As a result, the relative positions of the camshaft and crankshaft are optimized, the engine torque and fuel economy improve, and the exhaust emissions decrease under overall driving conditions. The ECM detects the actual exhaust valve timing using signals from the VVT and crankshaft position sensors and performs feedback control. This is how the target exhaust valve timing is verified by the ECM.
DTC No. | DTC Detection Condition | Trouble Area |
P0014 P0024 | Exhaust valve timing is stuck at a certain value when in the advance range (2 trip detection logic). | Mechanical system (Timing chain has jumped tooth or chain stretched) Camshaft timing oil control valve assembly for exhaust side Oil control valve filter Camshaft timing exhaust gear assembly ECM |
P0015 P0025 | Exhaust valve timing is stuck at a certain value when in the retard range (1 trip detection logic). | Mechanical system (Timing chain has jumped tooth or chain stretched) Camshaft timing oil control valve assembly for exhaust side Oil control valve filter Camshaft timing exhaust gear assembly ECM |
MONITOR DESCRIPTION
If the difference between the target and actual exhaust valve timing is large, and changes in actual exhaust valve timing are small, the ECM interprets this as a VVT controller being stuck and stores a DTC.
CONFIRMATION DRIVING PATTERN
- CAUTION:
- When performing the confirmation driving pattern, obey all speed limits and traffic laws.
- HINT:
GTS 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:
- CAUTION:
- When performing the confirmation driving pattern, obey all speed limits and traffic laws.
- HINT:
- Depress the accelerator pedal by a large amount.
- HINT:
- HINT:
WIRING DIAGRAM
Refer to DTC P0013 ().
INSPECTION PROCEDURE
- HINT:
Abnormal Bank | Timing Over-advanced (Valve Timing Out of Specified Range) | Timing Over-retarded (Valve Timing Out of Specified Range) |
Bank 1 | P0014 | P0015 |
Bank 2 | P0024 | P0025 |
*: The No. 1 cylinder is the cylinder which is farthest from the transmission.
1.CHECK FOR ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0014, P0015, P0024 OR P0025) |
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
Read DTCs.
Result | Proceed to |
P0014, P0015, P0024 or P0025 is output | A |
P0014, P0015, P0024 or P0025 and other DTCs are output | B |
- HINT:
- If any DTCs other than P0014, P0015, P0024 or P0025 are output, troubleshoot those DTCs first.
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A | |
2.PERFORM ACTIVE TEST USING GTS (OPERATE CAMSHAFT TIMING OIL CONTROL VALVE) |
Connect the GTS to the DLC3.
Start the engine.
Turn the GTS on.
Warm up the engine.
Turn the A/C on.
Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT Exhaust Linear (Bank1) or Control the VVT Exhaust Linear (Bank2).
Check the engine speed while operating the camshaft timing oil control valve using the GTS.
- OK:
Tester Operation Specified Condition 0% Normal engine speed 100% Engine idles roughly or stalls
- HINT:
- Refer to "Data List / Active Test" [VVT Ex OCV Duty #1, VVT Ex Chg Angle #1, VVT Ex OCV Duty #2 and VVT Ex Chg Angle #2] ().
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OK | |
3.CHECK WHETHER DTC OUTPUT RECURS (DTC P0014, P0015, P0024 OR P0025) |
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Clear DTCs ().
Warm up the engine.
Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
Read the output pending DTCs using the GTS.
- OK:
- No pending DTC output.
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OK | ||
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4.CHECK VALVE TIMING (CHECK FOR LOOSENESS IN TIMING CHAIN AND WHETHER TIMING CHAIN HAS JUMPED TOOTH) |
Remove the cylinder head cover LH and RH.
Turn the crankshaft pulley and align its groove with the "0" alignment mark of the timing chain cover.
Check that the alignment marks of the camshaft timing gears and camshaft timing exhaust gears are at the positions shown in the illustration.
- HINT:
- If the alignment marks are not as shown, turn the crankshaft one revolution clockwise.
- OK:
- Alignment marks on camshaft timing gears are aligned as shown in the illustration.
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OK | |
5.INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR EXHAUST CAMSHAFT) |
Inspect the camshaft timing oil control valve assembly ().
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OK | |
6.INSPECT OIL CONTROL VALVE FILTER |
Remove the oil control valve filter ().
Check that the filter is not clogged.
- OK:
- Filter is not clogged.
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OK | |
7.REPLACE CAMSHAFT TIMING EXHAUST GEAR ASSEMBLY |
Replace the camshaft timing exhaust gear assembly ().
NEXT | |
8.CHECK WHETHER DTC OUTPUT RECURS |
Perform the Confirmation Driving Pattern.
- OK:
- No pending DTC is output and All Readiness is NORMAL.
- HINT:
- DTC P0014, P0015, P0024 or P0025 is stored when foreign objects in the engine oil are caught in some parts of the system. These codes will remain stored even if the system returns to normal after a short time. These foreign objects are then captured by the oil filter, thus eliminating the source of the problem.
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OK | ||
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