- Open or short in OCV (for bank 1) circuit
- OCV (for bank 1)
- ECM
| Last Modified: 11-29-2007 | 1.6 C | |
| Service Category: Engine/Hybrid System | Section: Engine Control | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM000000PDW05AX |
| Title: 2UZ-FE ENGINE CONTROL: SFI SYSTEM: DESCRIPTION (2008 Sequoia) | ||
|
DTC |
P0010 |
Camshaft Position "A" Actuator Circuit (Bank 1) |
|
DTC |
P0020 |
Camshaft Position "A" Actuator Circuit (Bank 2) |
DESCRIPTION
- This DTC is designed to detect opens or shorts in the Camshaft Oil Control Valve (OCV) circuit. If the OCV's duty-cycle is excessively high or low while the engine is running, the ECM will illuminate the MIL and store the DTC.
- The VVT (variable valve timing) system adjusts the intake valve timing to improve the driveability. The engine oil pressure turns the camshaft actuator to adjust the valve timing. The OCV is a solenoid valve and switches the engine oil line. The valve moves when the ECM applies the 12 V to the solenoid. The ECM changes the energizing time to the solenoid (duty-cycle) in accordance with the camshaft position, crankshaft position, throttle position, etc.
|
DTC No. |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
P0010 |
Open or short in OCV (for bank 1) circuit (1 trip detection logic) |
|
|
P0020 |
Open or short in OCV (for bank 2) circuit (1 trip detection logic) |
|
HINT:
This DTC relates to the Camshaft Oil Control Valve (OCV).
MONITOR DESCRIPTION
This DTC is designed to detect opens or shorts in the OCV circuit. If the OCV's duty-cycle is excessively high or low while the engine is running, the ECM will illuminate the MIL and store the DTC.
MONITOR STRATEGY
|
Related DTCs |
P0010: VVT OCV range check (bank 1) P0020: VVT OCV range check (bank 2) |
|
Required Sensors/Components (Main) |
VVT OCV |
|
Required Sensors/Components (Related) |
- |
|
Frequency of Operation |
Continuous |
|
Duration |
1 second |
|
MIL Operation |
Immediate |
|
Sequence of Operation |
None |
TYPICAL ENABLING CONDITIONS
|
Monitor runs whenever following DTCs not present |
None |
|
All of following conditions met |
- |
|
Starter |
OFF |
|
Ignition switch |
ON |
|
Time after ignition switch OFF to ON |
0.5 seconds or more |
TYPICAL MALFUNCTION THRESHOLDS
|
One of following conditions met |
- |
|
A. All of following conditions met |
- |
|
Battery voltage |
11 to 13 V |
|
Target duty ratio |
Less than 70% |
|
Output signal duty ratio |
100% |
|
B. All of following conditions met |
- |
|
Battery voltage |
13 V or more |
|
Target duty ratio |
Less than 80% |
|
Output signal duty ratio |
100% |
|
C. Both of following conditions met |
- |
|
Current cut status |
Not cut |
|
Output signal duty ratio |
3% or less |
COMPONENT OPERATING RANGE
|
VVT OCV duty ratio |
3 to 100% |
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
Read freeze frame data using the Techstream. Freeze frame data records the engine condition 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 DTCS |
(a) Clear DTC after recording the freeze frame data and DTC
.
(b) Turn the ignition switch off.
(c) Allow the engine to idle and check DTC.
(d) Check that P0010 or P0020 is not present.
OK:
P0010 or P0020 is not present.
|
|
2. |
INSPECT CAMSHAFT OIL CONTROL VALVE ASSEMBLY |
|
(a) Disconnect the OCV connector. |
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
1 - 2 |
20°C (68°F) |
6.9 to 7.9 Ω |
|
|
3. |
CHECK HARNESS AND CONNECTOR (OCV - ECM) |
|
(a) Disconnect the OCV connector. |
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D26-1 - D56-58 (OC1+) |
Always |
Below 1 Ω |
|
D27-1 - D56-52 (OC2+) |
Always |
Below 1 Ω |
|
D26-2 - D56-57 (OC1-) |
Always |
Below 1 Ω |
|
D27-2 - D56-51 (OC2-) |
Always |
Below 1 Ω |
|
D26-1 or D56-58 (OC1+) - Body ground |
Always |
10 kΩ or higher |
|
D27-1 or D56-52 (OC2+) - Body ground |
Always |
10 kΩ or higher |
|
D26-2 or D56-57 (OC1-) - Body ground |
Always |
10 kΩ or higher |
|
D27-2 or D56-51 (OC2-) - Body ground |
Always |
10 kΩ or higher |
|
|
|