Toyota Tundra. Manual — part 1154
2. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY
a. Disconnect the D42 or D43 OCV connector.
b. Measure the resistance according to the value(s) in the table below.
Standard resistance
TESTER CONNECTION SPECIFIED CONDITION
NG : REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (See REMOVAL )
Fig. 36: Identifying Oil Control Valve Connector Terminals
OK : Go to next step
3. CHECK HARNESS AND CONNECTOR (OCV - ECM)
a. Disconnect the D42 or D43 OCV connector.
b. Disconnect the D74 ECM connector.
c. Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for open)
TESTER CONNECTION SPECIFIED CONDITION
Tester Connection Condition Specified Condition
1 - 2
20°C (68°F)
6.9 to 7.9 ohms
Tester Connection
Condition Specified Condition
D42-1 - D74-58 (OC1+) Always
Below 1 ohms
D43-1 - D74-52 (OC2+) Always
Below 1 ohms
D42-2 - D74-57 (OC1-)
Always
Below 1 ohms
D43-2 - D74-51 (OC2-)
Always
Below 1 ohms
2008 Toyota Tundra
2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra
Standard resistance (Check for short)
TESTER CONNECTION SPECIFIED CONDITION
NG : REPAIR OR REPLACE HARNESS OR CONNECTOR
Fig. 37: Identifying D42 Or D43 OCV Connector Terminals
OK : REPLACE ECM (See REMOVAL )
DTC P0011 CAMSHAFT POSITION "A" - TIMING OVER-ADVANCED OR SYSTEM
PERFORMANCE (BANK 1); DTC P0012 CAMSHAFT POSITION "A" - TIMING OVER-RETARDED
(BANK 1); DTC P0021 CAMSHAFT POSITION "A" - TIMING OVER-ADVANCED OR SYSTEM
PERFORMANCE (BANK 2); DTC P0022 CAMSHAFT POSITION "A" - TIMING OVER-RETARDED
(BANK 2)
Tester Connection
Condition Specified Condition
D42-1 or D74-58 (OC1+) - Body ground Always
10 kohms or higher
D43-1 or D74-52 (OC2+) - Body ground Always
10 kohms or higher
D42-2 or D74-57 (OC1-) - Body ground
Always
10 kohms or higher
D43-2 or D74-51 (OC2-) - Body ground
Always
10 kohms or higher
2008 Toyota Tundra
2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra
DESCRIPTION
Refer to DTC P0010 .
DTC TROUBLE DETECTION CONDITION CHART
MONITOR DESCRIPTION
The ECM optimizes the intake valve timing using the VVT (Variable Valve Timing) system to control the
intake camshaft. The VVT system includes the ECM, the Oil Control Valve (OCV) and the VVT controller.
The ECM sends a target duty-cycle control signal to the OCV. This control signal regulates the oil pressure
supplied to the VVT controller. The VVT controller can advance or retard the intake camshaft. if the difference
between the target and actual intake valve timings is large, and changes in the actual intake valve timing are
small, the ECM interprets this as the VVT controller stuck malfunction and sets a DTC.
Example:
A DTC is set when the following conditions 1, 2 and 3 are met:
1. The difference between the target and actual intake valve timing is more than 5°CA (Crankshaft Angle)
and the condition continues for more than 4.5 seconds.
2. It takes 5 seconds or more to change the valve timing by 5°CA.
3. After above conditions 1 and 2 are met, the OCV is forcibly activated 63 times or more.
DTC P0011 and P0021 (Advanced Cam Timing) are subject to 1 trip detection logic.
DTC P0012 and P0022 (Retarded Cam Timing) are subject to 2 trip detection logic.
These DTCs indicate that the VVT controller cannot operate properly due to OCV malfunctions or the presence
of foreign objects in the OCV.
The monitor will run if all of the following conditions are met:
The engine is warm (the engine coolant temperature is 75°C [167°F] or more).
The vehicle has been driven at more than 40 mph (64 km/h) for 3 minutes.
The engine has idled for 3 minutes.
DTC
No.
DTC Detection Condition
Trouble Area
P0011
P0021
Valve timing is not adjusted in valve timing advance range (1
trip detection logic)
Valve timing
Oil control valve (OCV)
OCV filter
Camshaft timing gear
assembly
ECM
P0012
P0022
Valve timing is not adjusted in valve timing retard range (2 trip
detection logic)
2008 Toyota Tundra
2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra
MONITOR STRATEGY
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
TYPICAL MALFUNCTION THRESHOLDS
If the difference between the target and actual camshaft timings is greater than the specified value, the ECM
operates the VVT actuator.
Then, the ECM monitors the camshaft timing change for 5 seconds.
WIRING DIAGRAM
Related DTCs
P0011: Advanced camshaft timing (bank 1)
P0012: Retarded camshaft timing (bank 1)
P0021: Advanced camshaft timing (bank 2)
P0022: Retarded camshaft timing (bank 2)
Required Sensors/Components
(Main)
VVT OCV and VVT Actuator
Required Sensors/Components
(Related)
Crankshaft position sensor, VVT sensor and Engine coolant
temperature sensor
Frequency of Operation
Once per driving cycle
Duration
Within 10 seconds
MIL Operation
Advanced camshaft timing: Immediate
Retarded camshaft timing: 2 driving cycles
Sequence of Operation
None
Monitor runs whenever following DTCs not present
P0102 - P0103 (MAF meter)
P0115-P0118 (ECT sensor)
P0125 (Insufficient ECT for closed loop)
P0335 (CKP sensor)
P0340 (VVT sensor)
P0351 - P0356 (Igniter)
Battery voltage
11 V or more
Engine RPM
500 to 4000 RPM
ECT
75 to 100°C (167 to 212°F)
All of following conditions are met
-
Deactivation of actual valve timing and target valve
timing
More than 5°CA (crankshaft angle)
Valve timing
No change at advanced (retarded) valve
timing
2008 Toyota Tundra
2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra
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