Toyota Tundra. Manual — part 1278

Fig. 291: Identifying Camshaft Oil Control Valve Replacement Components & Torque Specifications (2
Of 3)

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

Fig. 292: Identifying Camshaft Oil Control Valve Replacement Components & Torque Specifications (3
Of 3)

ON-VEHICLE INSPECTION

1. INSPECT CAMSHAFT OIL CONTROL VALVE

a. Connect the Techstream to the DLC3.

b. Start the engine and turn the Techstream main switch ON.

c. Warm up the engine.

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

d. Enter the following menus: Powertrain/Engine and ECT/Active Test/Control the VVT System

(Bank 1) or Control the VVT System (Bank 2).

e. Check the engine speed while operating the Oil Control Valve (OCV) using the tester.

OK

ACTIVE TEST CHART

If the result is not as specified, check the oil control valve, wirings and camshaft timing gear.

REMOVAL

1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

2. REMOVE NO. 1 ENGINE UNDER COVER (See REMOVAL )

3. DRAIN ENGINE COOLANT . (See REPLACEMENT ).

4. REMOVE FRONT WIPER MOTOR AND LINK ASSEMBLY

a. Remove the front wiper motor and link assembly. (See REMOVAL) .

5. REMOVE FRONT COWL TOP OUTER PANEL SUB-ASSEMBLY . (See REMOVAL ).

6. REMOVE V-BANK COVER . (See INTAKE SYSTEM ).

7. REMOVE NO. 2 AIR CLEANER HOSE . (See REMOVAL ).

8. REMOVE AIR CLEANER ASSEMBLY WITH ELEMENT . (See REMOVAL ).

9. REMOVE THROTTLE BODY WITH MOTOR ASSEMBLY . (See REMOVAL).

10. REMOVE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (for Bank 1)

a. Disconnect the oil control valve connector.

b. Remove the bolt and oil control valve.

c. Remove the O-ring from the oil control valve.

Tester Operation

Specified Condition

OCV OFF

Normal engine speed

OCV ON

Soon after OCV switched from OFF to ON, engine idles roughly or stalls

NOTE:



Some systems need to be initialized after the cable is reconnected
(see INITIALIZATION ).



After the ignition switch is turned OFF, the navigation system
requires approximately 90 seconds to record various types of
memory and settings. As a result, after turning the ignition switch
OFF, wait 90 seconds or more before disconnecting the cable from
the negative (-) battery terminal.

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

Fig. 293: Locating Bolt & Oil Control Valve

11. REMOVE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (for Bank 2)

a. Disconnect the oil control valve connector.

b. Remove the bolt and oil control valve.

c. Remove the O-ring from the oil control valve.

Fig. 294: Locating Bolt & Oil Control Valve

INSPECTION

1. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY

a. Measure the resistance according to the value (s) in the table below.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

If the result is not as specified, replace the oil control valve assembly.

Tester Connection Condition Specified Condition

1 - 2

20°C (68°F)

6.9 to 7.9 ohms

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra