Toyota Tundra. Manual — part 1460

NG : Go to step 6

OK : SYSTEM OK

6. CHECK THAT ENGINE STARTS

a. Turn the ignition switch to ON.

b. Start the engine.

Result

RESULT REFERENCE

B : GO TO VC OUTPUT CIRCUIT

A : Go to Next Step

7. CHECK HARNESS AND CONNECTOR (COMBINATION METER - ECM)

a. Disconnect the A24 ECM connector.

b. Disconnect the J28 combination meter connector.

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

Standard resistance

STANDARD RESISTANCE SPECIFICATION

Result

Proceed To

Engine starts

A

Engine does not start*

B

HINT:
*: The Techstream cannot communicate with the ECM.

Tester Connection

Condition Specified Condition

A24-24 (W) - J28-5 (CHK) Always

Below 1 ohms

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra

Fig. 318: Identifying A24 ECM & J28 Combination Meter Connectors

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR

OK : REPLACE COMBINATION METER ASSEMBLY . (See COMBINATION METER ).

CAMSHAFT OIL CONTROL VALVE

COMPONENTS

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra

Fig. 319: Identifying Camshaft Oil Control Valve Replacement Components With Torque Specifications

ON-VEHICLE INSPECTION

1. INSPECT CAMSHAFT OIL CONTROL VALVE

a. Connect the Techstream to the DLC3.

b. Start the engine and turn the tester ON.

c. Warm up the engine.

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

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra

(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

OIL CONTROL VALVE ON AND OFF POSITION

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 THROTTLE BODY COVER SUB-ASSEMBLY (See REMOVAL )

3. REMOVE AIR CLEANER HOSE ASSEMBLY (See REMOVAL )

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

a. Disconnect the oil control valve connector.

b. Remove the bolt and camshaft timing oil control valve.

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

Fig. 320: Locating Oil Control Valve Connector

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

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 (2UZ-FE) - Tundra