Toyota Tundra. Manual — part 1649

Standard:

MIL goes off

NG: Go to step 3

OK: REPAIR CIRCUITS INDICATED BY OUTPUT DTCS (See DIAGNOSTIC TROUBLE
CODE CHART )

3. CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT IN WIRE HARNESS)

a. Disconnect the A24 ECM connector.

Fig. 339: Identifying A24 ECM Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b. Turn the ignition switch to ON.

c. Check that the MIL is not illuminated.

OK:

MIL is not illuminated.

NG: Go to step 4

OK: REPLACE ECM (See REMOVAL )

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

a. Disconnect the A24 ECM connector.

b. Disconnect the J28 combination meter connector.

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

Saturday, June 19, 2010 7:34:50 PM

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Fig. 340: Identifying A24 ECM And J28 Combination Meter Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

Standard resistance

RESISTANCE SPECIFIED CONDITIONS

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE COMBINATION METER ASSEMBLY (See REMOVAL )

5. CHECK THAT MIL IS ILLUMINATED

a. Check if the MIL is illuminated when the ignition switch is turned to ON.

OK:

MIL should be illuminated.

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 CHART

Tester Connection

Condition Specified Condition

A24-24 (W) or J28-5 (CHK) - Body ground Always

10 kohms or higher

Result

Proceed to

Engine starts

A

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

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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.

Fig. 341: Identifying A24 ECM And J28 Combination Meter Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

Standard resistance

RESISTANCE SPECIFIED CONDITIONS

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE COMBINATION METER ASSEMBLY (See REMOVAL )

CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY

COMPONENTS

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

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

Saturday, June 19, 2010 7:34:50 PM

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Fig. 342: Exploded View Of Camshaft Timing Oil Control Valve Assembly Components With Torque
Specifications
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

ON-VEHICLE INSPECTION

1. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY

a. Connect the Techstream to the DLC3.

b. Start the engine and turn the Techstream on.

c. Warm up the engine.

d. Enter the following menus:

Select: Powertrain/Engine and ECT/Active Test/Control the VVT Linear (Bank 1) or Control the
VVT Linear (Bank 2) or Control the VVT System (Bank 1) or Control the VVT System (Bank 2)
or Control the VVT Exhaust Linear (Bank 1) or Control the VVT Exhaust Linear (Bank 2).

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

OK

ENGINE SPEED CONDITION

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

HINT:



Control the VVT Linear (Bank 1): Command to activate exhaust and intake side oil control
valves of bank 1 (Control range: Between -128 to 127%).



Control the VVT Linear (Bank 2): Command to activate exhaust and intake side oil control
valves of bank 2 (Control range: Between -128 to 127%).



Control VVT System (Bank 1): Command to activate oil control valve of bank 1 (Control
range: ON/OFF).

Techstream Operation

Specified Condition

OCV OFF

Normal engine speed

OCV ON

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

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

Saturday, June 19, 2010 7:34:50 PM

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© 2006 Mitchell Repair Information Company, LLC.