Toyota Tundra. Manual — part 1450

Fig. 285: VC Output - Wiring Diagram

INSPECTION PROCEDURE

1. CHECK MIL

a. Check that the Malfunction Indicator Lamp (MIL) lights up when turning the ignition switch to

ON.

OK: MIL lights up

2008 Toyota Tundra

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

NG : Go to step 2

OK : SYSTEM OK

2. CHECK COMMUNICATION BETWEEN TECHSTREAM AND ECM

a. Connect the Techstream to the DLC3.

b. Turn the ignition switch to ON and Techstream ON.

c. Check the communication between the Techstream and ECM.

Result

RESULT REFERENCE

A : GO TO MIL CIRCUIT

B : Go to Next Step

3. CHECK MIL (THROTTLE POSITION SENSOR)

a. Disconnect the D9 throttle body connector.

b. Turn the ignition switch to ON.

c. Check the MIL.

Result

RESULT REFERENCE

A : REPLACE THROTTLE BODY ASSEMBLY (See REMOVAL )

B : Go to Next Step

4. CHECK MIL (ACCELERATOR PEDAL POSITION SENSOR)

a. Disconnect the A14 accelerator pedal position sensor connector.

b. Turn the ignition switch to ON.

c. Check the MIL.

Result

RESULT REFERENCE

Result

Proceed To

Communication is possible

A

Communication is not possible

B

Result

Proceed To

MIL illuminates

A

MIL does not illuminate

B

2008 Toyota Tundra

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

A : REPLACE ACCELERATOR PEDAL POSITION SENSOR (See REMOVAL )

B : Go to Next Step

5. CHECK MIL (CANISTER PUMP MODULE)

a. Disconnect the R1 canister pump module connector.

b. Turn the ignition switch to ON.

c. Check the MIL.

Result

RESULT REFERENCE

Fig. 286: Identifying R1 Canister Pump Module Connector

A : REPLACE CHARCOAL CANISTER ASSEMBLY . (See CANISTER ).

B : Go to Next Step

6. CHECK MIL (AIR SWITCHING VALVE for Bank 1)

a. Disconnect the D58 air switching valve connector.

b. Turn the ignition switch to ON.

c. Check the MIL.

Result

Proceed To

MIL illuminates

A

MIL does not illuminate

B

Result

Proceed To

MIL illuminates

A

MIL does not illuminate

B

2008 Toyota Tundra

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

Result

RESULT REFERENCE

A : REPLACE AIR SWITCHING VALVE (for Bank 1) . (See AIR SWITCHING VALVE (FOR
BANK 1) ).

B : Go to Next Step

7. CHECK MIL (AIR SWITCHING VALVE for Bank 2)

a. Disconnect the D59 air switching valve connector.

b. Turn the ignition switch to ON.

c. Check the MIL.

Result

RESULT REFERENCE

A : REPLACE AIR SWITCHING VALVE (for Bank 2) . (See AIR SWITCHING VALVE (FOR
BANK 2) ).

B : Go to Next Step

8. CHECK MIL (POWER STEERING OIL PRESSURE SENSOR)

a. Disconnect the D46 power steering oil pressure sensor connector.

b. Turn the ignition switch to ON.

c. Check the MIL.

Result

RESULT REFERENCE

A : REPLACE POWER STEERING OIL PRESSURE SENSOR

B : Go to Next Step

Result

Proceed To

MIL illuminates

A

MIL does not illuminate

B

Result

Proceed To

MIL illuminates

A

MIL does not illuminate

B

Result

Proceed To

MIL illuminates

A

MIL does not illuminate

B

2008 Toyota Tundra

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