Toyota Tundra. Manual — part 1271
![](/vehicles/linovind/mig/whoceedonodb/sjife.png)
2. CHECK COMMUNICATION BETWEEN TECHSTREAM AND ECM
a. Connect the Techstream to the DLC3.
b. Turn the ignition switch ON and Techstream ON.
c. Check the communication between the Techstream and ECM.
Result
RESULT CHART
A : GO TO MIL CIRCUIT
B : Go to next step.
3. CHECK MIL (THROTTLE BODY)
a. Disconnect the throttle body connector.
b. Turn the ignition switch ON.
c. Check the MIL.
Result
RESULT CHART
d. Reconnect the throttle body connector.
A : REPLACE THROTTLE BODY ASSEMBLY (See REMOVAL )
B : Go to next step.
4. CHECK MIL (ACCELERATOR PEDAL POSITION SENSOR)
a. Disconnect the accelerator pedal position sensor connector.
b. Turn the ignition switch ON.
c. Check the MIL.
Result
RESULT CHART
Result
Proceed To
Communication is possible
A
Communication is not possible
B
Result
Proceed To
MIL illuminates
A
MIL does not illuminate
B
Result
Proceed To
2008 Toyota Tundra
2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra
![](/vehicles/linovind/mig/whoceedonodb/gheneded.png)
d. Reconnect the accelerator pedal position sensor connector.
A : REPLACE ACCELERATOR PEDAL ASSEMBLY (See REMOVAL )
B : Go to next step.
5. CHECK MIL (PRESSURE SENSOR [BANK 1])
a. Disconnect the air switching valve (bank 1).
b. Turn the ignition switch ON.
c. Check the MIL
Result
RESULT CHART
d. Reconnect the air switching valve (bank 1).
A : REPLACE AIR SWITCHING VALVE . (See AIR SWITCHING VALVE ).
B : Go to next step.
6. CHECK MIL (PRESSURE SENSOR [BANK 2])
a. Disconnect the air switching valve (bank 2).
b. Turn the ignition switch ON.
c. Check the MIL
Result
RESULT CHART
d. Reconnect the air switching valve (bank 2).
A : REPLACE AIR SWITCHING VALVE . (See AIR SWITCHING VALVE ).
B : Go to next step.
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 (1GR-FE) - Tundra
![](/vehicles/linovind/mig/whoceedonodb/glu.png)
7. CHECK MIL (CANISTER PUMP MODULE)
a. Disconnect the canister pump module connector.
b. Turn the ignition switch ON.
c. Check the MIL.
Result
RESULT CHART
d. Reconnect the canister pump module connector.
A : REPLACE CANISTER ASSEMBLY . (See CANISTER ).
B : Go to next step.
8. PERFORM ACTIVE TEST USING MIL (VVT SENSOR [BANK 1])
a. Disconnect the air cleaner assembly with element.
b. Disconnect the VVT sensor (bank 1) connector.
c. Turn the ignition switch ON.
d. Check the MIL
Result
RESULT CHART
e. Reconnect the VVT sensor (bank 1).
A : REPLACE VVT SENSOR (BANK 1) (See REMOVAL )
B : Go to next step.
9. CHECK MIL (VVT SENSOR [BANK 2])
a. Disconnect the VVT sensor (bank 2) connector.
b. Turn the ignition switch ON.
c. Check the MIL
Result
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 (1GR-FE) - Tundra
![](/vehicles/linovind/mig/whoceedonodb/dyofflo.png)
RESULT CHART
d. Reconnect the VVT sensor (bank 2) connector.
A : REPLACE VVT SENSOR (BANK 2) (See REMOVAL )
B : Go to next step.
10. CHECK HARNESS AND CONNECTOR
a. Disconnect the throttle body connector.
b. Disconnect the accelerator pedal position sensor connector.
c. Disconnect the air switching valve (bank 1).
d. Disconnect the air switching valve (bank 2).
e. Disconnect the canister pump module connector.
f. Disconnect the VVT sensor (bank 1).
g. Disconnect the VVT sensor (bank 2).
h. Disconnect the A24 and D74 ECM connectors.
i. Measure the resistance according to the value (s) in the table below.
Standard resistance (Check for short)
TESTER CONNECTION SPECIFIED CONDITION
j. Reconnect the ECM connectors.
k. Reconnect the canister pump module connector.
l. Reconnect the throttle body connector.
m. Reconnect the accelerator pedal position sensor connector.
Result
Proceed To
MIL illuminates
A
MIL does not illuminate
B
Tester Connection
Condition Specified Condition
A24-57 (VCPA) - Body ground Always
10 kohms or higher
A24-59 (VCP2) - Body ground
Always
10 kohms or higher
D74-80 (VCTA) - Body ground Always
10 kohms or higher
D74-67 (VCV1) - Body ground Always
10 kohms or higher
D74-66 (VCV2) - Body ground Always
10 kohms or higher
2008 Toyota Tundra
2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra
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