Toyota Tundra. Manual — part 1364

Fig. 106: Random / Multiple Cylinder Misfire Detected - Wiring Diagram (1 Of 3)

2008 Toyota Tundra

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

Fig. 107: Random / Multiple Cylinder Misfire Detected - Wiring Diagram (2 Of 3)

2008 Toyota Tundra

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

Fig. 108: Random / Multiple Cylinder Misfire Detected - Wiring Diagram (3 Of 3)

CONFIRMATION DRIVING PATTERN

1. Connect the Techstream to the DLC3.

2. Turn the ignition switch to ON.

3. Turn the Techstream ON.

4. Record the DTC (s) and freeze frame data.

2008 Toyota Tundra

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

5. Using the Techstream, switch the ECM from normal mode to check mode. (See CHECK MODE

PROCEDURE ).

6. Read the misfire counts of each cylinder (cylinder No. 1 to No. 8) with the engine in an idling condition.

If any misfire count is displayed, skip the following confirmation driving pattern.

7. Drive the vehicle several times with the conditions, such as engine RPM and engine load, shown in

Misfire RPM and Misfire Load in the Data List.

HINT:

In order to store misfire DTCs, it is necessary to operate the vehicle for the period of time shown in the
table below, with the MISFIRE RPM (Misfire RPM) and MISFIRE LOAD (Misfire Load) in the Data
List.

ENGINE RPM REFERENCE

8. Check whether misfires have occurred by checking DTCs and freeze frame data.

HINT:

Do not turn the ignition switch off until the stored DTC (s) and freeze frame data have been recorded.
When the ECM returns to normal mode (default), the stored DTC (s), freeze frame data and other data
will be erased.

9. Record the DTC (s), freeze frame data and misfire counts.

10. Turn the ignition switch off and wait for at least 5 seconds.

INSPECTION PROCEDURE

HINT:



If any DTCs other than misfire DTCs are output, troubleshoot those DTCs first.



Read freeze frame data using the Techstream. Freeze frame data records the engine condition when
malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was
moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other
data from the time the malfunction occurred.



If the misfire does not recur when the vehicle is brought to the workshop, reproduce the conditions stored
in the freeze frame data.



If the misfire still cannot be reproduced even though the conditions stored in the freeze frame data have
been duplicated, one of the following factors is considered to be a possible cause of the problem:

a. The fuel level is low.

Engine RPM

Duration

Idling

3.5 minutes or more

1000

3 minutes or more

2000

1.5 minutes or more

3000

1 minute or more

2008 Toyota Tundra

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