Toyota Tundra. Manual — part 1304
a. Preconditions
The monitor will not run unless:
The MIL is OFF.
b. Drive Pattern
1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream ON.
4. Clear DTCs (if set). (See DTC CHECK/CLEAR ).
5. Start the engine and warm it up.
6. Drive the vehicle at between 40 mph and 70 mph (64 km/h and 113 km/h) for at least 10
minutes.
c. Monitor Status
Check the Readiness Monitor status displayed on the Techstream.
If the status does not switch to complete, extend the driving time.
3. EVAP SYSTEM MONITOR (KEY OFF TYPE)
a. Preconditions
The monitor will not run unless:
The fuel tank is less than 90% full.
The altitude is less than 8000 ft. (2438 m).
The vehicle is stationary.
The engine coolant temperature is between 4.4°C and 35°C (40°F and 95°F).
The intake air temperature is between 4.4°C and 35°C (40°F and 95°F).
Vehicle was driven in a city area (or on freeway) for 10 minutes or more.
b. Monitor Conditions
1. Turn the ignition switch off and wait for 6 hours.
HINT:
Do not start the engine until checking Readiness Monitor status. If the engine is started, the
step described above must be repeated.
c. Monitor Status
1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream ON.
2008 Toyota Tundra
2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra
4. Check the Readiness Monitor status displayed on the Techstream.
If the status does not switch to complete, restart the engine, make sure that the preconditions have been
met, and then perform the Monitor Conditions again.
4. AIR-FUEL RATIO (A/F) AND HEATED OXYGEN (HO2) SENSOR MONITORS (ACTIVE AIR-
FUEL RATIO CONTROL TYPE)
Fig. 13: Readiness Monitor Drive Pattern - Air-Fuel Ratio (A/F) & Heated Oxygen (HO2) Sensor
Monitors
a. Preconditions
The monitor will not run unless:
2 minutes or more have elapsed since the engine was started.
The Engine Coolant Temperature (ECT) is 75°C (167°F) or more.
Cumulative driving time at a vehicle speed of 48 km/h (30 mph) or more exceeds 6 minutes.
Air-fuel ratio feedback control is performed.
b. Drive Pattern for front A/F sensor and HO2 sensor
1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream ON.
4. Clear DTCs. (See DTC CHECK/CLEAR ).
2008 Toyota Tundra
2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra
5. Start the engine, and warm it up until the ECT reaches 75°C (167°F) or higher.
6. Drive the vehicle at between 60 km/h (38 mph) and 120 km/h (75 mph) for at least 10
minutes.
7. Change the transmission to 2nd gear.
8. Accelerate the vehicle to 64 km/h (40 mph) or more by depressing the accelerator pedal for at
least 10 seconds.
9. Soon after performing step (8) above, release the accelerator pedal for at least 4 seconds
without depressing the brake pedal in order to execute fuel-cut control.
10. Allow the vehicle to decelerate until the vehicle speed declines to less than 10 km/h (6 mph).
11. Repeat steps from (8) through (10) above at least 3 times in one driving cycle.
c. Monitor Status
1. Check the Readiness Monitor status displayed on the Techstream.
2. If the status does not switch to complete, make sure that the preconditions have been met,
and then perform steps from (5) through (11) in the Drive Pattern above.
5. AIR-FUEL RATIO (A/F) AND HEATED OXYGEN (HO2) SENSOR HEATER MONITORS
(FRONT A/F AND REAR HO2 SENSOR TYPE)
Fig. 14: Readiness Monitor Drive Pattern - Air-Fuel Ratio (A/F) & Heated Oxygen (HO2) Sensor
Heater Monitors
a. Preconditions
The monitor will not run unless:
The MIL is OFF.
b. Drive Pattern
1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream ON.
2008 Toyota Tundra
2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra
4. Clear DTCs (if set). (See DTC CHECK/CLEAR ).
5. Start the engine.
6. Allow the engine to idle for 10 minutes or more.
7. Drive the vehicle at 40 km/h (25 mph) or more for at least 2 minutes.
c. Monitor Status
1. Check the Readiness Monitor status displayed on the Techstream.
If the status does not switch to complete, make sure that the preconditions have been met,
and repeat steps from (5) to (7) described in the Drive Pattern above.
PROBLEM SYMPTOMS TABLE
HINT:
Use the table below to help determine the cause of the problem symptom. The potential causes of the symptoms
are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking
the suspected areas in the order they are listed. Replace parts as necessary.
SFI System
PROBLEM SYMPTOMS - SFI SYSTEM
Symptom
Suspected Area
See
Engine does not crank (Does
not start)
Battery
ON-VEHICLE
INSPECTION
Starter (for 1.4 kW Type)
INSPECTION
Starter (for 2.0 kW Type)
INSPECTION
Starter relay
ON-VEHICLE
INSPECTION
Park/neutral position switch (for 2WD)
INSPECTION
Park/neutral position switch (for 4WD)
INSPECTION
Immobilizer system
SYSTEM DESCRIPTION
No initial combustion (Does not
start)
ECM power source circuit
ECM POWER SOURCE
CIRCUIT
Crankshaft position sensor
CRANKSHAFT POSITION
SENSOR
VVT sensor
VVT SENSOR
Ignition system
ON-VEHICLE
INSPECTION
Fuel pump control circuit
FUEL PUMP CONTROL
CIRCUIT
ECM
TERMINALS OF ECM
VC output circuit
VC OUTPUT CIRCUIT
Fuel pump control circuit
FUEL PUMP CONTROL
2008 Toyota Tundra
2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra
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