Toyota Tundra. Manual - part 1551

If a catalyst damage misfire occurs, the ECM informs the driver by flashing the MIL.

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

Misfire:

TYPICAL ENABLING CONDITIONS - MISFIRE

Related DTCs

P0300: Multiple cylinder misfire
P0301: Cylinder 1 misfire
P0302: Cylinder 2 misfire
P0303: Cylinder 3 misfire
P0304: Cylinder 4 misfire
P0305: Cylinder 5 misfire
P0306: Cylinder 6 misfire
P0307: Cylinder 7 misfire
P0308: Cylinder 8 misfire

Required Sensors/Components
(Main)

Crankshaft position sensor and Camshaft position sensor

Required Sensors/Components
(Related)

Engine coolant temperature and intake air temperature sensors and
Mass air flow meter

Frequency of Operation

Continuous

Duration

1000 to 4000 crankshaft revolutions: Emission related misfire
200 to 600 crankshaft revolutions: Catalyst damaged misfire

MIL Operation

2 driving cycles: MIL illuminates when misfire detect
MIL flashes immediately: When catalyst damaged misfire occur

Sequence of Operation

None

Monitor runs whenever following
DTCs not present

P0016, P0018 (VVT System - Misalignment)
P0017, P0019 (Exhaust VVT System - Misalignment)
P0102, P0103 (Mass Air Flow Sensor)
P0112, P0113 (Intake Air Temperature Sensor)
P0115, P0117, P0118 (Engine Coolant Temperature Sensor)
P0125 (Insufficient Coolant Temperature for Closed Loop Fuel
Control)
P0120, P0121, P0122, P0123, P0220, P0222, P0223, P2135
(Throttle Position Sensor)
P0327, P0328, P0332, P0333, P032C, P032D, P033C, P033D
(Knock Sensor)
P0335 (Crankshaft Position Sensor)
P1340 (Camshaft Position Sensor)
P0351 - P0358 (Igniter)
P0500 (Vehicle Speed Sensor)
P0705 (Shift Lever Position Switch)

2009 Toyota Tundra

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

Monitor period of emission-related-misfire:

TYPICAL ENABLING CONDITIONS - MONITOR PERIOD OF EMISSION-RELATED-MISFIRE

Monitor period of catalyst-damaged-misfire (MIL blinks):

TYPICAL ENABLING CONDITIONS - MONITOR PERIOD OF CATALYST-DAMAGED-MISFIRE

TYPICAL MALFUNCTION THRESHOLDS

Monitor period of emission-related-misfire:

TYPICAL MALFUNCTION THRESHOLDS - MONITOR PERIOD OF EMISSION-RELATED-
MISFIRE

Monitor period of catalyst-damaged-misfire (MIL blinks):

TYPICAL MALFUNCTION THRESHOLDS - MONITOR PERIOD OF CATALYST-DAMAGED-
MISFIRE

MONITOR RESULT

Refer to CHECKING MONITOR STATUS .

WIRING DIAGRAM

Battery voltage

8 V or more

VVT system

Not operated by scan tool

Engine speed

400 to 5900 RPM

Either of following conditions (a) or (b)
met

(a) ECT at engine start

More than -7°C (19°F)

(b) ECT

More than 20°C (68°F)

Fuel cut

OFF

First 1000 revolutions after engine start, or Check Mode

Crankshaft 1000 revolutions

Except above

Crankshaft 1000 revolutions x 4

All of following conditions 1, 2 and 3 met

Crankshaft 200 revolutions x 3

1. Driving cycles

1st

2. Check mode

OFF

3. Engine speed

Less than 2800 RPM

Except above

Crankshaft 200 revolutions

Misfire rate

2.5% or more

Number of misfire per 200 revolutions

103 or more (varies with intake air amount and RPM)

2009 Toyota Tundra

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

Fig. 120: Injector - Wiring Diagram (1 Of 3)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig. 121: Injector - Wiring Diagram (2 Of 3)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig. 122: Injector - Wiring Diagram (3 Of 3)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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.

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

2009 Toyota Tundra

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

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 speed 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 and Misfire Load in the Data List.

DATA LIST 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.



FFVs update the alcohol concentration learned value (Alcohol Density Estimate) when the vehicle is
refueled. As idling stability may decrease when fuels having different properties are used, check with the
customer about the fuels recently used in the vehicle.



Make sure to compare the value of "Alcohol Density Estimate" in the freeze frame data with the current
"Alcohol Density Estimate" value in the Data List.



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.

Engine Speed

Duration

Idling

3.5 minutes or more

1000

3 minutes or more

2000

1.5 minutes or more

3000

1 minute or more

2009 Toyota Tundra

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

Content .. 1549 1550 1551 1552 ..