Toyota Tundra (2015 year). Manual — part 1148

Last Modified: 9-16-2014

6.6 C

Doc ID: RM000000XH3104X

Model Year: 2015

Model: Tundra

Prod Date Range: [08/2014 - ]

Title: 1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0300-P0308; Random / Multiple Cylinder Misfire

Detected; 2015 MY Tundra [08/2014 - ]

DTC

P0300

Random / Multiple Cylinder Misfire Detected

DTC

P0301

Cylinder 1 Misfire Detected

DTC

P0302

Cylinder 2 Misfire Detected

DTC

P0303

Cylinder 3 Misfire Detected

DTC

P0304

Cylinder 4 Misfire Detected

DTC

P0305

Cylinder 5 Misfire Detected

DTC

P0306

Cylinder 6 Misfire Detected

DTC

P0307

Cylinder 7 Misfire Detected

DTC

P0308

Cylinder 8 Misfire Detected

DESCRIPTION

increases in the Three-Way Catalytic Converter (TWC) temperature, which may cause damage to the TWC. To

1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0300-P0308;...

misfires, the ECM uses both the Camshaft Position (CMP) sensor and the Crankshaft Position (CKP) sensor. The

CMP sensor is used to identify any misfiring cylinders and the CKP sensor is used to measure variations in the

crankshaft rotation speed. Misfires are counted as when the crankshaft rotation speed variations exceed

predetermined thresholds.

If the misfire rate exceeds the threshold level, the ECM illuminates the MIL and stores a DTC.

DTC

NO.

DTC DETECTION CONDITION

TROUBLE AREA

P0300

High temperature misfire occurs in Three-Way Catalytic

Converter (TWC) (MIL blinks when detect immediately).

Emission deterioration misfire occurs (MIL illuminates).

Open or short in engine

wire harness

Connector connection

Vacuum hose

connections

Ignition system

Injector assembly

Fuel pressure

Mass Air Flow (MAF)

meter

Engine Coolant

Temperature (ECT)

sensor

Compression pressure

Valve timing

PCV valve and hose

PCV hose connections

Air induction system

EGR valve assembly

ECM

P0301

P0302

P0303

P0304

P0305

P0306

P0307

P0308

High temperature misfire occurs in Three-Way Catalytic

Converter (TWC) (MIL blinks when detect immediately).

Emission deterioration misfire occurs (MIL illuminates).

When multiple DTCs for misfiring cylinders are stored, but DTC P0300 is not stored, it indicates that misfires have

been detected in different cylinders at different times. DTC P0300 is only stored when several misfiring cylinders

are detected at the same time.

MONITOR DESCRIPTION

An excessive misfiring rate (approximately 10 to 50 misfires per 1000 crankshaft revolutions) occurs a

the following conditions, which could cause Three-Way Catalytic Converter (TWC) damage, is detected (2 trip

detection logic).

1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0300-P0308;...

HINT:

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

MONITOR STRATEGY

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

Duration

1000 crankshaft revolutions (soon after engine is started: 1 time, other 4

times) (Emissions-related misfire)

200 crankshaft revolutions (1 or 3 times) (Catalyst-damaging misfire)

MIL Operation

2 driving cycles: MIL illuminates when misfire detected

MIL flashes immediately: When catalyst damaged misfire occurs

TYPICAL ENABLING CONDITIONS

Misfire

Monitor runs whenever following DTCs

not present

P0016, P0018 (VVT system - Misalignment)

P0017, P0019 (Exhaust VVT system - Misalignment)

P0101, P0102, P0103 (Mass air flow meter)

P0112, P0113 (Intake air temperature sensor)

P0115, P0117, P0118 (Engine coolant temperature sensor)

P0120, P0121, P0122, P0123, P0220, P0222, P0223, P2135 (Throttle

position sensor)

P0125 (Insufficient Coolant Temperature for Closed Loop Fuel

Control)

P0327, P0328, P032C, P032D, P0332, P0333, P033C, P033D (Knock

Sensor)

P0335 (Crankshaft position sensor)

P0340, P1340 (Camshaft position sensor)

P0351 - P0358 (Igniter)

P0500 (Vehicle speed sensor)

1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0300-P0308;...

Battery voltage

8 V or more

VVT system

Not operated by scan tool

Engine RPM

400 to 5900 rpm

-

(a) ECT at engine start

More than -7°C (19°F)

(b) ECT

More than 20°C (68°F)

Fuel cut

OFF

Crankshaft 1000 revolutions

Except above

Crankshaft 1000 revolutions x 4

Crankshaft 200 revolutions x 3

Except above (MIL blinks immediately)

Crankshaft 200 revolutions

1. Driving cycles

1st

2. Check mode

OFF

3. Engine RPM

Less than 2200 rpm

4. Engine load

Less than 70%

TYPICAL MALFUNCTION THRESHOLDS

1.5% or more

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

MONITOR RESULT

Refer to Checking Monitor Status

.

WIRING DIAGRAM

1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0300-P0308;...