Monitor Strategy

Total OBD & ECU Auto Diagnostics

TOAD Auto Diagnostics

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Related DTCs

P0300: Multiple cylinder misfire P0301: Cylinder 1 misfire P0302: Cylinder 2 misfire P0303: Cylinder 3 misfire P0304: Cylinder 4 misfire

Required Sensors/Components (Main)

Injector, Ignition coil, Spark plug

Required Sensors/Components (Related)

Crankshaft, Camshaft, Engine coolant temperature and intake air temperature sensors and Mass air flow meter

Frequency of Operation

Continuous

Duration

1,000 to 4,000 crankshaft revolutions: Emission related misfire 200 to 600 crankshaft revolutions: Catalyst damaged misfire

MIL Operation

2 driving cycles: Emission related misfire

MIL flashes immediately: Catalyst damaged misfire

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

Misfire:

Monitor runs whenever following DTCs not present

Battery voltage

8 V or more

Throttle position learning

Completed

VVT system

Not operated by scan tool

Engine RPM

400 to 5,800 rpm

Both of following conditions A and B met

-

A. Engine coolant Temperature (ECT)

-10°C (14°F) or more

B. Either of following conditions 1 or 2 met

-

1. ECT at engine start

More than -7°C (19°F)

2. ECT

More than 20°C (68°F)

TYPICAL MALFUNCTION THRESHOLDS

Monitor Period of Emission-related-misfire:

Misfire rate

1.538 % or more

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

-

(a) First 1,000 revolutions after engine start or check mode

Crankshaft 1,000 revolutions

(b) Except above

Crankshaft 1,000 revolutions x 4

Monitor Period of Catalyst-damaged-misfire (MIL blinks):

Number of misfire per 200 revolutions

97.14 or more (varies with intake air amount and engine RPM)

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

-

(a) All of following conditions A, B and C met

Crankshaft 200 revolutions x 3

A. Driving cycles

1st

B. Check mode

OFF

C. Engine RPM

Below 2,200 rpm

(b) Except above

Crankshaft 200 revolutions

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