DTC Description
DTC DETECTION LOGIC
When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the crankshaft position (CKP) sensor (POS) signal to vary, ECM can determine that a misfire is occurring.
Sensor | Input signal to ECM | ECM function |
Crankshaft position sensor (POS) | Engine speed | On board diagnosis of misfir |
The misfire detection logic consists of the following two conditions.
When a misfire condition occurs, the ECM monitors the CKP sensor signal every 200 engine revolutions for a change.
When the misfire condition decreases to a level that will not damage the TWC, the MIL will turn off.
If another misfire condition occurs that can damage the TWC on a second trip, the MIL will blink.
When the misfire condition decreases to a level that will not damage the TWC, the MIL will remain on.
If another misfire condition occurs that can damage the TWC, the MIL will begin to blink again.
A misfire malfunction can be detected on any one cylinder or on multiple cylinders.
DTC No. | CONSULT screen terms (Trouble diagnosis content) | DTC detecting condition |
P0300 | MULTI CYL MISFIRE (Random/multiple cylinder misfire detected) | Multiple cylinder misfire. |
P0301 | CYL 1 MISFIRE (Cylinder 1 Misfire Detected) | No. 1 cylinder misfires |
P0302 | CYL 2 MISFIRE (Cylinder 2 Misfire Detected) | No. 2 cylinder misfires. |
P0303 | CYL 3 MISFIRE (Cylinder 3 Misfire Detected) | No. 3 cylinder misfires. |
P0304 | CYL 4 MISFIRE (Cylinder 4 Misfire Detected) | No. 4 cylinder misfires. |
POSSIBLE CAUSE
FAIL-SAFE
Traveling control mode (Accelerator angle variation control)
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE-1
Is 1st trip DTC detected? YES >> Proceed to EC-288, "Diagnosis Procedure".
NO >> GO TO 3.
3.PERFORM DTC CONFIRMATION PROCEDURE-2
Hold the accelerator pedal as steady as possible.
The similar conditions to (1st trip) Freeze Frame Data means the vehicle operation that the following conditions should be satisfied at the same time.
CAUTION: Always drive vehicle in safe manner according to traffic conditions and obey all traffic laws when driving.
Engine speed | Engine speed in the freeze frame data ± 400 rpm |
Vehicle speed | Vehicle speed in the freeze frame data ± 10 km/h (6 MPH) |
Engine coolant temperature (T) condition | When the freeze frame data shows lower than 70°C (158°F), T should be lower than 70°C (158°F). |
When the freeze frame data shows higher than or equal to 70°C (158°F), T should be higher than or equal to 70°C (158°F). |
The time to driving varies according to the engine speed in the freeze frame data.
Engine speed |
Time |
Around 1,000 rpm | Approximately 10 minutes |
Around 2,000 rpm | Approximately 5 minutes |
More than 3,000 rpm | Approximately 3.5 minutes |
Is 1st trip DTC detected? YES >> Proceed to EC-288, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure
1.CHECK FOR INTAKE AIR LEAK AND PCV HOSE
Is intake air leak detected? YES >> Discover air leak location and repair.
NO >> GO TO 2.
2.CHECK FOR EXHAUST SYSTEM CLOGGING
Stop engine and visually check exhaust tube, three way catalyst and muffler for dents.
Is the inspection result normal? YES-1 >> With CONSULT: GO TO 3.
YES-2 >> Without CONSULT: GO TO 4.
NO >> Repair or replace it.
3.PERFORM POWER BALANCE TEST
With CONSULT
Is the inspection result normal? YES >> GO TO 9.
NO >> GO TO 4.
4.CHECK FUNCTION OF FUEL INJECTOR
Clicking noise should be heard.
Is the inspection result normal? YES >> GO TO 5.
NO >> Perform trouble diagnosis for FUEL INJECTOR. Refer to EC-464, "Diagnosis Procedure".
5.CHECK FUNCTION OF IGNITION COIL-1
CAUTION: Do the following procedure in the place where ventilation is good without the combustible.
NOTE: Do not use CONSULT to release fuel pressure, or fuel pressure applies again during the following procedure.
Spark should be generated.
CAUTION:
NOTE: When the gap is less than 13 mm (0.52 in), the spark might be generated even if the coil is malfunctioning.
Is the inspection result normal? YES >> GO TO 9.
NO >> GO TO 6.
6.CHECK FUNCTION OF IGNITION COIL-2
Spark should be generated.
Is the inspection result normal? YES >> GO TO 7.
NO >> Check ignition coil, power transistor and their circuits. Refer to EC-470, "Diagnosis Procedure".
7.CHECK SPARK PLUG
Check the initial spark plug for fouling, etc.
Is the inspection result normal? YES >> Replace spark plug(s) with standard type one(s). For spark plug type, refer to EM-115, "Spark Plug".
NO >> Repair or clean spark plug. Then GO TO 8.
8.CHECK FUNCTION OF IGNITION COIL-3
1. Reconnect the initial spark plugs.
2. Crank engine for about 3 seconds, and recheck whether spark is generated between the spark plug and the grounded portion.
Spark should be generated.
Is the inspection result normal? YES >> INSPECTION END
NO >> Replace spark plug(s) with standard type one(s). For spark plug type. Refer to EM-115, "Spark Plug".
9.CHECK COMPRESSION PRESSURE
Check compression pressure. Refer to EM-22, "Compression pressure".
Is the inspection result normal? YES >> GO TO 10.
NO >> Check pistons, piston rings, valves, valve seats and cylinder head gaskets.
10.CHECK FUEL PRESSURE
At idling: Approximately 350 kPa (3.57 kg/cm2, 51 psi)
Is the inspection result normal? YES >> GO TO 12.
NO >> GO TO 11.
11.DETECT MALFUNCTIONING PART
Check fuel hoses and fuel tubes for clogging.
Is the inspection result normal? YES >> Replace “fuel filter and fuel pump assembly”. Refer to FL-6, "Removal and Installation".
NO >> Repair or replace.
12.CHECK IGNITION TIMING
Check the following items.
For procedure, refer to EC-132, "Work Procedure".
For specification, refer to EC-500, "Ignition Timing".
Is the inspection result normal? YES >> GO TO 13.
NO >> Follow the EC-132, "Work Procedure".
13.CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT
Is the inspection result normal? YES >> GO TO 14.
NO >> Repair open circuit or short to ground or short to power in harness or connectors.
14.CHECK A/F SENSOR 1 HEATER
Check the A/F sensor 1 heater. Refer to EC-186, "Component Inspection".
Is the inspection result normal? YES >> GO TO 15.
NO >> Replace A/F sensor 1. Refer to EM-29, "Exploded View".
15.CHECK MASS AIR FLOW SENSOR
With CONSULT
*: Check for linear frequency rise in response to engine being increased to about 4,000 rpm.
Without CONSULT
*: Check for linear frequency rise in response to engine being increased to about 4,000 rpm.
Is the measurement value within the specification? YES >> GO TO 16.
NO >> Check connectors for rusted terminals or loose connections in the mass air flow sensor circuit or ground. Refer to EC-202, "DTC Description".
16.CHECK SYMPTOM TABLE
Check items on the rough idle symptom in EC-486, "Symptom Table".
Is the inspection result normal? YES >> GO TO 17.
NO >> Repair or replace error-detected parts.
17.ERASE THE 1ST TRIP DTC
Some tests may cause a 1st trip DTC to be set.
Erase the 1st trip DTC from the ECM memory after performing the tests. Refer to EC-56, "Diagnosis Description".
>> GO TO 18.
18.CHECK INTERMITTENT INCIDENT
Refer to GI-41, "Intermittent Incident".
>> INSPECTION END
P0443 EVAP canister purge volume control solenoid valve
DTC Description
DTC DETECTION LOGIC
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
P0443
PURG VOLUME CONT/V
(Evaporative emission system purge control
valve circuit)
A
The canister purge flow is detected during the vehicle i ...
iPod®* player operation with Navigation System (if so equipped)
iPod®* player operation with Navigation System
Connecting iPod®
WARNINGDo not connect, disconnect, or operate the
USB device while driving. Doing so can be
a distraction. If distracted you could lose
control of your vehicle and cause an accident
or serious injury.
& ...
Power supply and ground circuit
WITH INTELLIGENT KEY SYSTEM
WITH INTELLIGENT KEY SYSTEM : Diagnosis Procedure
Regarding Wiring Diagram information, refer to BCS-50, "Wiring Diagram".
1. CHECK FUSE
Check that the following fuse is not blown.
Terminal No.
Signal name
Fuse No.
161
BCM power sup ...