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 misfire |
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. | Trouble diagnosis name | DTC detecting condition | Possible cause |
P0300 | Multiple cylinder misfire detected | Multiple cylinder misfire. |
|
P0301 | No.1 cylinder misfire detected | No. 1 cylinder misfires. | |
P0302 | No. 2 cylinder misfire detected | No. 2 cylinder misfires. | |
P0303 | No. 3 cylinder misfire detected | No. 3 cylinder misfires. | |
P0304 | No. 4 cylinder misfire detected | No. 4 cylinder misfires. |
*: DTC is detected even where a malfunction occurs one side of the dual injector.
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 PROCEDUREI
Is 1st trip DTC detected?
YES >> Go to EC, "Diagnosis Procedure".
NO >> GO TO 3.
3.PERFORM DTC CONFIRMATION PROCEDUREII
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.
The time to driving varies according to the engine speed in
the freeze frame data.
3. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC, "Diagnosis Procedure".
NO >> INSPECTION END
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?
YES1 >> With CONSULT: GO TO 3.
YES2 >> 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, "Component Function Check".
5.CHECK FUNCTION OF IGNITION COILI
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 COILII
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, "Component Function Check".
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, "Spark Plug".
NO >> Repair or clean spark plug. Then GO TO 8.
8.CHECK FUNCTION OF IGNITION COILIII
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, "Spark Plug".
9.CHECK COMPRESSION PRESSURE
Check compression pressure. Refer to EM, "Inspection".
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, "Removal and Installation".
NO >> Repair or replace.
12.CHECK IGNITION TIMING
Check the following items.
For procedure, refer to EC, "Inspection".
For specification, refer to EC, "Ignition Timing".
Is the inspection result normal?
YES >> GO TO 13.
NO >> Follow the EC, "Work Procedure".
13.CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
5. Check the continuity between A/F
sensor 1 harness connector or ECM harness connector and ground.
6. Also check harness for short to power.
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
Refer to EC, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 15.
NO >> Replace A/F sensor 1. Refer to EM, "Exploded View".
15.CHECK MASS AIR FLOW SENSOR
With CONSULT
0.8 4.0 g/s : at idling
2.0 10.0 g/s : at 2,500 rpm
Check "MASS AIRFLOW" in "DATA MONITOR" mode with CONSULT.
With GST
0.8 4.0 g/s : at idling
2.0 10.0 g/s : at 2,500 rpm
Check mass air flow sensor signal in Service $01 with GST.
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, "DTC Logic".
16.CHECK SYMPTOM TABLE
Check items on the rough idle symptom in EC, "Symptom Table".
Is the inspection result normal?
YES >> GO TO 17.
NO >> Repair or replace.
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.
>> GO TO 18.
18.CHECK INTERMITTENT INCIDENT
Refer to GI, "Intermittent Incident".
>> INSPECTION END
Power outlets
Instrument panel
Console (if so equipped)
The power outlets are for powering electrical
accessories such as cellular telephones. The
outlets are rated at 12 volt, 120W (10A) maximum.
CAUTION
The outlet and plug may be hot during
or immediately after use.
Only certain power outlets ...
Key interlock cable
Exploded View
1. A/T shift selector assembly 2. Key interlock cable A: Key cylinder
B: Lock plate C: Clip
Removal and Installation
CAUTION:
Always apply the parking brake before performing removal and installation.
REMOVAL
Move the shift selector to the "N" position.
Remove the s ...