Hint
:
When coolant temp in the freeze frame data is less than 80°c (176°f), there is a possibility of misfire only during engine warm up.
1 Check other dtc output(in addition to misfire dtcs)
Result:
Hint
: if any other codes besides p0300, p0301, p0302, p0303 or p0304 are output, perform the troubleshooting for those dtcs first.
2 Check wire harness, connector and vacuum hose in engine room
3 Check connection of pcv hose
4 Read value of hand–held tester or obd ii scan tool(number of misfire)
Hint
: when a misfire is not reproduced, be sure to branch below based on the stored dtc. Result:
5 Check spark plug and spark of misfiring cylinder
Recommended spark plug:
Electrode gap: 1.0 To 1.3 Mm (0.039 To 0.051 In.) Notice
: if adjusting the gap of a new spark plug, bend only the base of the ground electrode. Do not touch the tip. Never attempt to adjust the gap on a used plug.
Caution
: absolutely disconnect the each injector connectors.
Notice
: do not crank the engine for more than 5 seconds at a time.
Standard: spark jumps across electrode gap.
6 Change normal spark plug and check spark of misfiring cylinder
Caution
: absolutely disconnect each injector connector.
Notice
: do not crank the engine for more than 5 seconds at a time.
Standard: spark jumps across electrode gap.
7 Check harness and connector of misfiring cylinder(ignition coil – ecm)
Standard (check for open):
Standard (check for short):
Standard (check for open):
Standard (check for short):
Repair or replace harness or connector
8 Inspect ecm terminal of misfiring cylinder(#10, #20, #30 or #40 voltage)
Standard:
9 Inspect fuel injector resistance of misfiring cylinder
10 Check harness and connector of misfiring cylinder(injector – ecm, injector – ignition switch)
Standard (check for open):
Standard (check for short):
Standard (check for open):
Standard (check for short):
11 Inspect fuel injector injection and volume of misfiring cylinder
12 Check cylinder compression pressure of misfiring cylinder
13 Check valve clearance of misfiring cylinder
14 Switch step by number of misfire cylinder(refer result of step 4)
Hint
:
15 Check valve timing(check for looseness or a jumped tooth of the timing chain)
16 Check fuel pressure
17 Read value of hand–held tester or obd ii scan tool(intake air temperature and mass air flow rate)
Temperature: equivalent to ambient temperature
Standard:
18 Inspect engine coolant temperature sensor(resistance)
Standard:
Notice
: if you checking the engine coolant temperature sensor in water, be careful not to allow water to go into the terminals.
After checking, dry the sensor.
Hint
: alternate procedure: connect an ohmmeter to the installed engine coolant temperature sensor and read the resistance. Use an infrared thermometer to measure the engine temperature in the immediate vicinity of the sensor. Compare these values to the resistance/temperature graph. Change the engine temperature (warm up or allow to cool down) and repeat the test.
19 Switch step by number of misfire cylinder(refer result of step 4)
Hint
:
Check for intermittent problems
Overhaul
Hint: components:
1. Remove front wheel
2. Disconnect front stabilizer link assy lh
Remove the nut and disconnect the front stabilizer link
assy lh from the shock absorber assy front lh.
Hint:
if the ball joint turns together with the nut, use a hexagon (6 mm)
wrench to hold the st ...
Overhaul
1. Drain clutch fluid
2. Disconnect clutch release cylinder to flexible hose tube
Using sst, disconnect the flexible hose tube.
Sst 09023–00100
Hint:
use a container to catch the fluid.
3. Remove clutch release cylinder assy
Remove the 3 bolts, clutch release cylinder assy an ...
Positioning a floor jack
When using a floor jack, follow the instructions in the manual provided with
the jack and perform the operation safely.
When raising your vehicle with a floor jack, position the jack correctly.
Improper placement may damage your vehicle or cause injury.
◆ Front
◆ Rear
1 Take out ...