Part 2
2GR-FXE ENGINE CONTROL: SFI SYSTEM: P0300-P0306: Random / Multiple Cylinder Misfire Detected
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
(Continued)
16. READ VALUE USING TECHSTREAM (COOLANT TEMP)
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine and ECT / Data List / Coolant Temp.
(e) Read the Coolant Temp twice, when the engine is both cold and warmed up.
Standard:
With cold engine
Same as ambient temperature.
With warm engine
Between 75°C and 95°C (167°F and 203°F).
NG -- REPLACE ENGINE COOLANT TEMPERATURE SENSOR Removal
OK -- Continue to next step.
17. INSPECT MASS AIR FLOW METER SUB-ASSEMBLY
HINT
Inspect the mass air flow meter sub-assembly On-Vehicle Inspection.
NG -- REPLACE MASS AIR FLOW METER SUB-ASSEMBLY Removal
OK -- Continue to next step.
18. CHECK VALVE TIMING
HINT
Check the valve timing P0011.
NG -- ADJUST VALVE TIMING
OK -- Continue to next step.
19. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE EGR STEP POSITION)
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Put the engine in inspection mode Component Tests and General Diagnostics.
(e) Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or more.
HINT
The A/C switch and all accessory switches should be off.
(f) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step Position.
(g) Confirm the Throttle Idle Position is ON and check the engine idling condition and MAP values in the Data List while performing the Active Test.
HINT
- Do not leave the EGR valve open for 10 seconds or more during the Active Test.
- Be sure to return the EGR valve to step 0 when Active Test is completed.
OK:
MAP and idling condition change in response to EGR step position as follows.
Standard:
HINT
During Active Test, if the idling condition does not change in response to EGR step position, then there is probably a malfunction in EGR valve.
Result:
B -- REPLACE ECM
A -- Continue to next step.
20. INSPECT EGR VALVE ASSEMBLY
(a) Remove the EGR valve assembly Removal.
(b) Check if the EGR valve is stuck open.
OK:
EGR valve is tightly closed.
(c) Reinstall the EGR valve assembly Installation.
NG -- REPLACE EGR VALVE ASSEMBLY Removal
OK -- Continue to next step.
21. REPLACE ECM
(a) Replace the ECM Removal.
NEXT -- Continue to next step.
22. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Clear the DTC DTC Check / Clear.
(e) Turn the power switch off.
(f) Turn the power switch on (IG) and turn the Techstream on.
(g) Put the engine in inspection mode Component Tests and General Diagnostics.
(h) Start the engine and warm it up.
(i) Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.
(j) Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
(k) Input the DTC: P0300, P0301, P0302, P0303, P0304, P0305 or P0306.
(l) Check the DTC judgment result.
NEXT -- END
23. CHECK INTAKE SYSTEM
(a) Check the intake system for vacuum leaks Testing and Inspection.
OK:
No leaks in intake system.
NG -- REPAIR OR REPLACE INTAKE SYSTEM
OK -- Continue to next step.
24. CHECK FUEL PRESSURE
(a) Check the fuel pressure Testing and Inspection.
NG -- CHECK FUEL LINE
OK -- Continue to next step.
25. READ VALUE USING TECHSTREAM (COOLANT TEMP)
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine and ECT / Data List / Coolant Temp.
(e) Read the Coolant Temp twice, when the engine is both cold and warmed up.
Standard:
With cold engine
Same as ambient air temperature.
With warm engine
Between 75°C and 95°C (167°F and 203°F).
NG -- REPLACE ENGINE COOLANT TEMPERATURE SENSOR Removal
OK -- Continue to next step.
26. INSPECT MASS AIR FLOW METER SUB-ASSEMBLY
HINT
Inspect the mass air flow meter sub-assembly On-Vehicle Inspection.
NG -- REPLACE MASS AIR FLOW METER SUB-ASSEMBLY Removal
OK -- Continue to next step.
27. CHECK VALVE TIMING
HINT
Check the valve timing P0011.
NG -- ADJUST VALVE TIMING
OK -- Continue to next step.
28. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE EGR STEP POSITION)
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Put the engine in inspection mode Component Tests and General Diagnostics.
(e) Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or more.
HINT
The A/C switch and all accessory switches should be off.
(f) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step Position.
(g) Confirm the Throttle Idle Position is ON and check the engine idling condition and MAP values in the Data List while performing the Active Test.
HINT
- Do not leave the EGR valve open for 10 seconds or more during the Active Test.
- Be sure to return the EGR valve to step 0 when Active Test is completed.
OK:
MAP and idling condition change in response to EGR step position as follows.
Standard:
HINT
During Active Test, if the idling condition does not change in response to EGR step position, then there is probably a malfunction in EGR valve.
Result:
B -- CHECK SPARK PLUG
A -- Continue to next step.
29. INSPECT EGR VALVE ASSEMBLY
(a) Remove the EGR valve assembly Removal.
(b) Check if the EGR valve is stuck open.
OK:
EGR valve is tightly closed.
(c) Reinstall the EGR valve assembly Installation.
NG -- REPLACE EGR VALVE ASSEMBLY Removal
OK -- Continue to next step.
30. CHECK SPARK PLUG
(a) Remove the ignition coil assembly and the spark plug of the misfiring cylinder.
(b) Measure the spark plug electrode gap.
Maximum gap:
1.4 mm (0.0551 in.)
(c) Check the electrode for carbon deposits.
Recommended Spark Plug
NOTICE:
If the electrode gap is larger than the maximum, replace the spark plug. Do not adjust the electrode gap.
(d) Reinstall the ignition coil assembly and the spark plug.
NG -- REPLACE SPARK PLUG Removal
OK -- Continue to next step.
31. CHECK FOR SPARK AND IGNITION (SPARK TEST)
(a) Perform a spark test Testing and Inspection.
CAUTION:
During the test, disconnect all fuel injector assembly connectors.
NOTICE:
Do not crank the engine for more than 2 seconds.
OK:
Spark jumps across electrode gap.
NG -- CHANGE TO KNOWN GOOD SPARK PLUG AND CHECK SPARK OF MISFIRING CYLINDER
OK -- Continue to next step.
32. CHECK CYLINDER COMPRESSION PRESSURE OF MISFIRING CYLINDER
(a) Measure the cylinder compression pressure of the misfiring cylinder Engine.
NG -- CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION
OK -- Continue to next step.
33. CHECK FUEL INJECTOR ASSEMBLY (POWER SOURCE)
(a) Disconnect the fuel injector assembly connectors.
(b) Turn the power switch on (IG).
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Text in Illustration
(d) Reconnect the fuel injector assembly connectors.
NG -- CHECK FUEL INJECTOR CIRCUIT
OK -- Continue to next step.
34. CHECK HARNESS AND CONNECTOR (FUEL INJECTOR ASSEMBLY - ECM)
(a) Disconnect the fuel injector assembly connectors.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Open):
Standard Resistance (Check for Short):
Text in Illustration
(d) Reconnect the fuel injector assembly connectors.
(e) Reconnect the ECM connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (FUEL INJECTOR ASSEMBLY - ECM)
OK -- Continue to next step.
35. INSPECT ECM TERMINAL OF MISFIRING CYLINDER (#10, #20, #30, #40, #50 AND/OR #60 VOLTAGE)
(a) Disconnect the ECM connector.
(b) Turn the power switch on (IG).
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Text in Illustration
(d) Reconnect the ECM connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - BODY GROUND)
OK -- Continue to next step.
36. CHECK FUEL INJECTOR ASSEMBLY OF MISFIRING CYLINDER
(a) Check the fuel injector assembly injection (whether fuel volume is high or low, and whether injection pattern is poor) Testing and Inspection.
NG -- REPLACE FUEL INJECTOR ASSEMBLY Removal
OK -- Continue to next step.
37. REPLACE ECM
(a) Replace the ECM Removal.
NEXT -- Continue to next step.
38. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Clear the DTC DTC Check / Clear.
(e) Turn the power switch off.
(f) Turn the power switch on (IG) and turn the Techstream on.
(g) Put the engine in inspection mode Component Tests and General Diagnostics.
(h) Start the engine and warm it up.
(i) Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.
(j) Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
(k) Input the DTC: P0300, P0301, P0302, P0303, P0304, P0305 or P0306.
(l) Check the DTC judgment result.
NEXT -- END
39. CHANGE TO KNOWN GOOD SPARK PLUG AND CHECK SPARK OF MISFIRING CYLINDER
(a) Change the installed spark plug to a known good spark plug.
(b) Perform a spark test Testing and Inspection.
CAUTION:
During the test, disconnect all fuel injector assembly connectors.
NOTICE:
Do not crank the engine for more than 2 seconds.
OK:
Spark jumps across electrode gap.
NG -- CHANGE TO KNOWN GOOD IGNITION COIL ASSEMBLY AND CHECK SPARK OF MISFIRING CYLINDER
OK -- REPLACE SPARK PLUG Removal
40. CHANGE TO KNOWN GOOD IGNITION COIL ASSEMBLY AND CHECK SPARK OF MISFIRING CYLINDER
(a) Change the installed ignition coil assembly to a known good ignition coil assembly.
(b) Perform a spark test Testing and Inspection.
CAUTION:
During the test, disconnect all fuel injector assembly connectors.
NOTICE:
Do not crank the engine for more than 2 seconds.
OK:
Spark jumps across electrode gap.
NG -- REPLACE ECM Removal
OK -- REPLACE IGNITION COIL ASSEMBLY Removal
41. CHECK FUEL LINE
(a) Check the fuel lines for leaks or blockage.
NG -- REPAIR OR REPLACE FUEL LINE
OK -- REPLACE FUEL PUMP Removal