Part 2
2AZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1603,P1605: Engine Stall History
P1605 - Rough Idling (Continued)
23. INSPECT FUEL PUMP
(a) Inspect the fuel pump Fuel Pump.
NG -- REPLACE FUEL PUMP Removal (to 10/2010)
OK -- CHECK FUEL PUMP CONTROL CIRCUIT Fuel Pump Control Circuit
24. CHECK FUEL SYSTEM
(a) Check for foreign matter such as iron particles around the fuel pump (fuel pump, fuel pump filter and inside the fuel tank), and for signs that the fuel pump was stuck.
Result
HINT
If there is foreign matter such as iron particles on the fuel pump, fuel filter or fuel tank, remove the foreign matter.
B -- REPLACE MALFUNCTIONING PARTS
A -- REPAIR OR REPLACE FUEL SYSTEM Components
25. READ FREEZE FRAME DATA
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored Freeze Frame Data.
Result
HINT
- Try to operate the vehicle under the conditions recorded in the freeze frame data which were present when the malfunction occurred. Confirm the data at this time and the data when the engine is idling (engine warmed up, no load, and shift lever in D or N) and compare these data with the freeze frame data.
- *1: If the mass air flow meter is malfunctioning and incorrectly measures the intake air volume to be higher than the actual volume of air flowing through the intake manifold, the freeze frame data will show a high engine load value.
- *2: As the air fuel ratio sensor output is low before the sensor warms up, the value at that time cannot be used for diagnosis. If the air fuel ratio sensor is malfunctioning and constantly outputs a value indicating the air-fuel ratio is rich, the actual air-fuel ratio will become lean and the engine may stall.
C -- READ FREEZE FRAME DATA
B -- PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE INJECTION VOLUME)
A -- Continue to next step.
26. INSPECT MASS AIR FLOW METER
(a) Remove the mass air flow meter.
(b) Check for foreign matter in the air flow passage of the mass air flow meter.
Result
HINT
Even if the results are normal, the mass air flow meter may have been malfunctioning. Continue this inspection procedure until step 34, and if there are no problems with other parts, replace the mass air flow meter (refer to step 57).
B -- READ FREEZE FRAME DATA
A -- REPLACE MASS AIR FLOW METER Removal
27. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE INJECTION VOLUME)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Start the engine, turn off all accessory switches and warm up the engine until the engine coolant temperature stabilizes.
(d) Idle the engine.
(e) Using the Techstream, select the [Control the Injection Volume] Active Test.
(f) Read the output voltage from the air fuel ratio sensor when increasing and decreasing the fuel injection volume.
Standard:
Result
HINT
- The air fuel ratio sensor has an output delay of a few seconds and the heated oxygen sensor has a maximum output delay of approximately 20 seconds.
- Even if the results are normal, the air fuel ratio sensor may have been malfunctioning. Continue this inspection procedure until step 34, and if there are no problems with other parts, replace the air fuel ratio sensor (refer to step 57).
B -- READ FREEZE FRAME DATA
A -- Continue to next step.
28. CHECK HARNESS AND CONNECTOR (A/F SENSOR POWER SOURCE)
(a) Check the harnesses and connectors, referring to DTC P0031 inspection procedure P0031.
HINT
- Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
- Make sure there is not an excessive amount of force applied to the wire harness.
NG -- REPAIR POWER SOURCE CIRCUIT P0031
OK -- Continue to next step.
29. CHECK HARNESS AND CONNECTOR (A/F SENSOR - ECM)
(a) Check the harnesses and connectors, referring to DTC P2237 inspection procedure P2237.
HINT
- Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
- Make sure there is not an excessive amount of force applied to the wire harness.
NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- REPLACE AIR FUEL RATIO SENSOR Removal
30. READ FREEZE FRAME DATA
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored Freeze Frame Data.
Result
HINT
- *1: A long time had elapsed after stopping the engine.
- *2: A long time had not elapsed after stopping the engine.
B -- READ FREEZE FRAME DATA
A -- Continue to next step.
31. READ FREEZE FRAME DATA
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Using the Techstream, confirm the vehicle conditions present when the DTC was stored which are recorded in the freeze frame data Freeze Frame Data.
Result
HINT
This step is not directly related to engine stall.
C -- CLEAR DTC
B -- INSPECT ENGINE COOLANT TEMPERATURE SENSOR
A -- Continue to next step.
32. INSPECT THERMOSTAT
(a) Inspect the thermostat Testing and Inspection.
Result
HINT
This step is not directly related to engine stall.
B -- INSPECT ENGINE COOLANT TEMPERATURE SENSOR
A -- REPLACE THERMOSTAT Removal
33. READ FREEZE FRAME DATA
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored Freeze Frame Data.
Result
HINT
*: Use an actual outside temperature estimated from the Initial Intake Air Temp, Ambient Temp for A/C, and (if possible) the weather when the DTC was detected.
B -- CLEAR DTC
A -- Continue to next step.
34. INSPECT ENGINE COOLANT TEMPERATURE SENSOR
(a) Inspect the engine coolant temperature sensor Testing and Inspection.
Result
HINT
Even if the results are normal, the engine coolant temperature sensor may have been malfunctioning. If there are no problems with other parts, replace the engine coolant temperature sensor (refer to step 57).
B -- REPLACE MALFUNCTIONING PARTS
A -- REPLACE ENGINE COOLANT TEMPERATURE SENSOR Removal
35. READ FREEZE FRAME DATA
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored Freeze Frame Data.
Result
HINT
- Try to operate the vehicle under the conditions recorded in the freeze frame data which were present when the malfunction occurred. Confirm the data at this time and the data when the engine is idling (engine warmed up, no load, and shift lever in D or N) and compare these data with the freeze frame data.
- *1: If the throttle body assembly has a temporary problem in which it cannot fully close, the intake air volume and engine speed increase. As a result, the ISC learning amount becomes less than the standard. At this time, if the throttle body assembly returns to normal and fully closes, the intake air volume will be insufficient and the engine may stall.
- *2: If carbon accumulates on the throttle body assembly and the intake air volume decreases, the ISC learning amount is increased to maintain the idling speed. If this situation continues, the ISC learning amount reaches the upper limit, the idling speed cannot be maintained causing idling to become unstable, and the engine may stall.
C -- PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE VVT SYSTEM)
B -- INSPECT THROTTLE BODY
A -- Continue to next step.
36. INSPECT THROTTLE BODY
(a) Check for foreign matter and signs that the throttle body assembly was stuck, and also check that the valve and shaft move smoothly during operation.
Result
HINT
Even if the results are normal, the throttle body assembly may have been malfunctioning. Continue this inspection procedure until step 41, and if there are no problems with other parts, replace the throttle body (refer to step 57).
B -- PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE VVT SYSTEM)
A -- REPLACE THROTTLE BODY Removal
37. INSPECT THROTTLE BODY
(a) Check if carbon is in the air flow passage of the throttle body.
Result
HINT
Even if the results are normal, the throttle body assembly may have been malfunctioning. Continue this inspection procedure until step 41, and if there are no problems with other parts, replace the throttle body (refer to step 57).
B -- PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE VVT SYSTEM)
A -- REPLACE THROTTLE BODY Removal
38. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE VVT SYSTEM)
(a) Connect the Techstream to the DLC3.
(b) Turn the Techstream on.
(c) Warm up the engine.
(d) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT System (Bank 1).
HINT
When performing the Active Test, make sure the A/C is on and the shift lever is in N or P (neutral).
(e) Check the engine speed while operating the Oil Control Valve (OCV) using the Techstream.
OK:
HINT
- Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
- When the results of the inspection using the Active Test are normal but the valve operating noise is abnormal, check the valve for any signs of problems.
- If the camshaft timing oil control valve is stuck ON, the valve overlap increases and combustion worsens due to the internal EGR which may cause rough idle or cause the engine to stall.
NG -- REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY Removal
OK -- Continue to next step.
39. READ FREEZE FRAME DATA
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored Freeze Frame Data.
Result
HINT
- Try to operate the vehicle under the conditions recorded in the freeze frame data which were present when the malfunction occurred. Confirm the data at this time and the data when the engine is idling (engine warmed up, no load, and shift lever in D or N) and compare these data with the freeze frame data.
- Even if the results are normal, the knock sensors may have been malfunctioning. If there are no problems with other parts, replace the knock sensors (refer to step 57).
B -- REPLACE MALFUNCTIONING PARTS
A -- Continue to next step.
40. INSPECT ENGINE COOLANT TEMPERATURE SENSOR
(a) Inspect the engine coolant temperature sensor Testing and Inspection.
NG -- REPLACE ENGINE COOLANT TEMPERATURE SENSOR Removal
OK -- Continue to next step.
41. INSPECT MASS AIR FLOW METER (INTAKE AIR TEMPERATURE SENSOR)
(a) Inspect the mass air flow meter (intake air temperature sensor) Inspection.
NG -- REPLACE MASS AIR FLOW METER Removal
OK -- REPLACE KNOCK SENSOR Removal
42. CHECK HARNESS AND CONNECTOR (FUEL INJECTOR CIRCUIT)
(a) Check the harnesses and connectors, referring to DTC P0300 inspection procedure P0300.
HINT
- Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
- Make sure there is not an excessive amount of force applied to the wire harness.
- A rapid decrease in engine speed may have been caused by a malfunction in all or multiple cylinders. (There may be an electrical malfunction in the wiring shared by all the cylinders.)
NG -- CHECK FUEL INJECTOR CIRCUIT Fuel Injector Circuit
OK -- Continue to next step.
43. CHECK HARNESS AND CONNECTOR (IGNITION COIL POWER SOURCE)
(a) Check the harnesses and connectors, referring to DTC P0351 inspection procedure P0351.
HINT
- Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
- Make sure there is not an excessive amount of force applied to the wire harness.
- A rapid decrease in engine speed may have been caused by a malfunction in all or multiple cylinders. (There may be an electrical malfunction in the wiring shared by all the cylinders.)
NG -- REPAIR IGNITION COIL POWER SOURCE CIRCUIT P0351
OK -- Continue to next step.
44. READ FREEZE FRAME DATA
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored Freeze Frame Data.
Result
B -- READ FREEZE FRAME DATA
A -- Continue to next step.
45. READ VALUE USING TECHSTREAM (IDLE SPARK ADVN CTRL #)
(a) Change the location of the ignition coil for the cylinder whose Idle Spark Advn Ctrl (#1 to #4) was 4° or more in step 44.
(b) Connect the Techstream to the DLC3.
(c) Start the engine.
(d) Using the Techstream, select [Idle Spark Advn Ctrl (#1 to #4)] of the Data List.
Result
HINT
Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
B -- REPLACE IGNITION COIL Removal
A -- Continue to next step.
46. READ FREEZE FRAME DATA
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored Freeze Frame Data.
Result
*1: for A/T.
*2: for M/T.
HINT
- Try to operate the vehicle under the conditions recorded in the freeze frame data which were present when the malfunction occurred. Confirm the data at this time and the data when the engine is idling (engine warmed up, no load, and shift lever in D or N) and compare these data with the freeze frame data.
- The normal value for the ISC learning amount is engine displacement (liters) x 0.9.
- Even if the results are normal, the power steering system or the air conditioning system may have been malfunctioning. Continue this inspection procedure until step 48 (or step 49), and if there are no problems with other parts, inspect the power steering system and the air conditioning system (refer to step 57).
C -- READ FREEZE FRAME DATA
A -- CHECK AIR CONDITIONING SYSTEM How To Proceed With Troubleshooting
B -- Continue to next step.
47. READ FREEZE FRAME DATA
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored Freeze Frame Data.
Result
HINT
- *1: If the Electrical Load Signal display changes from OFF to ON or the "Electric Load Feedback Val" increases, it probably is a malfunction due to a change in electrical load. Check the generator and the continuity and connections between the generator and ECM.
- The normal value for the ISC learning amount is engine displacement (liters) x 0.9.
- Even if the results are normal, the electrical load signal system and/or the A/T system may have been malfunctioning. Continue this inspection procedure until step 48, and if there are no problems with other parts, inspect the electrical load system and/or the A/T system (refer to step 57).
C -- READ FREEZE FRAME DATA
B -- CHECK AUTOMATIC TRANSAXLE SYSTEM
A -- CHECK GENERATOR CIRCUIT Testing and Inspection
48. READ FREEZE FRAME DATA
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored Freeze Frame Data.
Result
HINT
Even if the results are normal, the park/neutral position switch and/or A/T system may have been malfunctioning. If there are no problems with other parts, inspect the park/neutral position switch and/or A/T system (refer to step 57).
C -- REPLACE MALFUNCTIONING PARTS
B -- CHECK AUTOMATIC TRANSAXLE SYSTEM
A -- CHECK PARK/NEUTRAL POSITION SWITCH Inspection
49. READ FREEZE FRAME DATA
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored Freeze Frame Data.
Result
HINT
- *1: If the Electrical Load Signal display changes from OFF to ON or the "Electric Load Feedback Val" increases, it probably is a malfunction due to a change in electrical load. Check the generator and the continuity and connections between the generator and ECM.
- The normal value for the ISC learning amount is engine displacement (liters) x 0.9.
- Even if the results are normal, the electrical load signal system may have been malfunctioning. If there are no problems with other parts, inspect the electrical load system (refer to step 57).
B -- REPLACE MALFUNCTIONING PARTS
A -- CHECK GENERATOR CIRCUIT Testing and Inspection
50. READ FREEZE FRAME DATA
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored Freeze Frame Data.
Result
B -- CHECK HARNESS AND CONNECTOR (FUEL INJECTOR CIRCUIT)
A -- Continue to next step.
51. INSPECT MASS AIR FLOW METER
(a) Remove the mass air flow meter.
(b) Check for foreign matter in the air flow passage of the mass air flow meter.
Result
(c) Install the mass air flow meter.
HINT
Even if the results are normal, the mass air flow meter may have been malfunctioning. Continue this inspection procedure until step 56, and if there are no problems with other parts, replace the mass air flow meter (refer to step 57).
B -- CHECK HARNESS AND CONNECTOR (FUEL INJECTOR CIRCUIT)
A -- REPLACE MASS AIR FLOW METER Removal
52. CHECK HARNESS AND CONNECTOR (FUEL INJECTOR CIRCUIT)
(a) Check the harnesses and connectors, referring to DTC P0300 inspection procedure P0300.
HINT
- Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
- Make sure there is not an excessive amount of force applied to the wire harness.
- A rapid decrease in engine speed may have been caused by a malfunction in all or multiple cylinders. (There may be an electrical malfunction in the wiring shared by all the cylinders.)
NG -- CHECK FUEL INJECTOR CIRCUIT Fuel Injector Circuit
OK -- Continue to next step.
53. CHECK HARNESS AND CONNECTOR (IGNITION COIL POWER SOURCE)
(a) Check the harnesses and connectors, referring to DTC P0351 inspection procedure P0351.
HINT
- Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
- Make sure there is not an excessive amount of force applied to the wire harness.
- A rapid decrease in engine speed may have been caused by a malfunction in all or multiple cylinders. (There may be an electrical malfunction in the wiring shared by all the cylinders.)
NG -- REPAIR POWER SOURCE CIRCUIT P0351
OK -- Continue to next step.
54. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP / SPEED)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Using the Techstream, select the [Control the Fuel Pump / Speed] Active Test.
(d) When performing the Active Test, check for an operating sound from the fuel pump.
OK:
Result
HINT
- Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
- While performing the Active Test, make sure that there is no fuel leakage from the pipes, no signs that fuel has leaked, and no fuel smell.
- If the fuel pump operating noise is abnormal, proceed to step 55.
B -- CHECK FUEL SYSTEM
A -- Continue to next step.
55. INSPECT FUEL PUMP
(a) Inspect the fuel pump Fuel Pump.
NG -- REPLACE FUEL PUMP Removal (to 10/2010)
OK -- CHECK FUEL PUMP CONTROL CIRCUIT Fuel Pump Control Circuit
56. CHECK FUEL SYSTEM
(a) Check for foreign matter such as iron particles around the fuel pump (fuel pump, fuel pump filter and inside the fuel tank), and for signs that the fuel pump was stuck.
Result
B -- REPLACE MALFUNCTIONING PARTS
A -- REPAIR OR REPLACE FUEL SYSTEM
57. REPLACE MALFUNCTIONING PARTS
(a) If the malfunction could not be identified in steps 3 to 24, replace the part which is suspected to be malfunctioning according to the step where an inspection was performed.
(b) If the malfunction could not be identified in steps 25 to 34, replace the part which is suspected to be malfunctioning according to the step where an inspection was performed.
(c) If the malfunction could not be identified in steps 35 to 41, replace the part which is suspected to be malfunctioning according to the step where an inspection was performed.
(d) If the malfunction could not be identified in steps 42 to 49, inspect and repair the part which is suspected to be malfunctioning according to the step where an inspection was performed.
(e) If the malfunction could not be identified in steps 50 to 56, replace the part which is suspected to be malfunctioning according to the step where an inspection was performed.
HINT
Referring to the chart, inspect and repair or replace the part from the step where an inspection was performed.
NEXT -- Continue to next step.
58. CLEAR DTC
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Clear DTCs Reading and Clearing Diagnostic Trouble Codes.
NEXT -- Continue to next step.
59. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED
(a) Check if engine stall symptoms are present.
HINT
If any engine stall symptoms are present, recheck for DTCs and freeze frame data and perform an inspection.
NG -- REPAIR OR REPLACE MALFUNCTIONING PARTS
OK -- END