Part 3
2GR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1603,P1605: Engine Stall History - Continued
P1605 - Rough Idling
35. READ FREEZE FRAME DATA
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(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 P 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 -- CHECK THROTTLE BODY ASSEMBLY
A -- Continue to next step.
36. CHECK THROTTLE BODY ASSEMBLY
(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 42, and if there are no problems with other parts, replace the throttle body assembly (refer to step 57).
B -- PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE VVT SYSTEM)
A -- REPLACE THROTTLE BODY ASSEMBLY Removal
37. CHECK THROTTLE BODY ASSEMBLY
(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 42, and if there are no problems with other parts, replace the throttle body assembly (refer to step 57).
B -- PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE VVT SYSTEM)
A -- REPLACE THROTTLE BODY ASSEMBLY Removal
38. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE VVT SYSTEM)
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Warm up the engine.
(e) Enter the following menus: Powertrain / Engine / Active Test / Control the VVT System (Bank 1) or Control the VVT System (Bank 2).
HINT
When performing the Active Test, make sure the A/C is on and the shift lever is in P or N.
(f) 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
OK -- Continue to next step.
39. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE VVT EXHAUST LINEAR)
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Start the engine and warm it up.
(e) Enter the following menus: Powertrain / Engine / Active Test / Control the VVT Exhaust Linear (Bank 1) or Control the VVT Exhaust Linear (Bank 2).
(f) Check the engine speed while operating the camshaft timing oil control valve 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
OK -- Continue to next step.
40. READ FREEZE FRAME DATA
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(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 P or N) and compare these data with the freeze frame data.
- Even if the results are normal, the knock control sensors may have been malfunctioning. If there are no problems with other parts, replace the knock control sensors (refer to step 57).
B -- REPLACE MALFUNCTIONING PARTS
A -- Continue to next step.
41. INSPECT ENGINE COOLANT TEMPERATURE SENSOR
HINT
For the engine coolant temperature inspection, refer to the following procedures Testing and Inspection.
NG -- REPLACE ENGINE COOLANT TEMPERATURE SENSOR
OK -- Continue to next step.
42. INSPECT MASS AIR FLOW METER
(a) Inspect the mass air flow meter Testing and Inspection.
HINT
If the intake air temperature sent to the ECM is higher than the standard due to the mass air flow meter (intake air temperature sensor) malfunctioning, the ignition timing may become delayed.
NG -- REPLACE MASS AIR FLOW METER Removal
OK -- REPLACE KNOCK SENSOR Removal
43. CHECK HARNESS AND CONNECTOR (FUEL INJECTOR POWER SOURCE)
(a) Disconnect the fuel injector connector.
(b) Turn the engine switch on (IG).
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
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.)
(d) Reconnect the fuel injector connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (FUEL INJECTOR - IG2 RELAY)
OK -- Continue to next step.
44. CHECK HARNESS AND CONNECTOR (IGNITION COIL POWER SOURCE)
(a) Disconnect the ignition coil connector.
(b) Turn the engine switch on (IG).
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
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.)
(d) Reconnect the ignition coil connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION COIL - IG2 RELAY)
OK -- Continue to next step.
45. READ FREEZE FRAME DATA
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(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
Result:
B -- READ FREEZE FRAME DATA
A -- Continue to next step.
46. READ FREEZE FRAME DATA
(a) Change the location of the ignition coil for the cylinder whose Idle Spark Advn Ctrl (#1 to #6) was 4° or more in step 45.
(b) Connect the Techstream to the DLC3.
(c) Turn the engine switch on (IG).
(d) Turn the Techstream on.
(e) Enter the following menus: Powertrain / Engine / Data List / Idle Spark Advn Ctrl (#1 to #6).
Result
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.
47. READ FREEZE FRAME DATA
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(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:
*: Check not only the ON / OFF state of the air conditioner but also the change in air conditioner load.
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 P 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 may have been malfunctioning. Continue this inspection procedure until step 49, and if there are no problems with other parts, inspect the power steering system (refer to step 57).
B -- CHECK AIR CONDITIONING SYSTEM
A -- Continue to next step.
48. READ FREEZE FRAME DATA
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(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:
*: 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.
HINT
- 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 49, 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 TRANSMISSION SYSTEM
A -- CHECK GENERATOR CIRCUIT Component Tests and General Diagnostics
49. READ FREEZE FRAME DATA
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(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 -- PERFORM CONFIRMATION DRIVING PATTERN
B -- CHECK AUTOMATIC TRANSMISSION SYSTEM
A -- CHECK PARK/NEUTRAL POSITION SWITCH
50. READ FREEZE FRAME DATA
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(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 POWER SOURCE)
A -- Continue to next step.
51. CHECK 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 POWER SOURCE)
A -- REPLACE MASS AIR FLOW METER Removal
52. CHECK HARNESS AND CONNECTOR (FUEL INJECTOR POWER SOURCE)
(a) Disconnect the fuel injector connector.
(b) Turn the engine switch on (IG).
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
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.)
(d) Reconnect the fuel injector connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (FUEL INJECTOR - IG2 RELAY)
OK -- Continue to next step.
53. CHECK HARNESS AND CONNECTOR (IGNITION COIL POWER SOURCE)
(a) Disconnect the ignition coil connector.
(b) Turn the engine switch on (IG).
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
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.)
(d) Reconnect the ignition coil connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION COIL - IG2 RELAY)
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 engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump / Speed.
(e) Check whether the fuel pump operating sound occurs when performing the Active Test on the Techstream.
Specified Condition:
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) Disconnect the fuel pump connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
(c) Reconnect the fuel pump (for low pressure) connector.
NG -- REPLACE FUEL PUMP Removal
OK -- CHECK FUEL PUMP CONTROL SYSTEM
56. CHECK FUEL SYSTEM
(a) Check for foreign matter such as iron particles around the fuel pump (fuel pump, fuel pump filter, the fuel tank), and for signs that the fuel pump was stuck.
Result:
B -- REPLACE MALFUNCTIONING PARTS
A -- REPAIR OR REPLACE FUEL SYSTEM (FOR LOW PRESSURE)
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 42, 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 43 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 engine switch on (IG).
(c) Turn the Techstream on.
(d) Clear the DTCs DTC Check / Clear.
NEXT -- Continue to next step.
59. PERFORM CONFIRMATION DRIVING PATTERN
(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, COMPONENT AND AREA
OK -- END