Part 2

2TR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1603,P1605: Engine Stall History
P1605 - Rough Idling - Continued

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
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

27. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE INJECTION VOLUME)

(a) Connect the Techstream to the DLC3.

(b) Start the engine.

(c) Turn the Techstream on.

(d) Warm up the engine.

(e) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume.

(f) Change the fuel injection volume using the Techstream, and monitor the voltage output of the air fuel ratio and heated oxygen sensors displayed on the Techstream.

Standard Voltage:

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 TERMINAL VOLTAGE (POWER SOURCE OF AIR FUEL RATIO SENSOR)

(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 (AIR FUEL RATIO SENSOR - ECM)

(a) Check the harnesses and connectors, referring to DTC P014C inspection procedure P014C.

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.

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

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
Even if the results are normal, the throttle body 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) Performing the Active Test, referring to DTC P0011 inspection procedure P0011.

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.

NG -- REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY Disassembly
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
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

OK -- REPLACE KNOCK SENSOR Removal

42. CHECK TERMINAL VOLTAGE (POWER SOURCE OF FUEL INJECTOR)

(a) Check the harnesses and connectors, referring to Fuel Injector Circuit inspection procedure Component Tests and General Diagnostics.

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 FUEL INJECTOR CIRCUIT Component Tests and General Diagnostics
OK -- Continue to next step.

43. CHECK TERMINAL VOLTAGE (POWER SOURCE OF IGNITION COIL)

(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.

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 (#1 TO #4))

(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) Turn the ignition switch to ON.

(d) Enter the following menus: Powertrain / Engine and ECT / Data List / Idle Spark Advn Ctrl (#1 to #4).

Result

HINT
Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.

A -- REPLACE IGNITION COIL
B -- 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 Automatic Transmission Models

*2: for Manual Transmission Models

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: Check not only the on/off state of the air conditioner, but also the change in air conditioner load.
* The normal value for the ISC compensation 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 48, and if there are no problems with other parts, inspect the power steering system (refer to step 57).

C -- READ FREEZE FRAME DATA

B -- READ FREEZE FRAME DATA

A -- CHECK AIR CONDITIONING SYSTEM

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 compensation amount is engine displacement (liters) x 0.9.
* Even if the results are normal, the electrical load signal system and/or automatic transmission 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 automatic transmission system (refer to step 57).

C -- READ FREEZE FRAME DATA

B -- CHECK AUTOMATIC TRANSMISSION 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 automatic transmission system may have been malfunctioning. If there are no problems with other parts, inspect the park/neutral position switch and/or automatic transmission system (refer to step 57).

C -- REPLACE MALFUNCTIONING PARTS

B -- CHECK AUTOMATIC TRANSMISSION SYSTEM

A -- CHECK PARK/NEUTRAL POSITION SWITCH

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 TERMINAL VOLTAGE (POWER SOURCE OF FUEL INJECTOR)
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 airflow 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 55, and if there are no problems with other parts, replace the mass air flow meter (refer to step 57).

B -- CHECK TERMINAL VOLTAGE (POWER SOURCE OF FUEL INJECTOR)

A -- REPLACE MASS AIR FLOW METER Testing and Inspection

52. CHECK TERMINAL VOLTAGE (POWER SOURCE OF FUEL INJECTOR)

(a) Check the harnesses and connectors, referring to Fuel Injector Circuit inspection procedure Component Tests and General Diagnostics.

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 Component Tests and General Diagnostics
OK -- Continue to next step.

53. CHECK TERMINAL VOLTAGE (POWER SOURCE OF IGNITION COIL)

(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) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump / Speed.

(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

OK -- CHECK FUEL PUMP CONTROL CIRCUIT Component Tests and General Diagnostics

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 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

OK -- END