Part 3

1NR-FE ENGINE CONTROL: SFI SYSTEM: P1603, P1605: Engine Stall History

28. INSPECT 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 (A/F SENSOR POWER SOURCE) 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 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 OR 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.

B -- INSPECT ENGINE COOLANT TEMPERATURE SENSOR

C -- CLEAR DTC
A -- Continue to next step.

32. INSPECT WATER INLET (THERMOSTAT)

(a) Inspect the water inlet (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

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 with motor 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 with motor 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 with motor 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.

B -- INSPECT THROTTLE WITH MOTOR BODY ASSEMBLY

C -- PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE VVT LINEAR)
A -- Continue to next step.

36. INSPECT THROTTLE WITH MOTOR BODY ASSEMBLY

(a) Check for foreign matter and signs that the throttle with motor 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 with motor 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 with motor body assembly (refer to step 57).

B -- PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE VVT LINEAR)

A -- REPLACE THROTTLE WITH MOTOR BODY ASSEMBLY Removal

38. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE VVT LINEAR)

(a) Perform 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.
- If the camshaft timing oil control valve (for intake camshaft) is stuck at the advanced side, 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 (FOR INTAKE) Removal
OK -- Continue to next step.

39. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE VVT EXHAUST LINEAR)

(a) Perform the Active Test, referring to DTC P0014 inspection procedure P0014.

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 (for exhaust camshaft) is stuck at the retard side, 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 (FOR EXHAUST) Removal
OK -- Continue to next step.

40. 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 -- REPLACE ENGINE COOLANT TEMPERATURE SENSOR Removal
A -- Continue to next step.

42. INSPECT MASS AIR FLOW METER (INTAKE AIR TEMPERATURE SENSOR)

(a) Inspect the mass air flow meter (intake air temperature sensor) Inspection.

Result

B -- REPLACE MASS AIR FLOW METER Removal

A -- REPLACE KNOCK SENSOR Removal

43. INSPECT TERMINAL VOLTAGE (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.

44. INSPECT TERMINAL VOLTAGE (POWER SOURCE OF NO. 1 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 IGNITION COIL POWER SOURCE CIRCUIT P0351
OK -- Continue to next step.

45. 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.

46. 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 45.

(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 NO. 1 IGNITION COIL Removal
A -- 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
- 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 49, and if there are no problems with other parts, inspect the power steering system and the air conditioning system (refer to step 57).

B -- CHECK AIR CONDITIONING SYSTEM How To Proceed With Troubleshooting
A -- Continue to next step.

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
- *1: If the Electrical Load Signal 1 (2) 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.
- If the vehicle speed is 18 km/h (11 mph) or less and the difference between Engine Speed and SPD (NT) is 100 rpm or less, inspect the CVT. (Depending on the rate of vehicle deceleration, the engine speed may have decreased due to the CVT lock-up release being late.)
- 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 CVT 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 CVT system (refer to step 57).

B -- CHECK CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM

C -- READ FREEZE FRAME DATA

A -- CHECK GENERATOR CIRCUIT Component Tests and General Diagnostics

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
Even if the results are normal, the park/neutral position switch assembly and/or CVT system may have been malfunctioning. If there are no problems with other parts, inspect the park/neutral position switch assembly and/or CVT system (refer to step 57).

B -- CHECK CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM

C -- REPLACE MALFUNCTIONING PARTS

A -- CHECK PARK/NEUTRAL POSITION SWITCH ASSEMBLY Component Tests and General Diagnostics

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 -- INSPECT TERMINAL VOLTAGE (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) Reinstall 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 -- INSPECT TERMINAL VOLTAGE (FUEL INJECTOR CIRCUIT)

A -- REPLACE MASS AIR FLOW METER Removal

52. INSPECT TERMINAL VOLTAGE (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. INSPECT TERMINAL VOLTAGE (POWER SOURCE OF NO. 1 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 IGNITION COIL 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 56.

B -- CHECK FUEL SYSTEM
A -- Continue to next step.

55. INSPECT FUEL PUMP

(a) Inspect the fuel pump Inspection.

NG -- REPLACE FUEL PUMP Removal

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, and for signs that the fuel pump was stuck.

Result

HINT
If there is foreign matter such as iron particles on the fuel pump, remove the foreign matter.

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 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 ignition switch to ON.

(c) Clear the 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