Part 3

2AZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1603, P1605: Engine Stall History

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

(a) Connect the Techstream to the DLC3.

(b) Start the engine.

(c) Turn the Techstream on.

(d) Warm up the engine.

(e) Using the Techstream, select the [Control the VVT Linear (Bank1)] Active Test.

HINT
When performing the Active Test, make sure the A/C is on and the shift lever is in N or P (neutral).

(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 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).

A -- CHECK AIR CONDITIONING SYSTEM How To Proceed With Troubleshooting

C -- READ FREEZE FRAME DATA
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 1 (3) 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 25 km/h (15 mph) or less and the difference between Engine Speed and SPD (NT) is 100 rpm or less, inspect the automatic transaxle. (Depending on the rate of vehicle deceleration, the engine speed may have decreased due to the A/T 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 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).

B -- CHECK AUTOMATIC TRANSAXLE SYSTEM

C -- READ FREEZE FRAME DATA

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).

B -- CHECK AUTOMATIC TRANSAXLE SYSTEM

C -- REPLACE MALFUNCTIONING PARTS

A -- CHECK PARK/NEUTRAL POSITION SWITCH 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

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 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 (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