Part 2

FA20 ENGINE CONTROL: SFI SYSTEM: P1603; Engine Stall History; 2013 MY FR-S [03/2012 -]
P1603 - Engine Stall History (Continued)

21. 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.

22. 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.

23. CHECK HARNESS AND CONNECTOR (ECM - ENGINE COOLANT TEMPERATURE SENSOR)

(a) Disconnect the ECM connector.

(b) Disconnect the engine coolant temperature sensor connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance (Check for open):

Standard Resistance (Check for short):

HINT
If the purge valve is stuck closed, air-fuel ratio compensation by the purge valve is incorrectly adjusted, and then the air-fuel ratio becomes lean and the engine may stall.

B -- PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP DUTY)
A -- Continue to next step.

25. PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE VSV FOR EVAP CONTROL)

(a) Disconnect the purge hose (on the canister side) of the purge valve.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch to ON.

(d) Start the engine.

(e) Enter the following menus: Powertrain / Engine / Active Test / Activate the VSV for Evap Control.

(f) Operate the purge valve and check the airflow.

OK:

Result

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

B -- PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP DUTY)
A -- Continue to next step.

26. INSPECT PURGE VALVE

(a) Inspect the purge valve Testing and Inspection.

NG -- REPLACE PURGE VALVE Removal
OK -- Continue to next step.

27. CHECK TERMINAL VOLTAGE (PURGE VALVE POWER SOURCE)

(a) Disconnect the purge valve connector.

(b) Turn the ignition switch to ON.

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Standard Resistance (Check for short):

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 -- Continue to next step.

29. CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.

NEXT -- Continue to next step.

30. READ VALUE USING TECHSTREAM (EVAP (Purge) VSV)

(a) Connect the Techstream to the DLC3.

(b) Start the engine and warm it up until the engine coolant temperature stabilizes.

HINT
The A/C switch and all accessory switches should be off.

(c) Idle the engine for 15 minutes or more.

(d) Using the Techstream, read the value of EVAP (Purge) VSV in the Data List.

Standard:

Result

B -- CHECK FOR INTERMITTENT PROBLEMS Check For Intermittent Problems
A -- Continue to next step.

31. PERFORM ACTIVE TEST USING TECHSTREAM

(a) Disconnect the purge hose (on the canister side) of the purge valve.

Result

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

B -- CHECK FOR INTERMITTENT PROBLEMS Check For Intermittent Problems
A -- Continue to next step.

32. CHECK CONNECTOR CONNECTION CONDITION (ECM)

(a) Check the ECM connector connection condition.

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 -- RECONNECT CONNECTOR CORRECTLY

OK -- REPLACE ECM Removal

33. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP DUTY)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump Duty.

(e) When performing the Active Test, check for an operating sound from the fuel pump.

Standard:

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 34.

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

34. INSPECT FUEL PUMP ASSEMBLY

(a) Inspect the fuel pump assembly Inspection.

NG -- REPLACE FUEL PUMP ASSEMBLY Removal

OK -- CHECK FUEL PUMP CONTROL CIRCUIT (LOW PRESSURE SIDE) Fuel Pump Control Circuit

35. CHECK FUEL SYSTEM

(a) Check the fuel system.

* Check the fuel pump operation.

* Check the fuel leaks.

* Check the fuel pressure (low pressure side).

* Check the fuel pressure (high pressure side).

* Perform the Active Test [D-4S (Fuel Cut)].

HINT
For the fuel system On-vehicle Inspection, refer to the following procedures Fuel System.

Result

B -- CHECK FOR INTERMITTENT PROBLEMS Check For Intermittent Problems
A -- Continue to next step.

36. CHECK FUEL SYSTEM

(a) Check for foreign matter such as iron particles around the fuel pump assembly (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 -- REPAIR OR REPLACE FUEL SYSTEM
A -- Continue to next step.

37. CHECK FUEL SYSTEM

(a) Check the fuel system.

* Check the fuel pump operation.

* Check the fuel leaks.

* Check the fuel pressure (low pressure side).

* Check the fuel pressure (high pressure side).

* Perform the Active Test [D-4S (Fuel Cut)].

HINT
For the fuel system On-vehicle Inspection, refer to the following procedures Fuel System.

NG -- REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

OK -- END

38. CHECK IGNITION SYSTEM

(a) Perform ignition system On-vehicle Inspection Testing and Inspection.

NG -- REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA
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
* *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.

B -- PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE INJECTION VOLUME FOR A/F SENSOR)

C -- READ FREEZE FRAME DATA
A -- Continue to next step.

40. CHECK MASS AIR FLOW METER

(a) Remove the mass airflow meter.

(b) Check for foreign matter in the airflow passage of the mass air flow meter.

Result

B -- REPLACE MASS AIR FLOW METER Removal
A -- Continue to next step.