Part 3

2ZR-FE ENGINE CONTROL: SFI SYSTEM: P1603, P1605; Engine Stall History; 2013 MY Corolla [07/2012 -]
P1605 - Rough Idling

20. INSPECT THERMOSTAT

(a) Inspect the thermostat Testing and Inspection.

Result

B -- INSPECT ENGINE COOLANT TEMPERATURE SENSOR

A -- REPLACE THERMOSTAT Removal

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

HINT
*: Use an actual outside temperature estimated from the Initial Intake Air, Ambient Temp for A/C, and (if possible) the weather when the DTC was detected.

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:

HINT
If the purge VSV is stuck closed, air fuel ratio compensation by the purge VSV 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 / SPEED)
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 VSV.

(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 and ECT / Active Test / Activate the VSV for Evap Control.

(f) Operate the purge VSV and check the air flow.

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 / SPEED)
A -- Continue to next step.

26. INSPECT PURGE VSV

(a) Inspect the purge VSV Testing and Inspection.

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

27. CHECK TERMINAL VOLTAGE (PURGE VSV POWER SOURCE)

(a) Disconnect the purge VSV connector.

(b) Turn the ignition switch to ON.

(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.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (PURGE VSV - EFI MAIN RELAY)
OK -- Continue to next step.

28. CHECK HARNESS AND CONNECTOR (PURGE VSV - ECM)

(a) Check harness and connector.

HINT
* Refer to DTC P0443 inspection procedure for Mexico models P0443.
* Refer to EVAP System inspection procedure except Mexico models EVAP System.
* 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 (ACTIVATE THE VSV FOR EVAP CONTROL)

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

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 / SPEED)

(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 and ECT / Active Test / Control the Fuel Pump / Speed.

(e) Check whether the fuel pump operating sound occurs when performing the Active Test on the Techstream.

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

(a) Inspect the fuel pump Inspection.

NG -- REPLACE FUEL PUMP Removal

OK -- CHECK FUEL PUMP CONTROL CIRCUIT 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.

* Perform the Active Test [Control the All Cylinders 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.