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Home >> Toyota >> 2012 >> Yaris Hatchback L4-1.5L (1NZ-FE) >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> P Code Charts >> P1603 >> Part 2

Part 2





1NZ-FE ENGINE CONTROL: SFI SYSTEM (for Hatchback): P1603, P1605: Engine Stall History
P1605 - Rough Idling- (Continued)

10. 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 P0031
OK -- Continue to next step.

11. 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.
* Perform "Inspection After Repair" after replacing the air fuel ratio sensor Programming and Relearning.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE AIR FUEL RATIO SENSOR Removal (from 07/2011)

12. 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 (from 07/2011).

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.

13. 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 (from 07/2011).





Result





HINT
This step is not directly related to engine stall.

B -- INSPECT ENGINE COOLANT TEMPERATURE SENSOR

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

14. 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 (from 07/2011)

15. 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 (from 07/2011).

Result





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

16. 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. Continue this inspection procedure until step 24, and if there are no problems with other parts, replace the engine coolant temperature sensor (refer to step 57).
* Perform "Inspection After Repair" after replacing the engine coolant temperature sensor Programming and Relearning.

B -- READ FREEZE FRAME DATA

A -- REPLACE ENGINE COOLANT TEMPERATURE SENSOR Removal (from 07/2011)

17. 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 (from 07/2011).

Result





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.

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

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





Text in Illustration





(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch to ON and turn the Techstream 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.
* Even if the results are normal, the purge VSV may have been malfunctioning. Continue this inspection procedure until step 24, and if there are no problems with other parts, replace the purge VSV (refer to step 57).

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

19. INSPECT PURGE VSV

(a) Inspect purge VSV Testing and Inspection.

NG -- REPLACE PURGE VSV Removal (from 07/2011)
OK -- Continue to next step.

20. CHECK HARNESS AND CONNECTOR (PURGE VSV POWER SOURCE)

(a) Check the harnesses and connectors, referring to DTC P0443 inspection procedure P0443.

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 P0443
OK -- Continue to next step.

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

(a) Check the harnesses and connectors, referring to DTC P0443 inspection procedure P0443.

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 ECM Removal (from 07/2011)

22. 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 23.

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

23. INSPECT FUEL PUMP

(a) Inspect the fuel pump Testing and Inspection.

HINT
Perform "Inspection After Repair" after replacing the fuel pump Programming and Relearning.

NG -- REPLACE FUEL PUMP Removal (from 07/2011)

OK -- CHECK FUEL PUMP CONTROL CIRCUIT Fuel Pump Control Circuit (from 07/2011)

24. 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





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

B -- REPLACE MALFUNCTIONING PARTS

A -- REPAIR OR REPLACE FUEL SYSTEM Fuel System (for Hatchback)

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 (from 07/2011).

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 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)

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

26. 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





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).
* Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly Programming and Relearning.

B -- READ FREEZE FRAME DATA

A -- REPLACE MASS AIR FLOW METER Removal (from 07/2011)

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:





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. 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 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.
* Perform "Inspection After Repair" after replacing the air fuel ratio sensor Programming and Relearning.

NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR

OK -- REPLACE AIR FUEL RATIO SENSOR Removal (from 07/2011)

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 (from 07/2011).

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.
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