Part 2

1GR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P043E, P043F, P2401, P2402, P2419 (Continued)

14. INSPECT VACUUM SWITCHING VALVE ASSEMBLY NO. 1

(a) Turn the ignition switch off.
(b) Disconnect the purge VSV connector.
(c) Disconnect the hose (connected to the canister) from the purge VSV.
(d) Start the engine.
(e) Use your finger to confirm that the purge VSV has no suction.

Result

(f) Reconnect the purge VSV connector.
(g) Reconnect the hose.
B -- REPLACE VACUUM SWITCHING VALVE ASSEMBLY NO. 1 (PURGE VSV)
A -- REPLACE ECM
15. CHECK EVAP HOSE (PURGE VSV - THROTTLE BODY)

(a) Disconnect the hose (connected to the throttle body) from the purge VSV.
(b) Start the engine.
(c) Use your finger to confirm that the hose has suction.

Result

(d) Reconnect the hose.
B -- INSPECT THROTTLE W/MOTOR BODY ASSEMBLY (EVAP PURGE PORT)
A -- Continue to next step.

16. INSPECT VACUUM SWITCHING VALVE ASSEMBLY NO. 1 (PURGE VSV)

(a) Remove the purge VSV.
(b) Apply battery voltage to the terminals of the purge VSV.
(c) Using an air gun, confirm that air flows from port A to port B.

Result

(d) Reinstall the purge VSV.
B -- REPLACE VACUUM SWITCHING VALVE ASSEMBLY NO. 1 (PURGE VSV)
A -- Continue to next step.

17. CHECK HARNESS AND CONNECTOR (POWER SOURCE OF PURGE VSV)

(a) Disconnect the purge VSV connector.
(b) Turn the ignition switch to ON.
(c) Measure the voltage between terminal 1 of the purge VSV connector and the body ground.

Result

(d) Reconnect the purge VSV connector.
B -- REPAIR OR REPLACE HARNESS OR CONNECTOR
A -- Continue to next step.

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

(a) Disconnect the ECM connector and the V4 purge VSV connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:

(c) Reconnect the purge VSV connector.
(d) Reconnect the ECM connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE ECM
19. PERFORM ACTIVE TEST USING TECHSTREAM (FOR VENT VALVE)

(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON and turn the Techstream on.
(c) Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the VSV for Vent Valve.
(d) Measure the voltage between terminal VPMP of the ECM connector and the body ground when the vent valve is turned ON (close) and OFF (vent) using the Techstream.

Result

B -- REPLACE ECM
A -- INSPECT CANISTER PUMP MODULE (VENT VALVE OPERATION)
20. PERFORM ACTIVE TEST USING TECHSTREAM (FOR VENT VALVE)

(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON and turn the Techstream on.
(c) Enter the following menus: Powertrain / Engine and ECT / Activate the VSV for Vent Valve.
(d) Measure the voltage between terminal VPMP of the ECM connector and the body ground when the vent valve is turned ON (close) and OFF (vent) using the Techstream.

Result

C -- REPLACE ECM
B -- INSPECT CANISTER PUMP MODULE (VENT VALVE OPERATION)
A -- Continue to next step.

21. INSPECT CANISTER PUMP MODULE (POWER SOURCE FOR VENT VALVE)

(a) Turn the ignition switch off.
(b) Disconnect the canister pump module connector.
(c) Turn the ignition switch to ON.
(d) Measure the voltage according to the value(s) in the table below.

Result

(e) Reconnect the canister pump module connector.
B -- REPAIR OR REPLACE HARNESS OR CONNECTOR
A -- Continue to next step.

22. INSPECT CANISTER PUMP MODULE (VENT VALVE OPERATION)

(a) Turn the ignition switch off.
(b) Disconnect the canister pump module connector.
(c) Apply the battery voltage to terminals 9 and 8 of the canister pump module.
(d) Touch the canister pump module to confirm the vent valve operation.

Result

(e) Reconnect the canister pump module connector.
B -- REPLACE CANISTER ASSEMBLY
A -- REPAIR OR REPLACE HARNESS OR CONNECTOR
23. PERFORM ACTIVE TEST USING TECHSTREAM (FOR CANISTER PUMP MODULE (LEAK DETECTION PUMP))

(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON and turn the Techstream on.
(c) Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the Vacuum Pump.
(d) Measure the voltage between terminal MPMP of the ECM connector and the body ground when the leak detection pump is turned ON and OFF using the Techstream.

Result

B -- REPLACE ECM
A -- Continue to next step.

24. CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - ECM)

(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch off.
(c) Disconnect the canister connector.
(d) Turn the ignition switch to ON and turn the Techstream on.
(e) Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the Vacuum Pump.
(f) Turn the leak detection pump ON.
(g) Measure the voltage between terminal 1 (MTRB) of the canister connector and the body ground.

Result

(h) Reconnect the canister connector.
B -- REPAIR OR REPLACE HARNESS OR CONNECTOR
A -- Continue to next step.

25. CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - GROUND)

(a) Disconnect the canister connector.
(b) Turn the ignition switch off.
(c) Measure the resistance according to the value(s) in the table below.

Result

(d) Reconnect the canister connector.
B -- REPAIR OR REPLACE HARNESS OR CONNECTOR
A -- REPLACE CANISTER ASSEMBLY
26. INSPECT THROTTLE W/MOTOR BODY ASSEMBLY (EVAP PURGE PORT)
(a) Stop the engine.
(b) Disconnect the EVAP hose from the throttle body.
(c) Start the engine.
(d) Use your finger to confirm that the port of the throttle body has suction.

Result

(e) Reconnect the EVAP hose.
B -- INSPECT THROTTLE WITH MOTOR BODY ASSEMBLY
A -- REPLACE EVAP HOSE (THROTTLE BODY - PURGE VSV)
27. CORRECTLY REINSTALL OR REPLACE FUEL CAP ASSEMBLY
HINT:
- When reinstalling the fuel cap, tighten it until a few click sounds are heard.
- When replacing the fuel cap, use a fuel cap that meets OEM specifications, and install it until a few click sounds are heard.

NEXT -- PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE)
28. REPLACE FUEL CAP ASSEMBLY
HINT: When installing the fuel cap, tighten it until a few click sounds are heard.

NEXT -- PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE)
29. REPAIR LOCATE EVAP LEAK
(a) Reinstall the fuel cap.
(b) Disconnect the vent hose.

(d) Pressurize the EVAP system to 3.2 to 3.7 kPa (24 to 28 mmHg).
(e) Apply soapy water to the piping and connecting parts of the EVAP system.
(f) Look for areas where bubbles appear. This indicates leak point.
(g) Repair or replace the leak point.
HINT: Disconnect the hose between the canister and the fuel tank from the canister. Block the canister side and conduct an inspection. In this way, the fuel tank can be excluded as an area suspected of causing fuel leaks.

NEXT -- PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE)
30. REPLACE CANISTER ASSEMBLY
(a) Replace the canister assembly Removal.

NOTICE: When replacing the canister, check the canister pump module interior and related pipes for water, fuel or other liquids. If liquids are present, check for disconnections and/or cracks in the following: 1) the pipe from the air inlet port to the canister pump module: 2) the canister filter; and 3) the fuel tank vent hose.

NEXT -- PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE)
31. REPLACE VACUUM SWITCHING VALVE ASSEMBLY NO. 1 (PURGE VSV)

(a) Disconnect the connector and the hoses from the purge VSV.
(b) Remove the purge VSV.
(c) Install a new purge VSV.
(d) Reconnect the connector and hoses.
NEXT -- PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE)
32. REPAIR OR REPLACE HARNESS OR CONNECTOR
NEXT -- PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE)
33. REPLACE EVAP HOSE (THROTTLE BODY - PURGE VSV)
NEXT -- PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE)
34. INSPECT THROTTLE WITH MOTOR BODY ASSEMBLY
(a) Remove the throttle with motor body Removal.
(b) Check that the EVAP purge port of the throttle body is not clogged. If necessary, replace the throttle body.
NEXT -- PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE)
35. REPLACE ECM
(a) Replace the ECM Removal.
NEXT -- PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE)
36. REPAIR OR REPLACE PARTS OR COMPONENTS INDICATED BY OUTPUT DTCS
(a) Repair the malfunctioning areas indicated by the DTCs that had been confirmed when the vehicle was brought in.
NEXT -- PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE)
37. PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE)
NOTICE:
- In the Evaporative System Check (Automatic Mode), the series of 5 Evaporative System Check steps is performed automatically. It takes a maximum of approximately 18 minutes.
- Do not perform the Evaporative System Check when the fuel tank is more than 90% full because the cut-off valve may be closed and making the leak check of the fuel tank unavailable.
- Do not run the engine in this step.
- When the temperature of the fuel is 35°C (95°F) or more, a large amount of vapor forms and any check results become inaccurate. When performing an Evaporative System Check, keep the temperature below 35°C (95°F).
(a) Clear DTCs DTC Check / Clear.
(b) On the Techstream, enter the following menus: Powertrain / Engine and ECT / Utility / Evaporative System Check / Automatic Mode.
(c) After the Evaporative System Check is completed, check for pending DTCs by entering the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending.
HINT: If no pending DTC is found, the repair has been successfully completed.

NEXT -- END

MONITOR DESCRIPTION

5 hours* after the ignition switch is turned off, the electric leak detection pump creates negative pressure (vacuum) in the EVAP (Evaporative Emission) system. The ECM monitors for leaks and actuator malfunctions based on the EVAP pressure.
HINT: *: If the engine coolant temperature is not below 35°C (95°F) 5 hours after the ignition switch is turned off, the monitor check starts 2 hours later. If it is still not below 35°C (95°F) 7 hours after the ignition switch is turned off, the monitor check starts 2.5 hours later.

* If only a small amount of fuel is in the fuel tank, it takes longer for the EVAP pressure to stabilize.

1 P043E: Reference orifice clogged
In operation B, the leak detection pump creates negative pressure (vacuum) through the reference orifice. The EVAP system pressure is then measured by the ECM, using the canister pressure sensor, to determine the 0.02 inch leak criterion. If the pressure is lower than -4.85 kPa (-36.38 mmHg)*, the ECM interprets this as a clog malfunction in the reference orifice, and stops the EVAP (Evaporative Emission) system monitor. The ECM then illuminates the MIL and sets the DTC (2 trip detection logic).
*: The threshold varies according to the atmospheric pressure measured in operation A. The value described above is based on an atmospheric pressure of 100 kPa (750.1 mmHg): absolute pressure.

2 P043F: Reference orifice high-flow
In operation B, the leak detection pump creates negative pressure (vacuum) through the reference orifice. The EVAP system pressure is then measured by the ECM using the canister pressure sensor to determine the 0.02 inch leak criterion. If the pressure is higher than -1.06 kPa (-7.95 mmHg)*, the ECM interprets this as a high-flow malfunction in the reference orifice, and stops the EVAP system monitor. The ECM then illuminates the MIL and sets the DTC (2 trip detection logic).
*: The threshold varies according to the atmospheric pressure measured in operation A. The value described above is based on a atmospheric pressure of 100 kPa (750.1 mmHg): absolute pressure.

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

MONITOR RESULT

Detailed information on Checking Monitor Status Mode 6 Data.