Part 2

4GR-FSE ENGINE CONTROL SYSTEM: SFI SYSTEM: P043E: Evaporative Emission System Reference Orifice Clog Up - Continued

21. INSPECT CANISTER ASSEMBLY (POWER SOURCE FOR VENT VALVE)

(a) Turn the engine switch off.
(b) Disconnect the Q49 canister pump module connector.
(c) Turn the engine switch on (IG).
(d) Measure voltage between terminal 9 of the canister connector and body ground.
Result:

(e) Reconnect the canister pump module connector.
B -- REPAIR OR REPLACE HARNESS OR CONNECTOR
A -- Continue to next step.
22. INSPECT CANISTER ASSEMBLY (VENT VALVE OPERATION)

(a) Turn the engine switch off.
(b) Disconnect the Q49 canister pump module connector.
(c) Apply the battery voltage to terminals 9 and 8 of the pump module.
(d) Touch the pump module to confirm the vent valve operation.
Result:

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

(a) Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the Vacuum Pump.
(b) Measure the voltage between MPMP terminal of ECM connector and body ground when the vacuum pump is turned ON and OFF using the tester.
Result:

B -- REPLACE ECM
A -- Continue to next step.
24. CHECK HARNESS AND CONNECTOR (PUMP MODULE - ECM)

(a) Turn the engine switch off.
(b) Disconnect the Q49 canister pump module connector.
(c) Turn the engine switch on (IG).
(d) On Techstream, enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the Vacuum Pump.
(e) Turn the vacuum pump ON.
(f) Measure the voltage between terminal 1 of the canister connector and body ground.
Result:

(g) Reconnect the canister pump module connector.
B -- REPAIR OR REPLACE HARNESS OR CONNECTOR
A -- Continue to next step.
25. CHECK HARNESS AND CONNECTOR (PUMP MODULE - GROUND)

(a) Turn the engine switch off.
(b) Disconnect the Q49 canister pump module connector.
(c) Measure the resistance between terminal 6 of the canister connector and body ground.
Result:

(d) Reconnect the canister pump module connector.
B -- REPAIR OR REPLACE HARNESS OR CONNECTOR
A -- REPLACE CANISTER
26. INSPECT THROTTLE BODY (EVAP PURGE PORT)
(a) Turn the engine switch off.
(b) Disconnect the EVAP hose from the intake manifold.
(c) Turn the engine switch on (IG).
(d) Use your finger to confirm that the port of the intake manifold has suction.
Result:

(e) Reconnect the EVAP hose.
B -- INSPECT THROTTLE BODY (EVAP PURGE PORT)
A -- REPLACE EVAP HOSE (THROTTLE BODY - EVAP VSV)
27. REINSTALL OR REPLACE FUEL TANK CAP
HINT:
- When reinstalling the fuel tank cap, tighten it until a few click sounds are heard.
- When replacing the fuel tank cap, use a fuel tank 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 TANK CAP
HINT: When installing the fuel tank cap, tighten it until a few click sounds are heard.

NEXT -- PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE)
29. REPAIR EVAP LEAK PART
(a) Disconnect the pressure gauge to the canister with the adapter.

(b) Connect the pressure gauge to the canister with the adapter.

(c) Using SST, pinch the rubber tube to close the canister passage to air.
(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. Check for areas where bubbles appear. This indicates leaking points.
(f) Repair or replace leaking parts.
HINT:
- If the system has leaks, a whistling sound will be heard.
- Disconnect the hose between the canister and the fuel tank from the canister. Close the canister hose connected to the fuel tank, 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
NEXT -- PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE)
31. REPLACE DUTY VACUUM SWITCHING VALVE (EVAP VSV)

(a) Disconnect the connector and hoses from the EVAP VSV.
(b) Remove the EVAP VSV.
(c) Install a new EVAP 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 - EVAP VSV)
NEXT -- PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE)
34. INSPECT THROTTLE BODY (EVAP PURGE PORT)
(a) Remove the throttle body.
(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
NEXT -- PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE)
36. REPAIR OR REPLACE PARTS AND 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)
HINT:
- In the Evaporative System Check (Automatic Mode), the series of 5 Evaporative System Check step are 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, 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 the DTCs DTC Check / Clear.
(b) On 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 engine switch is turned off, the electric vacuum 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 engine 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 engine switch is turned off, the monitor check starts 2.5 hours later.

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

1. P043E: 0.02 inch orifice clogged
In operation B, the vacuum pump creates negative pressure (vacuum) through the 0.02 inch orifice. The EVAP system pressure is then measured by the ECM using the pressure sensor to determine the 0.02 inch leak pressure standard. If the pressure is lower than -4.85 kPa (-36.38 mmHg)*, the ECM interprets this as a clog malfunction in the 0.02 inch orifice, and stops the EVAP (Evaporative Emission) system monitor. The ECM then illuminates the MIL and sets the DTC (2 trip detection logic).
HINT: *: 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: 0.02 inch orifice high-flow
In operation B, the vacuum pump creates negative pressure (vacuum) through the 0.02 inch orifice. The EVAP system pressure is then measured by the ECM using the pressure sensor to determine the 0.02 inch leak pressure standard. If the pressure is lower than -1.06 kPa (-7.95 mmHg)*, the ECM interprets this as a high-flow malfunction in the 0.02 inch orifice, and stops the EVAP system monitor. The ECM then illuminates the MIL and sets the DTC (2 trip detection logic).
HINT: *: 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.