Part 2
1NZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: EVAP System
- EVAP System - Continued
15. CHECK EVAP HOSE (PURGE VSV - INTAKE MANIFOLD)
(a) Disconnect the hose (connected to the intake manifold) 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 INTAKE MANIFOLD (EVAP PURGE PORT)
A -- Continue to next step.
16. INSPECT PURGE VSV
(a) Remove the purge VSV.
(b) Apply the 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 PURGE VSV
A -- Continue to next step.
17. CHECK HARNESS AND CONNECTOR (POWER SOURCE OF PURGE VSV)
(a) Disconnect the C3 purge VSV connector.
(b) Turn the ignition switch to ON.
(c) Measure the voltage between terminal 2 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 C20 ECM connector and the C3 purge VSV connector.
(b) Check the resistance.
Standard resistance:
(c) Reconnect the purge VSV connector.
(d) Reconnect the ECM connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE ECM
19. INSPECT CANISTER PUMP MODULE (POWER SOURCE FOR VENT VALVE)
(a) Turn the ignition switch off.
(b) Disconnect the J25 canister pump module connector.
(c) Turn the ignition switch to ON.
(d) Measure the voltage between VLVB terminal of the canister pump module connector and the body ground.
Result
(e) Reconnect the canister pump module connector.
B -- REPAIR OR REPLACE HARNESS OR CONNECTOR
A -- Continue to next step.
20. INSPECT CANISTER PUMP MODULE (VENT VALVE OPERATION)
(a) Turn the ignition switch off.
(b) Disconnect the J25 canister pump module connector.
(c) Apply the battery voltage to VLVB and VGND terminals of the canister pump module.
(d) Touch the canister pump module to confirm the vent valve operation.
Result
(e) Reconnect the canister connector.
B -- REPLACE CANISTER ASSEMBLY
A -- Continue to next step.
21. CHECK HARNESS AND CONNECTOR (ECM - CANISTER PUMP MODULE)
(a) Disconnect the A21 ECM connector.
(b) Disconnect the J25 canister pump module connector.
(c) Check the resistance between VPMP terminal of the ECM connector and VGND terminal of the canister pump module connector.
Result
(d) Reconnect the ECM connector.
(e) Reconnect the canister pump module connector.
B -- REPAIR OR REPLACE HARNESS OR CONNECTOR
A -- REPLACE ECM
22. PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE VACUUM PUMP)
(a) Turn the ignition switch off.
(b) Disconnect the J25 canister pump module connector.
(c) Turn the ignition switch to ON.
(d) On the Techstream, enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the Vacuum Pump.
(e) Measure the voltage between MTRB terminal 1 of the canister pump module connector and the body ground when the leak detection pump is turned ON and OFF using the Techstream.
Result
C -- REPLACE ECM
B -- CHECK HARNESS AND CONNECTOR (ECM - CANISTER PUMP MODULE)
A -- Continue to next step.
23. CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - BODY GROUND)
(a) Turn the ignition switch off.
(b) Disconnect the J25 canister pump module connector.
(c) Check the resistance between MGND terminal of the canister pump module connector and the body ground.
Result
(d) Reconnect the canister pump module connector.
B -- REPAIR OR REPLACE HARNESS OR CONNECTOR
A -- REPLACE CANISTER ASSEMBLY
24. CHECK HARNESS AND CONNECTOR (ECM - CANISTER PUMP MODULE)
(a) Turn the ignition switch off.
(b) Disconnect the J25 canister pump module connector.
(c) Disconnect the A21 ECM connector.
(d) Check the resistance between MPMP terminal of the ECM connector and MTRB terminal of the canister pump module connector.
Result
(e) Reconnect the canister pump module connector.
(f) Reconnect the ECM connector.
B -- REPAIR OR REPLACE HARNESS OR CONNECTOR
A -- REPLACE ECM
25. INSPECT INTAKE MANIFOLD (EVAP PURGE PORT)
(a) Stop the engine.
(b) Disconnect the EVAP hose from the intake manifold.
(c) Start the engine.
(d) Use your finger to confirm that the port of the intake manifold has suction.
Result
(e) Reconnect the EVAP hose.
B -- INSPECT INTAKE MANIFOLD (EVAP PURGE PORT)
A -- REPLACE EVAP HOSE (INTAKE MANIFOLD - PURGE VSV)
26. CORRECTLY REINSTALL OR REPLACE FUEL CAP
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 EVAPORATIVE SYSTEM CHECK (AUTOMATIC MODE)
27. REPLACE FUEL CAP
HINT
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 EVAPORATIVE SYSTEM CHECK (AUTOMATIC MODE)
28. LOCATE EVAP LEAK PART
(a) Disconnect the vent hose.
(b) Connect the EVAP pressure tester tool to the vent hose with the adapter.
(c) Pressurize the EVAP system to 3.2 to 3.7 kPa (24 to 28 mmHg).
(d) Apply soapy water to the piping and connecting parts of the EVAP system.
(e) Look for areas where bubbles appear. This indicates the leak point.
(f) 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 EVAPORATIVE SYSTEM CHECK (AUTOMATIC MODE)
29. 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 and 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 EVAPORATIVE SYSTEM CHECK (AUTOMATIC MODE)