STEP 1. Using scan tool (M.U.T.-IIISE), check the evaporative emission system monitor test.
(1) Carry out an evaporative emission system monitor. Refer to Evaporative Emission System Monitor Test . (2) Check the item 193, EVP Leak from Tank in the data list.
(3) Turn off the power supply mode of the electric motor switch.
Is the data list "Normal"?
The evaporative emission system is working properly at this time. Explain to the customer that an improperly tightened fuel cap can cause the MIL to illuminate. Return the vehicle to the customer. Go to Step 2.
STEP 2. Check of harness damage in COVB line between MFI relay connector and evaporative leak check module connector.
STEP 3. Check of harness damage in EVB, ECOV, EVSE, EVS and EVSS line between evaporative leak check module connector and ECM connector.
STEP 4. Check of harness damage in E line between evaporative leak check module connector and ground.
STEP 5. Check of harness damage in power supply line between MFI relay connector and evaporative emission purge solenoid connector.
STEP 6. Check of harness damage in PURG line between evaporative emission purge solenoid connector and ECM connector.
STEP 7. Check the evaporative emission purge solenoid for leaks.
STEP 8. Check for leaks in evaporative emission hose A, chamber and hose B.
STEP 9. Check for leaks in evaporative emission hose C.
STEP 10. Check for leaks in evaporative emission hose D.
STEP 11. Check for leaks in evaporative emission hose E.
STEP 12. Check the fuel tank solenoid valve for leaks.
STEP 13. Check for leaks in evaporative emission hoses F, G and H.
(1) Drain the fuel from the fuel tank.
(2) Use a hand vacuum pump to check each hose F, G and H.
Does the hose hold vacuum?
Go to Step 14. Replace any damaged hose. Then go to Step 16.
STEP 14. Check for leaks in the fuel tank.
(1) Visually check for cracks or other leaks in the fuel tank.note | Carefully check the fuel pump module and the fuel tank differential pressure sensor installation in the fuel tank. |
(2) Connect the evaporative emission system pressure pump (Miller number 6872A) to the fuel filler hose.
(3) Plug the hose and the nipple shown in the illustration.note | If these items are not securely plugged now, the fuel could leak in the next step. |
(4) Pressurize the fuel tank with the evaporative emission system pressure pump.
(5) In the pressurized state, check for leaks by applying a soapy water solution to each section and look for bubbles.
Are any leaks found?
: Repair or replace the leaked parts and check again that there are no leaks. Then reinstall the fuel tank. Then go to Step 16. : Replace the fuel tank. Go to Step 16. When there is no leak, reinstall the fuel tank. Then go to Step 15.
STEP 15. Replace the bypass valve (integrated in evaporative emission canister).
(1) Replace the bypass valve (integrated in evaporative emission canister).
(2) Carry out an evaporative emission system monitor. Refer to Evaporative Emission System Monitor Test . (3) Check the item 193, EVP Leak from Tank in the data list.
(4) Turn off the power supply mode of the electric motor switch.
Is the data list "Normal"?
The inspection is complete. Replace the ECM (Refer to Removal and Installation ). Then go to Step 16.
STEP 16. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 3 . (2) Check the diagnostic trouble code (DTC).
Is DTC P04EE set?
Repeat the troubleshooting. The procedure is complete.