LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Isuzu >> 2008 >> Ascender LS, RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 4.2L - DTC P0366 To DTC P2444 >> DTC P0455 >> Circuit/System Testing
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Circuit/System Testing

IMPORTANT:
  • Larger volume fuel tanks and/or those with lower fuel levels may require several minutes for the floating indicator to stabilize.
  • Refer to the J 41413-200  operation manual for detailed instructions in Evaporative Emission System Diagnosis . See Special Tools .
  1. Connect the J 41413-200  to the vehicle service port. See Special Tools . For vehicles without a service port, disconnect the purge tube at the quick connector on the EVAP canister side of the EVAP canister purge solenoid valve and install the CH-48096  . See Special Tools .
  2. Use a scan tool to seal the system and use the flow meter on the J 41413-200  , calibrated to 0. See Special Tools .51 mm (0.020 in) to determine that there is no leak in the EVAP system.
    • If a leak is detected use the J 41413-200  to apply smoke to the EVAP system at the service port or the filler neck until the leak is located. See Special Tools .
  3. Using the GE-41415-50  , connect the J 41413-200  to the fuel filler neck. See Special Tools .
  4. Start the engine.
  5. Allow the engine to idle.
  6. Use the Purge/Seal function to seal the system with a scan tool.
  7. Command the EVAP canister purge solenoid valve to 20 percent.
  8. The vacuum/pressure gage on the J 41413-200  and the FTP parameter on the scan tool should both show vacuum. See Special Tools .
    • If the vacuum/pressure gage shows vacuum but the FTP parameter does not show vacuum, replace the FTP sensor.
    • If neither the FTP parameter nor the vacuum/pressure gage shows vacuum, repair the restriction in the purge path.
  9. Verify that the vacuum increases to the abort limit on the scan tool or more than 3.2 volts, and the value is similar between the scan tool and the vacuum/pressure gage on the J 41413-200  . See Special Tools .
    • If the values are not similar or the voltage did not reach 3.2 volts, replace the FTP sensor.
scientia non olet · About LEMON Manuals