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Home >> Isuzu >> 2007 >> i-290 LS, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 89 (Engine Control System & Fuel System - 3.7L - DTC P0365 To DTC P1107) >> DTC P0455 >> Test Description

Test Description

WARNING: This page is about a different car, the 2007 Isuzu i-370, 2007 GMC Canyon, and 2007 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

  1. 4:  Introducing smoke in 15-second intervals may allow smaller leak areas to be more noticeable. When the system is less pressurized, the smoke will sometimes escape in a more condensed manner.
  2. 6:  This step verifies proper operation of the FTP sensor.
  3. 7:  A normal operating FTP sensor should increase above 5 inches of H2O and stop between 6-7 inches of H2O.
DTC P0455

Step Action Values Yes No
Schematic Reference: Evaporative Emissions Hose Routing Diagram
1 Did you perform the Diagnostic System Check - Vehicle? - Go to Step 2  Go to Diagnostic System Check - Vehicle
2
  1. Inspect the evaporative emission (EVAP) system for the following conditions:
    • Loose, missing, or damaged service port schrader valve
    • Loose, incorrect, missing, or damaged fuel fill cap
    • A damaged EVAP canister purge solenoid valve
  2. Raise the vehicle on a hoist. Refer to Lifting and Jacking the Vehicle .
  3. Inspect the EVAP system for the following conditions:
    • Disconnected, improperly routed, kinked, or damaged EVAP pipes and hoses
    • A damaged EVAP canister vent solenoid valve or EVAP canister
Did you find and correct the condition?		 - Go to Step 18  Go to Step 3 
3
IMPORTANT: Larger volume fuel tanks and/or those with lower fuel levels may require several minutes for the floating indicator to stabilize.
  1. Turn the nitrogen/smoke valve to NITROGEN.
  2. Connect the nitrogen/smoke hose to the 0.5 mm (0.20 in) test orifice on the bottom-front of the J 41413-200  Evaporative Emissions System Tester (EEST).
  3. Use the remote switch to activate the J 41413-200  .
  4. Align the red flag on the flow meter with the floating indicator. Use the remote switch to de-activate the J 41413-200  .
  5. Install the GE-41415-50  Interrupted Thread Fuel Tank Cap Adapter to the fuel fill pipe.
  6. Remove the nitrogen/smoke hose from the test orifice and install the hose onto the GE-41415-50  .
  7. Turn ON the ignition, with the engine OFF.
  8. Command the EVAP vent solenoid valve closed with a scan tool.
  9. Use the remote switch to introduce nitrogen and fill the EVAP system until the floating indicator stabilizes.
  10. Compare the flow meter stable floating indicator position to the red flag.
Is the floating indicator below the red flag?		 - Go to Step 6  Go to Step 4 
4 
IMPORTANT: Ensure that the vehicle underbody temperature is similar to the ambient temperature and allow the surrounding air to stabilize before starting the diagnostic procedure. System flow will be less with higher temperatures.
  1. Turn OFF the ignition.
  2. Connect the J 41413-200  power supply clips to a known good 12-volt source.
  3. Install the GE-41415-50  to the fuel fill pipe.
  4. Connect the J 41413-200  nitrogen/smoke supply hose to the GE-41415-50  .
  5. Turn ON the ignition, with the engine OFF.
  6. Command the EVAP canister vent solenoid valve closed with a scan tool.
  7. Turn the nitrogen/smoke valve on the J 41413-200  control panel to SMOKE.
  8. Use the remote switch to introduce smoke into the EVAP system.
  9. Use the J 41413-VLV  EVAP Service Port Vent Fitting to open the EVAP service port.
  10. Remove the J 41413-VLV  once smoke is observed.
  11. Continue to introduce smoke into the EVAP system for an additional 60 seconds.
  12. Inspect the entire EVAP system for exiting smoke with the J 41413-SPT  High Intensity White Light.
  13. Continue to introduce smoke at 15-second intervals until the leak source has been located
Did you locate and repair a leak source?		 - Go to Step 18  Go to Step 5 
5
  1. Disconnect the GE-41415-50  from the fuel fill pipe.
  2. Install the fuel fill cap to the fuel fill pipe.
  3. Connect the J 41413-200  nitrogen/smoke supply hose to the EVAP service port.
  4. Use the remote switch to introduce smoke into the EVAP system.
  5. Inspect the entire EVAP system for exiting smoke with the J 41413-SPT  .
  6. Continue to introduce smoke at 15-second intervals until the leak source has been located.
Did you locate and repair a leak source?		 - Go to Step 18  Go to Step 6 
6 
  1. Use the remote switch to stop introducing smoke.
  2. Install the GE-41415-50  to the fuel fill pipe.
  3. Connect the J 41413-200  nitrogen/smoke supply hose and vehicle fuel fill cap to the GE-41415-50  .
  4. Command the EVAP canister vent solenoid valve open with a scan tool.
  5. Compare the fuel tank pressure sensor parameter with a scan tool to the J 41413-200  pressure/vacuum gage.
Is the difference between the 2 gages less than the specified value?		 +1 to -1 in H2O Go to Step 7  Go to Step 14 
7 
  1. Seal the EVAP system using the EVAP Purge/Seal function with a scan tool.
  2. Turn the nitrogen/smoke valve on the J 41413-200  control panel to NITROGEN.
  3. Use the J 41413-200  to pressurize the EVAP system to the first specified value.
Is the fuel tank pressure sensor parameter more than the second specified value?		 10 in H2O
5 in H2O		 Go to Step 8  Go to Step 14 
8
  1. Use the remote switch to stop introducing nitrogen into the EVAP system.
  2. Increase the EVAP canister purge solenoid valve to 100 percent.
Is the fuel tank pressure sensor parameter less than the specified value?		 1 in H2O Go to Diagnostic Aids Go to Step 9 
9 Disconnect the EVAP purge pipe from the EVAP canister purge solenoid valve.
Is the fuel tank pressure sensor parameter less than the specified value?		 1 in H2O Go to Step 12  Go to Step 10 
10 Disconnect the EVAP purge pipe at the EVAP canister.
Is the fuel tank pressure sensor parameter less than the specified value?		 1 in H2O Go to Step 16  Go to Step 11 
11 Disconnect the EVAP vapor pipe at the EVAP canister.
Is the fuel tank pressure sensor parameter less than the specified value?		 1 in H2O Go to Step 17  Go to Step 13 
12 Inspect the EVAP canister purge solenoid valve vacuum source for a restriction or blockage.
Did you find and correct the condition?		 - Go to Step 18  Go to Step 15 
13 Repair the pinched or obstructed EVAP vapor pipe.
Did you complete the repair?		 - Go to Step 18  -
14 Replace the fuel tank pressure (FTP) sensor. Refer to Fuel Tank Pressure Sensor Replacement .
Did you complete the replacement?		 - Go to Step 18  -
15 Replace the EVAP canister purge solenoid valve. Refer to Evaporative Emission Canister Purge Solenoid Valve Replacement .
Did you complete the replacement?		 - Go to Step 18  -
16 Repair the restriction in the EVAP purge pipe.
Did you complete the repair?		 - Go to Step 18  -
17 Replace the EVAP canister. Refer to Evaporative Emission Canister Replacement .
Did you complete the replacement?		 - Go to Step 18  -
18
IMPORTANT: Larger volume fuel tanks and/or those with lower fuel levels may require several minutes for the floating indicator to stabilize.
  1. Turn the nitrogen/smoke valve to NITROGEN.
  2. Connect the nitrogen/smoke hose to the 0.5 mm (0.20 in) test orifice on the bottom-front of the J 41413-200  .
  3. Use the remote switch to activate the J 41413-200  .
  4. Align the red flag on the flow meter with the floating indicator. Use the remote switch to de-activate the J 41413-200  .
  5. Install the GE-41415-50  to the fuel fill pipe.
  6. Remove the nitrogen/smoke hose from the test orifice and install the hose onto the GE-41415-50  .
  7. Turn ON the ignition, with the engine OFF.
  8. Command the EVAP canister vent solenoid valve closed with a scan tool.
  9. Use the remote switch to introduce nitrogen and fill the EVAP system until the floating indicator stabilizes.
  10. Compare the flow meter stable floating indicator position to the red flag.
Is the floating indicator below the red flag?		 - Go to Step 19  Go to Step 3 
19 Compare the fuel tank pressure sensor parameter with a scan tool to the J 41413-200  pressure/vacuum gage.
Is the difference between the 2 gages less than the specified value?		 1 in H2O Go to Step 20  Go to Step 5 
20
  1. Observe the J 41413-200  pressure/vacuum gage.
  2. Increase the EVAP purge solenoid valve to 100 percent.
Does the pressure decrease?		 - Go to Step 21  Go to Step 8 
21 Observe the Capture Info with a scan tool.
Are there any DTCs that have not been diagnosed?		 - Go to Diagnostic Trouble Code (DTC) List - Vehicle System OK
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