| 1 |
Perform an On-Board Diagnostic (OBD II) System Check.
Is the system check complete? |
- |
Go to Step 2 |
Go to On-Board Diagnostic (OBD II) System Check |
| 2 |
- Install a scan tool.
- Command the Evaporative (EVAP) emission canister purge valve and vent solenoid ON and OFF with the scan tool.
Does the purge valve and vent solenoid click ON and OFF? |
- |
Go to Step 3 |
- |
| 3 |
- Turn the ignition OFF.
- Remove the fuel cap.
- Turn the ignition switch ON.
Is the Fuel Tank Pressure at the specified value? |
1.56 V (± 0.1 V) |
Go to Step 6 |
Go to Step 4 |
| 4 |
Check the battery.
Has the battery been disconnected? |
- |
Go to "EVAP CONTROL SYSTEM DIAGNOSIS
" |
Go to Step 5 |
| 5 |
Disconnect the battery.
Is the action complete? |
- |
Go to Step 3 |
- |
| 6 |
NOTE:
Before continuing with this diagnosis, zero the EVAP Pressure and Vacuum gauges on the EVAP pressure/purge cart J-41413. Also read the temperature variation instruction card.
- Reinstall the fuel cap.
- Using the scan tool, command the EVAP Vent Solenoid ON (closed).
- Connect the EVAP pressure/purge cart J-41413 to the EVAP service port.
- Pressurize the EVAP system to the specified value using the EVAP pressure/purge cart J-41413 (monitor the pressure using the gauge an the cart with the switch in the HOLD position.
- Observe the Fuel Tank Pressure on the scan tool.
Is the Fuel Tank Pressure at the second specified value? |
5 in. H2O 1.56 V (± 0.1 V) |
Go to Step 7 |
Go to "EVAP CONTROL SYSTEM DIAGNOSIS
" |
| 7 |
NOTE:
Review the temperature variation instructions included with the J-41413 before performing this step.
- Turn the ignition switch ON, with the engine OFF.
- Using the scan tool, command the EVAP Vent Solenoid ON (closed).
- Pressurize the EVAP system to the specified value using the EVAP pressure/purge cart J-41413 (monitor the pressure using the gauge on the cart).
- Switch the rotary switch on the cart to HOLD and observe the EVAP pressure gauge.
Does the pressure decrease to less than the specified value within 2 minutes? |
10 in. H2O |
Go to Step 8 |
Go to Diagnostic Aids |
| 8 |
- Disconnect the fuel tank vapor line and the EVAP purge line from the EVAP canister.
- Block the fuel tank vapor line fitting on the canister.
- Connect a hand vacuum pump to the EVAP purge line fitting on the canister.
- Ensure that the EVAP vent solenoid is still commanded ON (closed).
- Attempt to apply vacuum to the canister.
Can the specified vacuum be maintained? |
17 kPa (5 in. Hg) |
Go to Step 11 |
Go to Step 9 |
| 9 |
- Visually/Physically check for the following conditions:
- Vent hose disconnected or damaged
- EVAP canister damaged
Is a repair necessary? |
- |
Go to Step 13 |
Go to Step 10 |
| 10 |
Replace the EVAP vent solenoid.
Is the action complete? |
- |
Go to Step 13 |
- |
| 11 |
- Visually/Physically check for the following conditions:
- Malfunctioning fuel cap
- Leaking fuel tank vapor line
- Damaged EVAP purge line
- If a problem is found, repair as necessary.
Is a problem found? |
- |
Go to Step 13 |
Go to Step 12 |
| 12 |
- Using the scan tool, command the EVAP vent solenoid ON (closed).
- With the EVAP pressure/purge cart J-41413 connected to the EVAP system by leaving the cart control knob in the pressurized position.
- Using the ultrasonic leak detector J-41416, locate and repair the leak in the EVAP system (it may be necessary to partially lower the fuel tank to examine the top tank connections).
Is the repair complete? |
- |
Go to Step 13 |
- |
| 13 |
NOTE:
Review the temperature variation instructions included with the J-41413 before performing this step.
- Turn the ignition switch ON, with the engine OFF.
- Using the scan tool, command the EVAP Vent Solenoid ON (closed).
- Pressurize the EVAP system to the specified value using the EVAP pressure/purge cart J-41413 (monitor the pressure using the gauge on the cart).
- Switch the rotary switch on the cart to HOLD and observe the EVAP pressure gauge.
Does the pressure decrease to less than the specified value within 2 minutes? |
15 in. H2O 10 in. H2O |
System OK |
Go to Step 2 |