Isuzu 1999 RODEO Workshop Manual page 969

6E1–342 RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION
DTC P1441 – EVAP System Flow During Non-Purge (Cont'd)
Step
4 1. Disconnect the EVAP pressure / purge cart J41413,
and then plug the hose end.
2. Disconnect the rubber hose end of engine vacuum
source side, (the hose connected between Purge
Solenoid Valve and engine).
3. Connect a vacuum hand pump to this rubber hose
end.
4. Then apply -15 in H2O vacuum by the vacuum
pump.
5. Monitor the fuel tank inner pressure using the Tech
2.
Does the fuel tank inner pressure hold the specified
value?
5 Replace the Purge Solenoid Valve.
6 1. Check for leaks, kinks or pinched hoses at the
EVAP system rubber hose line, and also check if the
rubber hoses are correctly connected or not.
2. Check for a leak from Vent Solenoid Valve and
EVAP system rubber hoses, and also check for
clogged Filter of air separator which is located near
the vent solenoid valve.
Was a problem found? Using the Vacuum Hose
Routing Diagram, repair or re-connect the rubber
hoses correctly.
7 1. Start engine.
2. Remove the Fuel Filler Cap.
3. Using the Tech 2, command the EVAP Vent
Solenoid Valve "ON" (closed) and Purge Solenoid
Valve "OFF" (0%).
4. Replace the Fuel Filler Cap.
5. Run the engine at 2500RPM constant while
monitoring "Fuel Tank Vacuum" on the Tech 2.
Does the fuel tank vacuum remain at the specified
value while the EVAP Vent Solenoid Valve "ON"
(closed) and Purge Solenoid Valve "OFF" (o%)?
Action Value(s) Yes
1.47 - 1.51 V Go to Step 6
— Verify repair
— Verify repair
30 - 40% Verify repair
No
Go to Step 5
—
Go to Step 7
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Diagnostic
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