Isuzu 1999 RODEO Workshop Manual page 885

6E1–258 RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION
DTC P0442 EVAP Control System Small Leak Detected (Cont'd)
Step
6 Disconnect the battery, wait 20 seconds then
reconnect the battery.
Is the action complete?
7 IMPORTANT: Before continuing with this diagnosis,
zero the EVAP Pressure and Vacuum Gauges on the
EVAP pressure/purge cart J41413. Also read the
temperature variation instruction card. (Refer to tool
operating instructions).
1. Reinstall the fuel cap.
2. Using the Tech 2, command the EVAP vent solenoid
ON (closed).
3. Connect the EVAP pressure/purge cart J41413 to
the EVAP service port.
4. Pressurize the EVAP system to the specified value
using the EVAP pressure/purge cart J41413
(monitor the pressure using the gauge on the cart
with the switch in the HOLD position.
5. Observe the Fuel Tank Pressure on the Tech 2.
Is the Fuel Tank Pressure at the specified value?
8 IMPORTANT: Review
instructions included
performing this step.
1. Turn the ignition switch ON, with the engine OFF.
2. Using the Tech 2, command the EVAP vent solenoid
ON (closed).
3. Pressurize the EVAP system to the specified value
using the EVAP pressure/purge cart J41413
(monitor the pressure using the gauge on the cart).
4. 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?
9 1. Disconnect the fuel tank vapor line and the EVAP
purge line from the EVAP canister.
2. Block the fuel tank vapor line fitting on the canister.
3. Connect a hand vacuum pump to the EVAP purge
line fitting on the canister.
4. Ensure that the EVAP vent solenoid is still
commanded ON (closed).
5. Attempt to apply vacuum to the canister.
Can the specified vacuum be maintained?
10 1. Visually/physically
conditions:
f
Vent hose disconnected or damaged.
f
EVAP canister damaged
2. If a problem is found, repair as necessary
Was a repair necessary?
11 Replace the EVAP vent solenoid. Refer to Diagnostic
Aids
Is the action complete?
Action
the temperature variation
with the J41413 before
check for the following
Value(s) Yes
— Go to Step 4
5 in. H2O ( 2
in. H2O) Go to Step 8
1.47 – 1.51V Go to Step 9
Go to Step
5 in. Hg 12
Go to Step
—
14
Go to Step
— 14
No
—
Go to EVAP
Control
System
Diagnosis
Refer to
Diagnostic
Aids
Go to Step
10
Go to Step
11
—