Workshop Manual

6E–334
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
DTC P0448 EVAP Vent Solenoid Circuit Short
Step Action Value(s) Yes No
1 Was the “On-Board (OBD) System Check” performed?
— Go to Step 2
Go to OBD
System
Check
2 1. Install the Tech 2.
2. Ignition is “ON”,
3. Observe the EVAP vent solenoid reading on the
Tech 2.
Is the EVAP vent solenoid reading near the specified
value?
0%
Refer to
Diagnostic
Aids
Go to Step 3
3 Check the signal circuit for canister vent solenoid valve.
1. Ignition is “OFF”.
2. Disconnect the canister vent solenoid valve.
3. Disconnect the PCM.
4. Check the circuit between EVAP vent solenoid
connector and PCM connector.
Is the problem found?
— Go to Step 4 Go to Step 5
4 Repair the circuit as necessary.
Is the action complete?
— Verify repair —
5 Check the canister vent solenoid valve. Using a DVM,
measure resistance for purge solenoid valve connector
terminal.
Is the vent solenoid valve resistance within the
specified values?
21.8-28.5W
(at
68°F{20°C})
Go to Step 7 Go to Step 6
6 Replace the canister vent solenoid valve.
Is the action complete?
— Verify repair —
7 Replace the PCM.
IMPORTANT: The replacement PCM must be
programmed.
Refer to
ON-Vehicle Service in Power Control Module
and Sensors for procedures. And also refer to latest
Service Bulletin.
Check to see if the latest software is released or not.
And then Down Load the LATEST PROGRAMMED
SOFTWARE to the replacement PCM.
Is the action complete?
— Verify repair —