Chrysler Voyager. Manual — part 89

Symptom:

P0441-EVAP PURGE SYSTEM PERFORMANCE

When Monitored and Set Condition:

P0441-EVAP PURGE SYSTEM PERFORMANCE

When Monitored:

Cold start test. Engine Running. Small Leak Test Passed.

Set Condition:

The PCM activates the EVAP Purge solenoid and gradually increases to

maximum flow. During flow, the PCM looks for the NVLD switch to close. If the PCM does
not see the NVLD switch close at maximum flow an error is detected. Two Trip Fault.

POSSIBLE CAUSES

GOOD TRIP EQUAL TO ZERO

INTERMITTENT CONDITION

CHECKING EVAP PURGE SOLENOID FUNCTIONALITY

EVAP PURGE SOLENOID VACUUM SUPPLY

TEST

ACTION

APPLICABILITY

1

NOTE: If any of the following DTCs are set (P0443, P0452, P0453, P0498 or
P0499) diagnose them first before continuing with P0441.
Ignition on, engine not running.
With the DRBIII

t, read DTCs and record the related Freeze Frame data.

Is the Good Trip Counter displayed and equal to zero?

All

Yes

→ Go To 2

No

→ Refer to the INTERMITTENT CONDITION symptom in the

Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.

2

NOTE: After disconnecting the Evap Purge vacuum connections, inspect
the lines and solenoid for any signs of contamination or foreign materials.
Using a hand vacuum pump, apply 10 in Hg to

9CAN9 side of the EVAP Purge

Solenoid.
Ignition on, engine not running.
Observe the vacuum gauge.
With the DRBIII

t, actuate the EVAP Purge Solenoid .

Does the vacuum drop when the solenoid is actuated?

All

Yes

→ Go To 3

No

→ Replace the Evap Purge Solenoid.

Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.

355

DRIVEABILITY - NGC

TEST

ACTION

APPLICABILITY

3

Turn the ignition off.
Carefully inspect the Evap Purge Solenoid vacuum supply hose for proper routing.
Check for a pinched or plugged hose from the throttle body to the Purge Solenoid.
Inspect the vacuum port at the throttle body for any damage or plugging.
Were any problems found?

All

Yes

→ Repair the vacuum supply hose/tube as necessary.

Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.

No

→ Refer to the INTERMITTENT CONDITION symptom in the

Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.

356

DRIVEABILITY - NGC

P0441-EVAP PURGE SYSTEM PERFORMANCE —

Continued

Symptom List:

P0442-EVAP SYSTEM MEDIUM LEAK
P0455-EVAP SYSTEM LARGE LEAK

Test Note:

All symptoms listed above are diagnosed using the same tests.

The title for the tests will be P0442-EVAP SYSTEM MEDIUM
LEAK.

When Monitored and Set Condition:

P0442-EVAP SYSTEM MEDIUM LEAK

When Monitored:

Engine Running. Cold start test. Fuel Level greater than 12%. Ambient

Temperature between 4°C and 32°C (39°F and 89°F) Close Loop fuel system. Test runs
when small leak test is maturing.

Set Condition:

The PCM activates the EVAP Purge Solenoid to pull the EVAP system into

a vacuum to close the NVLD swtich. Once the NVLD swtich is closed, the PCM turns the
EVAP Pugre solenoid off to seal the EVAP system. If the NVLD switch reopens before the
calibrated amount of time for a Medium leak an error is detected. Two Trip Fault.

P0455-EVAP SYSTEM LARGE LEAK

When Monitored:

Engine Running. Cold start test. Fuel Level greater than 12%. Ambient

Temperature between 4°C and 32°C (39°F and 89°F) Close Loop fuel system. Test runs
when small leak test is maturing.

Set Condition:

The PCM activates the EVAP Purge Solenoid to pull the EVAP system into

a vacuum to close the NVLD swtich. Once the NVLD switch is closed, the PCM turns the
EVAP Purge solenoid off to seal the EVAP system. If the NVLD switch reopens before the
calibrated amount of time for a Large leak an error is detected. Two Trip Fault.

POSSIBLE CAUSES

INTERMITTENT CONDITION

VISUAL AND PHYSICAL INSPECTION

EVAPORATIVE EMISSION LEAK DETECTION

EVAP PURGE SOLENOID OPERATION

NVLD SWITCH OPERATION

357

DRIVEABILITY - NGC

TEST

ACTION

APPLICABILITY

1

NOTE: Since a hot vehicle can conceal a leak, it is best to perform this test
at room temperature.
NOTE: A loose gas cap could have caused this DTC to set. Make sure gas cap
is tight and in good condition. Ensure the gas cap meets OEM specifications.
Ignition on, engine not running.
With the DRBIII

t, read DTCs and record the related Freeze Frame data.

Is the Good Trip Counter displayed and equal to zero?

All

Yes

→ Go To 2

No

→ Go To 7

2

Perform a visual and physical inspection of the entire Evaporative Emission system.
Check for the follow conditions:
- Holes or cracks
- Loose seal points
- Evidence of damaged components
- Incorrect routing of hoses and tubes
- Fuel Cap gasket seal
Were any of the above conditions found?

All

Yes

→ Repair as necessary.

Perform POWERTRAIN VERIFICATION TEST VER - 6 - NGC.

No

→ Go To 3

358

DRIVEABILITY - NGC

P0442-EVAP SYSTEM MEDIUM LEAK —

Continued