Dodge Neon / Neon SRT-4. Manual - part 563

TEST

ACTION

APPLICABILITY

To continue testing you will need Miller Tool #8404 Evaporative Emission Leak
Detector (EELD).
WARNING: Keep lit cigarettes, sparks, flames, and other ignition sources
away from the test area to prevent the ignition of explosive gases. Keep the
test area well ventilated.
NOTE: The fuel tank should have between 20% and 80% of fuel tank capacity
to properly test the Evap system.
Connect the red power lead of EELD to the battery positive terminal and the black
ground lead to battery negative terminal.
NOTE: See Charts and Graph support material EELD Calibration Setup for
an example.
Block the vent hose of the EVAP Canister.
Connect shop air to the EELD.
Set the smoke/air control switch to AIR.
Insert the tester’s AIR supply tip (clear hose) into the .040 orifice on the tester’s
control panel.
Press the remote smoke/air start button.
Position the red flag on the air flow meter so it is aligned with the indicator ball.
When the calibration is complete, release the remote button. The EELD is now
calibrated the flow meter in liters per minute.
Install the service port adapter #8404-14 on the vehicle’s service port (if equipped) or
install the #8404-ADP service adapter in the NVLD filter line.
Connect the Air supply hose from the EELD to the service port.
Press the remote button to activate AIR flow.
NOTE: Larger volume fuel tanks, lower fuel levels or if the vehicle is
equipped with a Flow Management Valve, this may indicate high flow and
will require 4 to 5 minutes to fill.
Compare the flow meter indicator ball reading to the red flag.
ABOVE the red flag indicates a leak present.
BELOW the red flag indicates a sealed system.
Is the indicator ball above the red flag?

All

Yes

→ Go To 7

→ Go To 8

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DRIVEABILITY - NGC

P0440-GENERAL EVAP SYSTEM FAILURE —

Continued

TEST

ACTION

APPLICABILITY

NOTE: A thorough visual inspection of the Evap system hoses, tubes, and
connections may save time in your diagnosis. Look for any physical damage
or signs of wetness at connections. The strong smell of fuel vapors may aid
diagnosis also.
To continue testing, you will need Miller Tool #8404 Evaporative Emissions Leak
Detector (EELD).
Remove the Air supply hose from the service port.
Connect the SMOKE supply tip (black hose) to the service port.
Set the smoke/air control switch to SMOKE.
NOTE: The flow meter indicator ball will not move at this point.
Press the remote smoke/air start button.
NOTE: Ensure that smoke has filled the EVAP system by continuing to press
the remote smoke/air start button, remove the vehicle fuel cap, and wait for
the smoke to exit. Once smoke is indicated reinstall the fuel cap.
NOTE: For optimal performance, introduce smoke into the system for an
additional 60 seconds; continue introducing smoke at 15 second intervals,
as necessary.
While still holding the remote smoke/air start button, use the white light (#8404-
CLL) to follow the EVAP system path, and look for the source of the leak indicated by
exiting smoke.
If a leak is concealed from view (i.e., top of fuel tank), release the remote smoke/air
start button, and use the ultraviolet (UV) black light #8404-UVL and the yellow
goggles 8404-20 to look for residual traces of dye that are left behind by the smoke.
The exiting smoke deposits a residual fluid that is either bright green or bright
yellow in color when viewed with a UV light.
NOTE: Carefully inspect the vent side of the EVAP Canister. Due to the
filtering system in the canister the smoke or dye may or may not be visual.
Introducing smoke into the filtered side of the canister may assist in
locating the leak.
Was a leak found?

All

Yes

→ Repair or replace the leaking component as necessary.

Perform POWERTRAIN VERIFICATION TEST VER - 6.

→ NOTE: Before continuing, check the PCM harness connector

terminals for corrosion, damage or terminal push out. Repair as
necessary. Replace and program the Powertrain Control Module
in accordance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

Turn the ignition off.
Disconnect the NVLD electrical harness connector.
Check connectors - Clean/repair as necessary.
Using a jumper wire, jumper across the (K107) NVLD Switch Sense circuit and the
(Z1) Ground circuit in the NVLD electrical harness connector.
Monitor the NVLD Switch state on the DRBIII

Does the Switch change from OPEN to CLOSED.

All

Yes

→ Replace the NVLD Assembly.

Perform POWERTRAIN VERIFICATION TEST VER - 5.

→ Go To 9

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DRIVEABILITY - NGC

P0440-GENERAL EVAP SYSTEM FAILURE —

Continued

TEST

ACTION

APPLICABILITY

Turn the ignition off.
Disconnect the NVLD electrical harness connector.
Measure the resistance between the (Z1) Ground circuit and ground.
Is the resistance below 5.0 ohms?

All

Yes

→ Go To 10

→ Repair the open in the (Z1) Ground circuit.

Perform POWERTRAIN VERIFICATION TEST VER - 5.

Turn the ignition off.
Disconnect the NVLD electrical harness connector.
Disconnect the PCM harness connector.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the (K107) NVLD Switch Signal circuit from the NVLD
electrical harness connector to the appropriate terminal of the special tool #8815.
Is the resistance below 5.0 ohms?

All

Yes

→ NOTE: Before continuing, check the PCM harness connector

→ Repair the open in the (K107) NVLD Switch Signal Circuit.

Perform POWERTRAIN VERIFICATION TEST VER - 5.

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DRIVEABILITY - NGC

P0440-GENERAL EVAP SYSTEM FAILURE —

Continued

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 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

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

→ Refer to the INTERMITTENT CONDITION symptom in the

Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

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

→ Replace the Evap Purge Solenoid.

Perform POWERTRAIN VERIFICATION TEST VER - 5.

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