Content .. 237 238 239 240 ..

Chrysler Sebring, Stratus sedan, Sebring Convertible. Manual - part 239

Symptom:

*CHECKING FUEL PRESSURE LEAK DOWN

POSSIBLE CAUSES

CHECKING FUEL PRESSURE

FUEL PUMP MODULE

CHECKING FUEL LEAK DOWN

TEST

ACTION

APPLICABILITY

Warning: The fuel system is under a constant pressure (even with the engine
off). Before testing or servicing any fuel system hose, fitting or line, the fuel
system pressure must be released.
Install a fuel pressure gauge.
Start the engine and observe the fuel pressure reading.
NOTE: Fuel pressure specification is 400 KPa +/- 34 KPa (58 psi +/- 5 psi).
Turn the ignition off.
Monitor the fuel pressure gauge for a minimum of 5 minutes.
NOTE: The pressure should not fall below 241 KPa (35 psi)
Does the fuel pressure gauge fall below the above specification?

All

Yes

→ Go To 2

→ Fuel System is operating normally.

Perform POWERTRAIN VERIFICATION TEST VER - 2 - NGC.

NOTE: Before continuing visually and physically inspect the fuel delivery
system for external leaks or damage. Repair /replace as necessary.
Turn the ignition off.
WARNING: The fuel system is under a constant pressure even with the
engine off. Before testing or servicing any fuel system hose, fitting or line,
the fuel system pressure must be released.
Install special 5/16 fuel line adapter tool #6539.
Attach a fuel pressure test gauge to the T fitting on the tool #6539
Start the engine and allow the fuel system to reach maximum pressure.
Turn the ignition off.
NOTE: Fuel specification is 400 KPa +/- 34 KPa (58 psi +/- 5 psi).
Using special tool #C4390, Hose Clamp Pliers, slowly clamp off the rubber hose on
the Fuel Pressure adapter between the fuel pressure gauge and the engine.
Monitor the fuel pressure gauge for a minimum of 5 minutes.
NOTE: The pressure should not fall below 241 KPa (35 psi)
Does the fuel pressure gauge fall below the above specification?

All

Yes

→ Check the Fuel Delivery System between the fuel gauge and the

fuel pump module. Inspect the seal points and the fuel lines for
signs of fuel leakage. Repair/Replace as necessary. If OK, replace
the Fuel Pump Module.
Perform POWERTRAIN VERIFICATION TEST VER - 2 - NGC.

→ Check the Fuel Delivery System between the fuel gauge and the

333

STARTING

Symptom:

*CHECKING HARD START (FUEL DELIVERY SYSTEM)

POSSIBLE CAUSES

RESTRICTED FUEL SUPPLY LINE

FUEL PUMP MODULE

FUEL PUMP INLET STRAINER PLUGGED

FUEL INJECTOR(S)

FUEL PUMP MODULE

FUEL CONTAMINATION

TEST

ACTION

APPLICABILITY

t, actuate the ASD Fuel System test and observe the fuel pressure

gauge.
NOTE: Fuel pressure specification is 400 KPa +/- 34 KPa (58 psi +/- 5 psi).
Choose a conclusion that best matches your fuel pressure reading.

All

Below Specification

Go To

Within Specification

Go To

Turn the ignition off.
WARNING: The fuel system is under a constant pressure even with the
engine off. Before testing or servicing any fuel system hose, fitting or line,
the fuel system pressure must be released.
Raise vehicle on hoist, and disconnect the fuel supply line at the fuel pump module.
Install special 5/16 fuel line adapter tool #6539 between the disconnected fuel line
and the fuel pump module.
Attach a fuel pressure test gauge to the T fitting on the tool #6539
Turn the ignition on.
With the DRBIII

t, actuate the ASD Fuel System test and observe the fuel pressure

gauge.
NOTE: Fuel pressure specification is 400 KPa +/- 34 KPa (58 psi +/- 5 psi).
Is the fuel pressure within specification?

All

Yes

→ Visually and physically inspect the fuel supply lines between the

fuel tank and the fuel rail. Repair/replace as necessary. If no
problem is found replace the fuel filter.
Perform POWERTRAIN VERIFICATION TEST VER - 2 - NGC.

→ Go To 3

334

STARTING

TEST

ACTION

APPLICABILITY

All

Yes

→ Replace the Fuel Pump Inlet Strainer.

Perform POWERTRAIN VERIFICATION TEST VER - 2 - NGC.

→ Replace the Fuel Pump Module.

Perform POWERTRAIN VERIFICATION TEST VER - 2 - NGC.

Fuel pressure gauge still installed.
NOTE: Fuel pressure specification is 400 KPa +/- 34 KPa (58 psi +/- 5 psi).
Ensure the fuel pressure is at maximum pressure.
Monitor the fuel pressure gauge for a minimum of 5 minutes.
NOTE: The pressure should not fall below 241 KPa (35 psi)
Does the fuel pressure gauge fall below the above specification?

All

Yes

→ Go To 5

→ Check the fuel for contaminants.

Perform POWERTRAIN VERIFICATION TEST VER - 2 - NGC.

All

Yes

→ Check the Fuel Delivery System between the fuel gauge and the

fuel injectors. Inspect the seal points and the fuel lines for signs of
fuel leakage. Repair/Replace as necessary. If OK, replace the
leaking Fuel Injector(s).
Perform POWERTRAIN VERIFICATION TEST VER - 2 - NGC.

335

STARTING

*CHECKING HARD START (FUEL DELIVERY SYSTEM) —

Continued

Symptom:

*ENGINE CRANKS DOES NOT START

POSSIBLE CAUSES

FUEL PUMP RELAY

NO START PRE-TEST

OTHER POSSIBLE CAUSES FOR NO START

POWERTRAIN FUSES OPEN

FUEL PRESSURE OUT OF SPECS

RESTRICTED FUEL SUPPLY LINE

FUEL PUMP INLET STRAINER PLUGGED

FUEL PUMP MODULE

FUEL PUMP RELAY FUSED B+ CIRCUIT

FUEL PUMP RELAY OUTPUT CIRCUIT OPEN

FUEL PUMP GROUND CIRCUIT OPEN/HIGH RESISTANCE

FUEL PUMP MODULE

TEST

ACTION

APPLICABILITY

Note: The following list of items must be checked before continuing with
any no start tests.
The battery must be fully charged and in good condition. A low charged battery may
produce invalid test results. If the battery is low, charge the battery and then attempt
to start the vehicle by cranking the engine for 15 seconds, 3 consecutive times.
This will allow any DTC’s to set that may have been erased due to a dead battery.
Ensure the Powers and Ground to the PCM are ok.
Make sure the PCM communicates with the DRB and that there are no DTC’s stored
in the PCM memory. If the PCM reports a No Response condition, refer to the
Communication category for the proper tests.
Read the PCM DTC’s with the DRB. If any DTC’s are present, they must be repaired
before continuing with any other No Start diagnostic tests. Refer to the Symptom list
for the related P-code that is reported by the PCM.
Ensure that the PCI bus is functional. Attempt to communicate with the Instrument
Cluster and SKIM, If you are unable to establish communicate refer to the
Communication category for the proper symptoms.
The Sentry Key Immobilizer System must be operating properly. Check for proper
communication with the DRBIII

t and check for DTC’s that may be stored in the

Sentry Key Immobilizer Module (SKIM). repair the DTC(s) before continuing.
If no DTC’s are found, using the DRB select Clear PCM (Batt Disconnect).
Crank the engine several times. Using the DRB, read DTC’s. If a DTC is present
perform the DTC diagnostics before continuing.
Were any problems found?

All

Yes

→ Repair as necessary.

Perform POWERTRAIN VERIFICATION TEST VER - 1.

→ Go To 2

336

STARTING

Content .. 237 238 239 240 ..