Dodge Ram Truck 1500-2500-3500. Manual — part 1068

P0299-BOOST IN RANGE LOW (CONTINUED)

3.

TURBO CHARGER DAMAGED

Disconnect the air cleaner connection to the turbo charger.

Using the service manual as a guide, visually inspect the turbo charger blades and turbo housing for signs of dam-
age.

Was any damaged found?

Yes

>> Replace The Turbo charger.

Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)

No

>> Go To 4

4.

INTAKE AIR SYSTEM LEAK

Using Miller Special tool # 9022, pressurize the intake air system and inspect for leakage.

Use the service manual as a guide.

Were any leaks detected?

Yes

>> Repair leaking intake air system.

Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)

No

>> Go To 5

5.

BOOST PRESSURE SENSOR

Using the scan tool, compare the boost pressure sensor reading with the ambient air pressure sensor with the igni-
tion turned on.

Are the boost pressure and ambient air pressure sensors within 6 in hg of each other?

Yes

>> Go To 6

No

>> Replace the Boost pressure sensor.

Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)

6.

BOOST PRESSURE SENSOR

Turn the ignition off.

Install Miller special tool #9022.

Ignition on, engine not running.

Use the scan tool and compare boost pressure reading to the regulated air pressure for tool #9022.

NOTE: The reading on the boost pressure sensor may be slightly lower than the regulated pressure.
Does the boost pressure sensor reading increase with the regulated air pressure?

Does the boost pressure sensor reading increase with the regulated air pressure?

Yes

>> Go To 7

No

>> Replace the Boost Pressure sensor.

Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)

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ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL

DR/DH

P0299-BOOST IN RANGE LOW (CONTINUED)

7.

TURBOCHARGER

Disconnect the exhaust outlet connection.

Visually inspect the Wastegate flap in the turbocharger turbine housing

Is the Wastegate seized in the open position?

Yes

>> Replace the Turbocharger.

Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)

No

>> Test Complete.

DR/DH

ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL

9 - 1195

P0300-MULTIPLE CYLINDER MISFIRE

For the Engine circuit diagram (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES/ENGINE CON-
TROL MODULE - SCHEMATIC - ELECTRICAL)

For a complete wiring diagram Refer to Section 8W.

•

When Monitored:
While the engine is idling.

•

Set Condition:
Misfire detected on multiple cylinders.

Possible Causes

LOW FUEL

OTHER DTC’S

DAMAGED FUEL LINES

VALVE TRAIN

OBSTRUCTED FUEL INJECTOR SUPPLY LINES

DAMAGED OR OBSTRUCTED HIGH PRESSURE CONNECTORS

EXTERNAL DAMAGED FUEL INJECTORS

INTERNAL DAMAGED FUEL INJECTOR

NO COMPRESSION

EXCESSIVE ENGINE LEAK DOWN

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)

Diagnostic Test

1.

LOW FUEL

Using the scan tool, verify that the fuel level is above 15%.

Is the fuel level above 15%?

Yes

>> Go To 2

No

>> Add fuel go to step 2.

Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)

2.

OTHER DTC’S

Read the Freeze frame data.

Is the DTC equal to the freeze frame DTC?

Yes

>> Go To 3

No

>> Repair any other DTC’s first.

Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)

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ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL

DR/DH

P0300-MULTIPLE CYLINDER MISFIRE (CONTINUED)

3.

DAMAGED FUEL LINES

Visually inspect the injector supply lines for damage.

Do you have any kinked or bent fuel lines?

Yes

>> Repair or replace damaged fuel lines.

Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)

No

>> Go To 4

4.

VALVE TRAIN

Visually inspect the valve train and check the valve lash on the suspect cylinders.

Is the valve train functional and the lash within the specifications listed in the service manual?

Yes

>> Go To 5

No

>> Adjust the lash or fix or repair any damaged component(s).

Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)

5.

OBSTRUCTED FUEL INJECTOR SUPPLY

Remove the fuel injector supply lines for the suspect cylinders.

Inspect both ends of the fuel injector supply lines for damage.

Using shop air pressure, blow out the fuel injector supply lines to verify that they are not obstructed.

Are the fuel lines free of debris or damage?

Yes

>> Go To 6

No

>> Replace the damaged or obstructed fuel injector supply lines.

Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)

6.

DAMAGED OR OBSTRUCTED HIGH PRESSURE CONNECTORS

Remove the high pressure connectors for the suspect cylinders.

Inspect both ends of the high pressure connectors for signs of damage.

Using shop air pressure, blow out the high pressure connectors to verify that they are not obstructed.

Are the high pressure connectors free of debris or damage?

Yes

>> Go To 7

No

>> Replace the damaged or obstructed high pressure connectors.

Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)

DR/DH

ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL

9 - 1197