Dodge Ram Truck 1500-2500-3500. Manual — part 1049

P0148-HIGH PRESSURE COMMON RAIL (HPCR) CHECKSUM (CONTINUED)

8.

FUEL RETURN LINE OBSTRUCTION, DAMAGED OR DEBRIS

Check the fuel return lines for signs of obstruction, damage, or debris.

Are the fuel drain lines damaged or blocked?

Yes

>> Repair cause of high fuel drain line restriction.

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

No

>> Go To 9

9.

LIFT PUMP FLOW

Perform the no trouble code

9

Lift Pump flow test

9

. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

Did the Lift pump pass the test?

Yes

>> Go To 10

No

>> Replace the Lift Pump.

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

10.

PRESSURE LIMITING VALVE

Perform the no trouble code test

9

Pressure Limiting Valve on the Fuel Rail for internal leaks

9

.

Did the pressure limiting valve pass the test procedure?

Yes

>> Go To 11

No

>> Replace the Pressure Limiting Valve.

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

11.

LEAKING FUEL INJECTORS OR HIGH PRESSURE CONNECTORS

Perform the no trouble test

9

*Injector return flow test

9

. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

Are any Injectors leaking or high pressure connectors leaking?

Yes

>> Replace or repair the leaking fuel injectors or high pressure connectors.

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

No

>> Go To 12

12.

HIGH PRESSURE FUEL PUMP

Perform the no trouble code test

9

HIGH PRESSURE FUEL PUMP PERFORMANCE TEST

9

. (Refer to 9 - ENGINE

- DIAGNOSIS AND TESTING)

Did the fuel pump pass the high pressure fuel pump performance test?

Yes

>> Refer to the INTERMITTENT CONDITION Symptom (Diagnostic Procedure). (Refer to 9 - ENGINE -

DIAGNOSIS AND TESTING)

No

>> Replace the High pressure fuel pump.

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

9 - 1118

ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL

DR/DH

P0169-WATER IN FUEL (WIF) LIGHT ON TOO LONG

DR/DH

ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL

9 - 1119

P0169-WATER IN FUEL (WIF) LIGHT ON TOO LONG (CONTINUED)

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 running.

•

Set Condition:
Water in fuel light was on for a calibrated amount of time.

Possible Causes

OTHER DTC’S PRESENT

WATER IN FUEL

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

Diagnostic Test

1.

OTHER DTC’S PRESENT

With the scan tool, read DTCs.

Is P2269 displayed?

Yes

>> Repair P2269 DTC first.

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

No

>> Drain water in fuel.

9 - 1120

ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL

DR/DH

P0191-FUEL RAIL PRESSURE SENSOR PERFORMANCE

DR/DH

ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL

9 - 1121