Dodge Ram Truck 1500-2500-3500. Manual — part 1128

P2149-BANK 2 (CYLINDERS 4-6) SHORTED HIGH OR LOW (CONTINUED)

For the Engine circuit diagram (Refer to 9 - ENGINE - SCHEMATICS AND DIAGRAMS)

For a complete wiring diagram Refer to Section 8W.

•

When Monitored:
While the engine is running.

•

Set Condition:
A misfire detected at cylinders 4,5, or 6 or any combination of cylinders 4,5, or 6.

Possible Causes

OTHER DTC’S

HIGH SIDE DRIVER CIRCUIT OPEN

LOW SIDE DRIVER CIRCUIT OPEN

HIGH SIDE DRIVER SHORTED TO LOW SIDE DRIVER

HIGH SIDE DRIVERS SHORTED LOW

LOW SIDE DRIVER CIRCUIT SHORTED OTHER LOW SIDE DRIVER CIRCUIT

LOW SIDE DRIVERS SHORTED LOW

HIGH SIDE DRIVER SHORTED TO VOLTAGE

LOW SIDE DRIVER SHORTED TO VOLTAGE

LOW SIDE DRIVER CIRCUIT SHORTED IN INJECTOR HARNESS

INJECTOR

INJECTOR HARNESS

ECM

INTERMITTENT CONDITION

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

Diagnostic Test

1.

OTHER DTC’S

With the scan tool, read DTCs.

Do you have any combination of DTC’s P0204, P0205, or P0206?

Yes

>> Repair 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)

No

>> Go To 2

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ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL

DR/DH

P2149-BANK 2 (CYLINDERS 4-6) SHORTED HIGH OR LOW (CONTINUED)

2.

HIGH SIDE DRIVER CIRCUIT OPEN

Turn the ignition off.

Disconnect the ECM harness connectors.

Disconnect the Injector 4-6 harness connector.

NOTE: Check connectors - Clean/repair as necessary.
Measure the resistance of the injector high side driver circuit between
the Bank 2 high side driver circuit in the ECM harness connector and
the high side driver circuit in the injector harness connectors for cylin-
ders 4-6.

Is the resistance less than 10 Ohms?

Yes

>> Go To 3

No

>> Repair the open high side driver circuit from ECM harness

connector to the Injector harness connector.

Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)

3.

LOW SIDE DRIVER CIRCUIT OPEN

Measure the resistance of the #4,#5, and #6 injector low side driver
circuits between the ECM harness connector and the injector harness
connectors.

Is the resistance less than 10 Ohms?

Yes

>> Go To 4

No

>> Repair the open low side driver circuit.

Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)

DR/DH

ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL

9 - 1435

P2149-BANK 2 (CYLINDERS 4-6) SHORTED HIGH OR LOW (CONTINUED)

4.

HIGH SIDE DRIVER SHORTED TO LOW SIDE DRIVER

Measure the resistance between the Bank 2 high side driver circuit at
the ECM harness connector and the low side driver circuit for injectors
4-6 at the ECM harness connector.

Is the resistance more than 100k Ohms?

Yes

>> Go To 5

No

>> Repair the High side circuit shorted to the low side circuit.

Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)

5.

HIGH SIDE DRIVERS SHORTED LOW

Measure the resistance of the injector harness connector high side
driver circuits to battery negative for injectors 4-6.

Is the resistance more than 100k Ohms?

Yes

>> Go To 6

No

>> Repair the High side driver shorted low in the harness.

Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)

9 - 1436

ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL

DR/DH

P2149-BANK 2 (CYLINDERS 4-6) SHORTED HIGH OR LOW (CONTINUED)

6.

LOW SIDE DRIVERS SHORTED LOW

Measure the resistance of the injector harness connector Low side
driver circuits to battery negative for injectors 4-6.

Is the resistance more than 100k Ohms?

Yes

>> Go To 7

No

>> Repair the Low side driver shorted low in the harness.

Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)

7.

HIGH SIDE DRIVER SHORTED TO VOLTAGE

Turn Ingition on, engine off.

Measure the voltage between the high side driver circuit in the engine
harness and battery negative.

Is the voltage less than 1 volt?

Yes

>> Go To 8

No

>> Repair the high side driver shorted to voltage.

Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)

DR/DH

ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL

9 - 1437