Dodge Ram Truck 1500-2500-3500. Manual — part 1127
P2146-BANK 1 (CYLINDERS 1-3) SHORTED HIGH OR LOW (CONTINUED)
10.
LOW SIDE DRIVER CIRCUIT SHORTED IN INJECTOR HARNESS
Reconnect the disconnected injector harness connector.
Measure the resistance of each of the Bank 1 low side driver circuit to
all other Bank 1 low side driver circuit at the ECM harness connector.
Is the resistance greater than 100k ohms?
Yes
>> Go To 11
No
>> Replace the injector harness.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)
11.
INJECTOR CIRCUITS SHORTED INSIDE ENGINE
Disconnect the injector through head harness connector.
Measure the resistance of each injector from the through head con-
nector.
NOTE: Be sure to zero the ohm meter prior to checking the injec-
tor circuit.
Is the resistance greater than 0 ohms and less than 1 ohm?
Yes
>> Go To 12
No
>> Go To 14
9 - 1430
ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL
DR/DH
P2146-BANK 1 (CYLINDERS 1-3) SHORTED HIGH OR LOW (CONTINUED)
12.
INJECTOR
Disconnect the pigtail nuts from injectors 1-3.
NOTE: Check connectors - Clean/repair as nec-
essary.
Measure the resistance between the solenoid posts
of each injector.
NOTE: Be sure to zero the ohm meter prior to
checking the injector circuit.
Is the resistance less than 1 ohm and greater
than 0 ohms?
Yes
>> Go To 13
No
>> Replace the fuel injector or injectors.
Perform POWERTRAIN VERIFICATION
TEST VER - 1 (DIESEL). (Refer to 8 -
ELECTRICAL/ELECTRONIC
CON-
TROL MODULES/ENGINE CONTROL
MODULE - DIAGNOSIS AND TEST-
ING)
13.
INJECTOR HARNESS
Measure resistance of each circuit in the injector harness from pigtail
side to injector harness connector.
Is resistance above 1 ohm?
Yes
>> Replace the injector harness.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)
No
>> Refer to the INTERMITTENT CONDITION Symptom
(Diagnostic Procedure). (Refer to 9 - ENGINE - DIAGNO-
SIS AND TESTING)
DR/DH
ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL
9 - 1431
P2146-BANK 1 (CYLINDERS 1-3) SHORTED HIGH OR LOW (CONTINUED)
14.
ECM
Reconnect the all injector pig tails harness connector.
Reconnect the ECM harness connector.
Reconnect the Injector harness connector.
Start the engine.
With the scan tool, read DTCs.
Did the DTC return?
Yes
>> Replace and program the ECM in accordance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)
No
>> Refer to the INTERMITTENT CONDITION Symptom (Diagnostic Procedure). (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
9 - 1432
ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL
DR/DH
P2149-BANK 2 (CYLINDERS 4-6) SHORTED HIGH OR LOW
DR/DH
ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL
9 - 1433
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