Dodge Ram Truck 1500-2500-3500. Manual — part 1080
P0340-CAMSHAFT POSITION (CMP) LOST (CONTINUED)
9.
(K44) SIGNAL CIRCUIT SHORT TO VOLTAGE
Measure the voltage between the (K44) signal circuit in the sensor
harness connector and battery negative.
Is the voltage less than 1 volt?
Yes
>> Go To 10
No
>> Repair (K44) signal circuit 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)
10.
ECM
Reconnect the ECM harness connectors.
Measure the voltage between the (K44) signal circuit in the sensor
harness connector and battery negative.
Is the voltage less than 1 volt?
Yes
>> Refer to the INTERMITTENT CONDITION Symptom
(Diagnostic Procedure). (Refer to 9 - ENGINE - DIAGNO-
SIS AND TESTING)
No
>> Replace the ECM.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)
9 - 1242
ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL
DR/DH
P0341-CAMSHAFT POSITION (CMP) SENSOR SIGNAL
DR/DH
ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL
9 - 1243
P0341-CAMSHAFT POSITION (CMP) SENSOR SIGNAL (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:
The ECM no longer detects a signal from the Engine Position Sensor.
Possible Causes
INJECTOR DTC’S PRESENT
OTHER DTC’S
CAMSHAFT SENSOR
(K44) SIGNAL CIRCUIT OPEN
(F855) 5-VOLT SUPPLY CIRCUIT OPEN
(K916) RETURN CIRCUIT OPEN
(K44) SIGNAL CIRCUIT SHORTED TO GROUND
(K44) SIGNAL CIRCUIT SHORTED TO (F855) 5-VOLT SUPPLY CIRCUIT
(K44) SIGNAL CIRCUIT SHORTED TO (K916) RETURN CIRCUIT
(K44) SIGNAL CIRCUIT SHORT TO VOLTAGE
ECM
INTERMITTENT CONDITION
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
Diagnostic Test
1.
INJECTOR DTC’S PRESENT
With the scan tool, read DTCs.
Do you have a DTC for P2146 or P2149?
Yes
>> Repair injector 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
2.
OTHER DTC’S
With the scan tool, read DTCs.
Is any other DTC’s present?
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 3
9 - 1244
ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL
DR/DH
P0341-CAMSHAFT POSITION (CMP) SENSOR SIGNAL (CONTINUED)
3.
CAMSHAFT SENSOR
Turn the ignition off.
Disconnect the cam sensor harness connector.
Check connectors - Clean/repair as necessary.
Measure the resistance between the (F855) 5-volt supply circuit and the (K44) signal circuit of the sensor.
Is the resistance between 900 and 1100 ohms?
Yes
>> Go To 4
No
>> Replace the camshaft sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)
4.
(K44) SIGNAL CIRCUIT OPEN
Disconnect the ECM harness connectors.
Measure the resistance of the (K44) signal circuit between the ECM
harness connector and the sensor harness connector.
Is the resistance less than 10 ohms?
Yes
>> Go To 5
No
>> Repair the open (K44) signal 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 - 1245
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