Dodge Ram Truck 1500-2500-3500. Manual — part 1075
P0335-CRANKSHAFT POSITION (CKP) LOST (CONTINUED)
10.
(K24) SIGNAL CIRCUIT SHORTED GROUND
Measure the resistance between the (K24) signal circuit and ground.
Is the resistance greater than 100k Ohms?
Yes
>> Go To 11
No
>> Repair the short circuit or replace the engine harness.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)
11.
(K853) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND
Measure the resistance between the (K853) 5-volt supply circuit and
ground.
Is the resistance greater than 100k Ohms?
Yes
>> Go To 12
No
>> Repair the short circuit or replace the engine harness.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)
9 - 1222
ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL
DR/DH
P0335-CRANKSHAFT POSITION (CKP) LOST (CONTINUED)
12.
(K24) SIGNAL CIRCUIT SHORTED TO (K853) 5-VOLT SUPPLY CIRCUIT
Measure the resistance between the (K24) signal circuit and the
(K853) 5-volt supply circuit in the sensor connector.
Is the resistance greater than 100k Ohms?
Yes
>> Go To 13
No
>> Repair the short circuit or replace the engine harness.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)
13.
ECM
Reconnect the ECM harness connectors.
Ignition on, engine not running.
With the scan tool, erase DTCs.
Connect a jumper wire between the sensor supply circuit and the sen-
sor return circuit in the sensor harness connector.
Did DTC P0337 set?
Yes
>> Refer to the INTERMITTENT CONDITION Symptom
(Diagnostic Procedure).
(Refer to 9 - ENGINE - DIAGNOSIS 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)
DR/DH
ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL
9 - 1223
P0336-CRANKSHAFT POSITION (CKP) SENSOR SIGNAL
9 - 1224
ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL
DR/DH
P0336-CRANKSHAFT POSITION (CKP) 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:
With the key on.
•
Set Condition:
The voltage detected at the Crankshaft position sensor is below a calibrated value.
Possible Causes
CKP SENSOR
(K24) SIGNAL CIRCUIT OPEN
(K853) 5-VOLT SUPPLY CIRCUIT OPEN
(K975) RETURN CIRCUIT OPEN
(K24) SIGNAL CIRCUIT SHORTED TO (K975) RETURN CIRCUIT
(K853) 5-VOLT SUPPLY CIRCUIT SHORTED TO (K975) RETURN CIRCUIT
(K24) SIGNAL CIRCUIT SHORTED TO (K853) 5-VOLT SUPPLY CIRCUIT
(K24) SIGNAL CIRCUIT SHORTED TO GROUND
(K853) 5-VOLT SUPPLY CIRCUIT SHORTED TO BATTERY NEGATIVE
INTERMITTENT CONDITION
ECM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
Diagnostic Test
1.
CKP SENSOR
Disconnect the CKP sensor harness connector.
NOTE: Check connectors - Clean/repair as necessary.
Measure the resistance between the (K853) 5-volt supply circuit and the (K24) signal circuit of the sensor.
Is the resistance between 900 and 1100 ohms?
Yes
>> Go To 2
No
>> Replace the CKP sensor.
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 - 1225
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