Dodge Durango (HB). Manual — part 752
PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE (CONTINUED)
4.
WIRE HARNESS INSPECTION
Clear the DTC(s).
Attempt to duplicate the customer complaint.
Whether the customer complaint can be duplicated or not, make a quick wire harness inspection related to the
DTC(s) that were previously cleared.
Check the Powertrain Control Module connectors, the suspected component connection, in-line connectors, wire
harness splices, PCM power and ground circuits, and any related fuses.
If the DTC(s) are fuel or air related, check the fuel level and quality.
Were any repairs made that fixed the customer’s complaint?
Yes
>> Testing complete.
No
>> Refer to the diagnostic test procedure related to the DTC.
HB
ENGINE ELECTRICAL DIAGNOSTICS
9 - 7
INTERMITTENT CONDITION
For the Engine circuit diagrams (Refer to 9 - ENGINE - SCHEMATICS AND DIAGRAMS).
For a complete wiring diagram Refer to Section 8W.
POSSIBLE CAUSES
INTERMITTENT CONDITION
Diagnostic Test
1.
INTERMITTENT CONDITION
NOTE: The conditions that set the DTC are not present at this time. The following list may help in identi-
fying the intermittent condition.
WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands
near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in
personal injury or death.
Refer to any Technical Service Bulletins (TSBs) that may apply.
Review the scan tool Freeze Frame information. If possible, try to duplicate the conditions under which the DTC set.
With the engine running at normal operating temperature, monitor the scan tool parameters related to the DTC while
wiggling the wire harness. Look for parameter values to change and/or a DTC to set.
Turn the ignition off.
Visually inspect the related wire harness. Disconnect all the related harness connectors. Look for any chafed,
pierced, pinched, partially broken wires and broken, bent, pushed out, or corroded terminals.
Perform a voltage drop test on the related circuits between the suspected faulty component and the PCM.
CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage
the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform
diagnosis.
Inspect and clean all PCM, engine, and chassis grounds that are related to the most current DTC.
If numerous trouble codes were set, use a wire schematic and look for any common ground or supply circuits.
For any Relay DTCs, actuate the Relay with the scan tool and wiggle the related wire harness to try to interrupt the
actuation.
For intermittent Evaporative Emission trouble codes perform a visual and physical inspection of the related parts
including hoses and the Fuel Filler cap.
For intermittent Misfire DTC’s check for restrictions in the Intake and Exhaust system, proper installation of Sensors,
vacuum leaks, and binding components that are run by the accessory drive belt.
Use the scan tool to perform a System Test if one applies to failing component.
A co-pilot, data recorder, and/or lab scope should be used to help diagnose intermittent conditions.
Were any problems found during the above inspections?
Yes
>> Perform the necessary repairs.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Test Complete.
9 - 8
ENGINE ELECTRICAL DIAGNOSTICS
HB
P0016–CRANKSHAFT / CAMSHAFT TIMING MISALIGNMENT
HB
ENGINE ELECTRICAL DIAGNOSTICS
9 - 9
P0016–CRANKSHAFT / CAMSHAFT TIMING MISALIGNMENT (CONTINUED)
For the Engine circuit diagram (Refer to 9 - ENGINE - SCHEMATICS AND DIAGRAMS).
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
Engine cranking and Engine running
•
Set Condition:
Powertrain Control Module detects an error when the camshaft position is out of phase with the crankshaft
position. One Trip Fault. Three good trips to turn off the MIL.
Possible Causes
ERRATIC CAM POSITION SENSOR SIGNAL
CAMSHAFT POSITION SENSOR TONE WHEEL/PULSE RING
ERRATIC CRANKSHAFT POSITION SENSOR SIGNAL
CRANKSHAFT POSITION SENSOR TONE WHEEL/PULSE RING
CAMSHAFT POSITION SENSOR
CRANKSHAFT POSITION SENSOR
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING).
Diagnostic Test
1.
ACTIVE DTC
WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands
near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in
personal injury or death.
With the scan tool clear the DTC(s).
Start the engine and run until operating temp is reached. (Closed Loop)
If the DTC does not reset it may be necessary to test drive the vehicle.
Does the P0016 return?
Yes
>> Go To 2
No
>> Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
2.
CHECKING THE CMP SIGNAL WITH A LAB SCOPE
With a lab scope, backprobe the (K44) CMP Signal circuit at the CMP Sensor harness connector.
WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands
near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in
personal injury or death.
Start the engine.
Observe the lab scope screen.
Are there any irregular or missing signals?
Yes
>> Go To 3
No
>> Go To 6
9 - 10
ENGINE ELECTRICAL DIAGNOSTICS
HB
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